Category: Class 10

Balbharti Maharashtra State Board Class 10 Science Solutions Part 2 Chapter 9 Social Health Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 10 Science Solutions Part 2 Chapter 9 Social Health

Question 1.
Fill in the blanks with appropriate word.
a. Laughter club is a remedy to drive away …………..
(a) stress
(b) addictions
(c) lethargy
(d) epidemics
Answer:
(a) stress

b. Alcohol consumption mainly affects …………. system.
(a) digestive
(b) respiratory
(c) nervous
(d) excretory
Answer:
(c) nervous

c. IT Act 2000 is to control the ……….
(a) housebreaking
(b) cybercrimes
(c) cheating
(d) pickpocketing
Answer:
(b) cybercrimes

Question 2.
Answer the following.
a. Which factors affect the social health?
Answer:
(1) In order to maintain the social health of any community there should be good amenities for the people. E.g. food, water, shelter, clothing, medicines and medical help, equal opportunities for education, cleanliness of the surroundings, transport facilities etc. should be properly provided.

(2) The social and political conditions of the surrounding should be such that there should not be any connections with world of criminals. The presence of such criminal ties can affect the social health to a great extent.

(3) The gardens, playgrounds, the empty plots for outdoor games, sports clubs, etc. are important criteria for overall development of the society. This results into personality development and make people happy and strong.

(4) Addictions, criminal tendencies, pervert behaviour and perverse thinking affects other people in the society and this reflects negatively on the social health.

(5) Having large number of friends and relatives, proper use of time when alone and when along the peer group, trust in others, respect and acceptance for others build stronger social health.

b. Which changes occur in persons continuously using the internet and mobile phones?
Answer:

• When a person continuously remains in contact with mobile phones, many physical problems can arise.
• Tiredness, headache, insomnia, forgetfulness, tinnitus, joint pains and problems in vision occur due to radiation emanating from the cell phones. For young children this is more disastrous as these radiations can penetrate through their bones.
• By logging into the internet for a long time, persons become solitary. Such individuals are unable to establish harmonious relations with relatives and other people around.
• They tend to become self-centred and selfish, They lose sensitivity towards others.
• Such people never take any social responsibility and the social health is thus disturbed.

c. Which problems does the common man face due to incidences of cybercrime?
Answer:

• The numbers of Aadhaar card, PAN card, credit or debit card are obtained by the cheaters. This is a cybercrime. The PIN number can be misused and the money can be withdrawn from the bank accounts. The looters withdraw cash from our accounts in this way.
• People can be cheated during online shopping.
• Fake account on Facebook is opened and false information is displayed on it. Through such accounts the girls are emotionally and financially exploited.
• Electronic media are misused for sending derogatory and vulgar messages, obscene pictxfres and provocative statements.
• Through the internet, hackers can send virus to crash someone’s computer or even mobile phones.
  In all such different ways, common people can be victimized by cybercrime.

d. Explain the importance of good communication with others.
Answer:

• Nowadays, there is fierce competition, insecurity and criminal tendencies in the society.
• This kind of atmosphere is increasing mental and emotional stress.
• If the stress remains buried in the mind, persons are depressed or frustrated. This causes, mental disorders if not treated in time. Depression can lead to addictions. The suicidal thoughts hover in the mind. If at that phase we can open our heart by good communication, many problems can be solved.
• Help from counsellors can be taken to relieve the stress.
• By good communication with parents or family members harmonious relations can be re-established.

Question 3.
Solve the following crossword.

1. Continuous consumption of alcoholic and tobacco materials.
Answer:
Addiction

2. This app may cause the cybercrimes
Answer:
Facebook

3. A remedy to resolve stress.
Answer:
Singing

4. Requirement for stress free life.
Answer:
Goodfood

5. Various factors affect ……….. health.
Answer:
Social

6. Art of preparing food items.
Answer:
Cooking.

Question 4.
What are the various ways to minimize mental stress?
Answer:
The ways of stress-bursting are as follows:
(1) Laughter club: People gather together and laugh collectively to reduce stress.

(2) Good communication: One should establish good communication with friends, siblings, cousins, teachers, parents or anybody in whom we can confide and express our feelings.

(3) Writing: By writing and noting the thoughts we feel relieved. We can confess and analyse about our mistakes through writing to reduce our stress.

(4) Hobbies: Collecting curios, photography, reading good literature, music, cooking, gardening, bird watching, keeping a pet, sculpturing, drawing, rangoli, dancing, etc. are such hobbies which are necessary for utilizing our spare time by creativity. Persuading hobby is the best way to be stress-free. Music in particular is said to change the negative thoughts, therefore, listening to music, learning the music and singing helps to fight stress. By admiring nature too, stress is relieved.

(5) Outdoor games and physical exercise: By participating in the sports, there are various benefits such as physical exercise, improving discipline, interaction with others and creating the tendency of unity, becoming more social and reduce stress.

Question 5.
Give three examples of each.
a. Hobbies to reduce stress.
Answer:

1. To listen to music
2. Bird watching and nature trails
3. Reading good books.

b. Diseases endangering the social health.
Answer:

1. AIDS
2. Tuberculosis
3. Leprosy.

c. Physical problems arising due to excessive use of mobile phones.
Answer:

1. Headache
2. Vision problems
3. Joint pains.

d. Activities under the jurisdiction of cybercrime laws.
Answer:

1. To do bank transactions by procuring PIN number of somebody.
2. Misuse of written material of someone or illegal sale of the same.
3. Hacking the information of government institutes and companies.

Question 6.
What will you do? Why?
a. You are spending more time in internet/mobile games, phone, etc.
Answer:
In life, the time once spent never returns back. We therefore must use our time for studies, exercise or outdoor games and some entertainment. In the free time, we must also help our parents in house hold work. But if we are spending hours together on surfing the net without any perfect aim or playing the computer or cell phone games it is total waste of time.

There are many inappropriate sites on the internet, which should not be watched. This causes stress. Continuous use of mobile phone and being hooked to the social media slowly becomes an addiction. If these bad habits are creeping in us, we must try to leave the habits by conscious change.

b. Child of your neighbour is addicted to tobacco chewing. (July 2019)
Answer:
The hazards of tobacco chewing will be explained to this child. Different photographs and videos showing the conditions of oral cancer will be shown to this child to persuade him, so that he can stay away from tobacco. This addiction has to be removed, so help of his parents will be taken. They will be told about the child’s habit and asked to help ? him free from his addiction.

c. Your sister has become incommunicative. She prefers to remain alone. (July 2019)
Answer:
The individual who prefers to be incommunicative has lots of thoughts in his/her mind. If this is the case with sister, she will be taken into confidence and the reason behind this lack of communication will be found out. Most often such persons have depression. So she will not be left alone. Her friends will be invited at home, so that she can converse with them. She should be motivated to mix with her favourite people. She should be encouraged to pursue her hobbies. She should be helped in selecting such work, If nothing changes her, then the help of counsellor should be taken.

d. You have to use free space around your home for good purpose.
Answer:
The free space around our home can be used to make a small garden. The garden-soil can be bought and spread in this free space. Small saplings can be planted here and nurtured for further growth. Nursery of saplings can also be started in this free space.

The space can also be used for outdoor games. The net for Badminton can be fixed and evening times can be spent in playing the game. Also care will be taken to keep the space clean and without any garbage.

e. Your Mend has developed the hobby of snapping selfies. (July 2019)
Answer:
The habit of continuously taking selfie is bad. It shows that the friend is constantly thinking of himself only. His self-centredness is to be removed by counselling him. The reason behind this behaviour should also be understood. He should be diverted and motivated to take some other tasks so that his habit can be lessened. Taking selfies is not a hobby. It is a bad habit if someone is repeatedly engaged in it.

f. Your brother studying in XII has developed the stress.
Answer:
The syllabus for class XII is vast. If the studies are not taken seriously from the beginning of the academic year, then the stress develops due to the fear of examination and result. Therefore, instead of being stressed, he should practise time management and study schedule. He should think of only one subject at a time. The atmosphere in the house should be maintained happy and tension-free. Everybody in the house should interact with him so that he gets a feeling that he is not alone. He should be convinced, “study is for you and you are not for study”.

Question 7.
What type of changes occur in a home having chronically ill old person? How will you help to maintain good atmosphere?
Answer:
If there is a chronically ill old person in the house, the entire atmosphere of the house changes. There is tension and grief in the house. Doctor’s visits to the house become routine. The ill person’s diet and medicines are strictly followed.

In such times, everybody in the family should contribute to the work of taking care of the patient. We can help in bringing medicines. We can sit beside the patient during night time. We should maintain pleasant atmosphere in the house. We should help the person who is burdened by the duties towards the sick patient by helping in whatever little ways that we can.

Project: (Do it your self)

Project 1.
Enlist various factors affecting the social health in your residential area. Decide the necessary changes to correct the situation and implement those changes.

Let’s Think: (Text Book Page No. 101)

Question 1.
Elders always instruct you to get out of the home to interact with relatives and others and play outdoor games but not to spend time continuously with television, phone and internet. Why the children of your age are instructed same in each home?
Answer:
When we interact with the relative, it becomes easier to mix with other strangers later. The personality moulds when we talk and interact with different people. We can exchange the thoughts. We learn to converse in a rightful way. When we go to playground and take part in outdoor games, we get health benefits. Sitting at home and spending productive time in just mobile or computer games, does not benefit in any way.

Most of the serials on the television are of no use for any kind of personality development, instead they push us in a virtual world. Except for few channels like National Geographic and Animal Kingdom, we do not get any knowledge by television viewing.

The elders in the house are experienced people. They understand ‘what is good’ and ‘what is to be avoided’. They are also genuinely concerned about bright future of the youngsters in the house. By giving instructions to the youngsters, they never get benefitted but it is our generation that gets proper guidance. These instructions should be followed for a perfect personality and bright future.

Think: (Text Book Page No. 103)

Question 1.
Whether the incidence shown in the following picture is rational? Express your opinion.

Answer:
In the picture is seen a woman asking the beggar to move away. The beggar looks dirty and sick. In one way, the picture looks proper as the beggar may be causing inconvenience to the people in that house. He is unhygienic and may spread the- infection. But from the humanitarian point of view, he may be needing help. He may be starving. He may be sick. In such a case, Jie should be given food and help.

However, if he is a drug addict the police should be called and person should be transferred immediately. From the picture, the exact condition of the man is not clearly understood and hence, the exact opinion about the rationality of the incidence cannot be made.

Observe: (Text Book Page No. 103)

Question 1.
Two caricatures presenting the situations of the year 1998 and 2017 about playing on playground are given below. Observe those caricatures. Express your opinion about arising of such different situations.

Answer:
In 1998, the technology was not so much advanced as it is today. In every house, there were no computers or laptops. Mobile phones were not popular then. The children used to play games which were outdoor and physical. They used to spend quality time on the playground. They always wanted to rush to the playground after their school hours. Therefore, mothers of that time had the task to get back their children from the playground.

By 2017, the situations and the social and technological change became enormous. The constant growth of the cities also experienced the rising construction. This too resulted in loss of playgrounds. After school time, children started spending their time in mobile and computer games. The parents also became financially well-off and started providing all the amenities to the children.

Due to the internet and the computer at home, the children got hooked to these electronic media. They started spending all the available time in virtual games, Facebook, what’s app and other social media. Thus mothers, of recent times had to force their children out of the house, at least for some time, so that they can play physical games.

Two caricatures presenting the situations of the year 1998 and 2017 about playing on playground show the tremendous social change that has undergone in our society.

Observe: (Text Book Page No. 104)

Question 1.
Observe the images below. Is it rational? Why?



Answer:
In the above three pictures three incidences are shown. In the first picture (Fig. 9.3), the boy who is taking his lunch is shown. He is busy with his mobile while having his food. In second picture (Fig. 9.4), a young man is taking selfie while standing in the busy road. He is not aware of the approaching car too. In the third picture (Fig. 9.5), some men are taking pictures of the accident that has recently happened. The person is injured and bleeding. But these men-are busy in photographing him.

All the three pictures are showing irrational and improper behaviour. We should respect the food while eating. We should eat in a disciplined way. Standing in the middle of the road and taking selfie is like inviting the mishap. Selfie taken in such circumstances usually results in an accident. In the last picture, the sensitivity and the humanity to save the victim is lacking. If the victim is immediately rushed to hospital, his life can be saved. Instead of helping the victim if people are engrossed in taking pictures, then it is absolutely wrong.

Choose the correct alternative and write its alphabet against the sub-question number:

Question 1.
Our ……… has been changed to some extent in the age of technology.
(a) lifestyle
(b) habit
(c) circumstance
(d) passion
Answer:
(a) lifestyle

Question 2.
………… influence is stronger in case of adolescents.
(a) Teacher’s
(b) Father’s
(c) Relative’s
(d) Peer group
Answer:
(d) Peer group

Question 3.
Tobacco containing substances has ……….. effect on mouth and lungs.
(a) acidic
(b) alkaline
(c) carcinogenic
(d) neutral
Answer:
(c) carcinogenic

Question 4.
Persons continuously using computers and the internet become …………..
(a) courageous
(b) timid
(c) solitary
(d) criminal
Answer:
(c) solitary

Question 5.
…………. has been newly launched in Police Department.
(a) Cybercrime unit
(b) Women protection unit
(c) Senior citizen care unit
(d) Forensic unit
Answer:
(a) Cybercrime unit

Question 6.
…………. helps to improve concentration in the studies.
(a) Eatables
(b) Meditation
(c) Hobbies
(d) Sports
Answer:
(b) Meditation

Question 7.
Hobbies like rearing pet animal helps to create a …………..
(a) positive mindset
(b) negative attitude
(c) wealth
(d) concentration
Answer:
(a) positive mindset

Find the odd one out:

Question 1.
Transport facilities, Social security, Counselling, Toilets.
Answer:
Counselling. (All others are factors affecting social health. Counselling is the positive measure for mental health.)

Question 2.
Aadhaar card, PAN card, Greeting card, Credit card.
Answer:
Greeting card. (All others are important cards of personal use.)

Question 3.
What’s app, Instagram, Facebook, Textbook.
Answer:
Textbook. (All others are social media.)

Question 4.
Tobacco, Laughter club, Alcoholism, Drug abuse.
Answer:
Laughter club. (All others are addictions.)

Find out the correlation:

Question 1.
Movement against tobacco : Tata trust : : Education of slum children : …………..
Answer:
Movement against tobacco : Tata trust : : Education of slum children : Salaam Mumbai Foundation

Question 2.
Addictive substances : Drugs : : Carcinogenic (Cancer causing) substances : ………..
Answer:
Addictive substances : Drugs : : Carcinogenic (Cancer causing) substances : Tobacco

Question 3.
Radiations from cell phones : Headache : : ………….. : Hindrance to the brain development.
Answer:
Radiations from cell phones : Headache : : Alcoholism : Hindrance to the brain development.

Select the two options in the ‘B’ group related to ‘A’ group:

Question 1.

‘A’ Group	‘B’ Group
(1) Salaam Mumbai Foundation	(a) Work against alcoholism
	(b) Freedom from tobacco
	(c) Laughter club
	(d) Help to improve student’s lifestyle

Answer:
(1) Salaam Mumbai Foundation – (b) Freedom from tobacco (d) Help to improve student’s lifestyle.

Give scientific reasons:

Question 1.
Nowadays school going children suffer from mental stress.
Answer:

• These days children stay in nuclear families. Due to need for earning and also due to her career choices, mother of the house is also away for long period of time.
• The grandparents or other elders are not in the home. This makes the children alone in the house.
• At school and during studies, there is fierce competition. The modern technology like internet or mobile phones are luring the children away from their regular exercises or outdoor games.
• The wrong kind of peer pressure introduces addictive substances at the young age.
• There is insecurity in the outside world for the young children.

These facts create emotional burden on the young minds and thus they suffer from mental stress.

Question 2.
Girls are facing the problem of stress due to such gender inequality.
Answer:

• In most of the households there are many bindings on girls and excessive freedom for boys.
• Boys do not participate in the domestic duties whereas girls have compulsion for the same.
• In society too, girls have to face the problems like teasing and molestation.
• This creates insecurity among the minds of girls.
• The social change has made women independent and equal but still the male dominated society and the gender inequality persists causing more stress for young girls.

Question 3.
Consuming liquor is always bad.
Answer:

• When the liquor is produced from alcohol wrong processes can be carried out which makes the liquor highly toxic.
• It may cost the life too. Due to alcohol in the liquor, there is directly effect on the nervous system and especially on the brain.
• Other vital organs such as liver and kidneys are harmed due to alcohol.
• The lifespan of person decreases due to alcoholism.
• In students, the brain functioning is affected and the ability to memorize and think rationally is lost. The learning process becomes slow.
• Due to all these effects, there is social, mental and familial problems in the society. Therefore, consuming liquor is always bad.

Question 4.
We need to keep the PIN number of the debit card secret.
Answer:

• Debit card is used to withdraw our money from the bank account.
• During withdrawal, we have to use our PIN number.
• If this PIN number is known to anybody, he or she can withdraw all our money and loot us.
• Therefore, to prevent such financial loss, we have to keep the PIN number of the debit card secret.

Question 5.
Importance of outdoor games is unparalleled.
Answer:

• Outdoor games give good physical exercise. These games give many physical benefits.
• It improves personal discipline, interaction with fellow players and created sense of unity.
• Through play by driving away the loneliness, mental stress and depression is reduced.
• The person becomes more social.
• Therefore, it is said that the importance of outdoor games is unparalleled.

Answer the following questions:

Question 1.
What is alcoholism? What are its effects?
Answer:

• Alcoholism is the addiction to have alcohol in the form of different types of liquor. Liquor is produced from alcohol. Alcohol is in turn obtained by fermentation of different substances.
• Consuming liquor becomes an addiction for a long-term. Due to alcohol, the efficiency of nervous system and especially the brain is affected.
• Other vital organs such as kidneys and liver are adversely affected.
• Lifespan of an alcoholic decreases due to constant drinking and malnourishment.
• Especially in adolescent age if alcohol is consumed the brain functioning does not take place properly. The mental ability of memorization and learning becomes slow. There is lack of concentration in studies.
• The alcoholic person lacks the rational thinking and hence faces with social, mental and familial problems along with physical illness.

Question 2.
How the excessive use of social media and technology is proving harmful?
Answer:
Excessive use of social media and modem technology is disturbing the social health. It is also affecting physical and mental health. Increase in cybercrime take place. People waste their time by watching useless and obscene material. Violence develops by watching few weird cartoon serials. Dependency on machine rises and persons lose self-reliance.

Question 3.
Explain the importance of exercise, yoga and meditation.
Answer:

• Exercise, yoga and meditation are the ways to reduce mental and physical stress.
• In yoga various asanas and pranayama are performed. It also includes good food and discipline of the body and mind.
• Deep breathing, yogic sleep can help in the building up health.
• Meditation helps in concentration and brings positivity to the mind. Especially, the students increase the concentration in the studies.

Write short notes on the following:

Question 1.
Cybercrimes.
Answer:

• No personal information should be shared on the phone, especially the details of bank account, Aadhaar card, PAN card, credit card or debit card number, etc. Cheating persons by using this information is a greatest cybercrime.
• If PIN of any debit or credit card is known to a stranger, he or she can make fraudulent transactions.
• The PIN number and CVV number should be kept total secret. Otherwise, the bank transactions, are done using PIN without the knowledge of consumers.
• In on-line purchases, many a times consumers are cheated. In this, the consumers are shown superior items on websites but actually the inferior ones are sold to them.
• ‘Hacking of information’ is done by some programmers in which the confidential information about government, institutes and companies is obtained from internet with the help of computer programs.
• Fake Facebook accounts are opened and false information is displayed there. This is for harassing girls or financially exploiting others.
• In internet piracy, written literature, software, photos, videos, music, etc. of other persons are misused or illegally used.

Misuse of electronic media sending derogatory messages, spreading vulgar pictures and provocative statements is also a cybercrime. Very rapid exchange of information through media like email, Facebook and Whatsapp takes place these days. But we have to take care about leaking of our own important information.

However, when our personal information and phone numbers are automatically spread and reached to fraudulent people, then they commit malpractices which can hinder the function or shut of the cell phones or computers. All these are cybercrimes which are also indicative of mental health.

Question 2.
Addiction.
Answer:
(1) In adolescent age group, there is tremendous pressure of peers. This peer-group influence can be at times wrong, if the friends are not good. Instead of following advice of parents, the adolescent girls and boys tend to listen to the wrong advices of their friends.
(2) Due to lack of parental supervision, children in their early age start using tobacco, cigarette, gutkha, alcoholic drinks, drugs, etc. This may be due to peer-pressure.
(3) The children fall into the trap of addictions either due to peer-group pressure or due to false
symbol of high standard living. Sometimes they try to imitate their elders.
(4) The addictive substances are hazardous, and they cause long term effects. Some are temporarily intoxicating substances obtained from the plants. While some of the chemical ingredients in them can permanently damage the human nervous system, muscular system, heart, etc. Some tobacco like substances Eire carcinogenic in action especially on the mouth and lungs.

Complete the paragraph by choosing the appropriate words given in the bracket:

Question 1.
(lungs, heart, carcinogenic, nervous, intoxicating, hazardous, addictions, peer-group)
The children fall into the trap of …………. either due to ……….. pressure or due to false symbol of high standard living. Sometimes they try to imitate their elders. The addictive substances are ………….., and they cause long term effects. Some are temporarily ………… substances obtained from the plants. While some of the chemical ingredients in them can permanently damage the human ……… system, muscular system, …………, etc. Some tobacco like substances are ………. in action especially on the mouth and ………….
Answer:
The children fall into the trap of addictions either due to peer-group pressure or due to false symbol of high standard living. Sometimes they try to imitate their elders. The addictive substances are hazardous, and they cause long term effects. Some are temporarily intoxicating substances obtained from the plants. While some of the chemical ingredients in them can permanently damage the human nervous system, muscular system, heart, etc. Some tobacco like substances are Carcinogenic in action especiailly on the mouth and lungs.

Paragraph based questions:

1. Read the paragraph and answer the questions given below:
Social health involves your ability to form satisfying interpersonal relationships with others.
It also relates to your ability to adapt comfortably to different social situations and act appropriately in a variety of settings. Spouses, co-workers and acquaintances can all have healthy relationships with one another. Each of these relationships should include strong communication skills, empathy for others and a sense of accountability. In contrast, traits like being withdrawn, vindictive or selfish can have a negative impact on your social health. Overall, stress can be one of the most significant threats to a healthy relationship. Stress should be managed through proven techniques such as regular physical activity, deep breathing and positive self-talk.

Questions and Answers:

Question 1.
How can you be socially healthy?
Answer:
If one has ability to form satisfying interpersonal relationships with others, he or she can be socially healthy. In all social situations and settings there should be appropriate behaviour.

Question 2.
Which qualities are needed for having good social contacts?
Answer:
Strong communication skills, empathy for others and sense of accountability are the qualities needed for having good social contacts.

Question 3.
Which traits have negative impacts on social health?
Answer:
Being withdrawn, vindictive or selfish, and stressed out personality has negative impacts on the social health.

Question 4.
What are the stress management techniques?
Answer:
Regular physical activity, deep breathing and positive self-talk can be the simple stress management techniques.

Question 5.
What is the significant threat to social health of an adolescent in your opinion?
Answer:
General stress, addictions, wrong peer pressure, too much screen time, lack of parental care are threats to social health of an adolescent.

Activity based questions:

Question 1.
Fill in the boxes with the help of the given clue: (March ’19)
Continuous consumption of alcohol and tobacco material …………

Answer:
ADDICTION

Question 2.
Observe the pictures and answer the questions. (March’19)
(a) Playing games on mobile while eating is right or wrong. Justify.

Answer:
The boy taking his lunch is shown in the adjoining picture. He is busy with his mobile while having his food. His nutrition may affect due to such behavior.

(b) What do you conclude from the following picture?

Answer:
Cigarette contains carcinogenic nicotine. It should never be smoked. Similarly, always stay away from addictions such as drugs, alcohol, gutkha, etc. The pictures give message for control of addictions.

(c) Observe the following picture and state what can be the outcome?

Answer:
In picture, a young man is taking selfie while standing in the busy road. He is not aware of the approaching car too. This may cause an accident.

Question 3.
Complete the following:
Concept-diagram using factors harming the social health and based on it, answer the following questions :
(i) Tobacco products can be included in which of those factors?
(ii) How the tobacco products are harming the social health?
Answer:
(Answers are given in bold.)

(i) Tobacco products are included under addiction.
(ii) Tobacco is carcinogenic product. By its consumption personal and social health is affected on a large scale. Spitting tobacco anywhere is also common practice among tobacco chewers. This too affects public hygiene and cleanliness.

Question 4.
(9) Observe the following figure and answer the given questions: (Board’s Model Activity Sheet)

(a) What does this picture given in the textbook indicate?
(b) Explain any two causes for this problem.
(c) Describe any two measures to eradicate this problem.
Answer:
(a) Given picture indicates that person is suffering from mental problem. He is under sever depression and frustration. Person may be using the drugs.

(b) Causes of this problems are as under:

1. Nuclear families and working parents.
2. Poverty, divided family and unemployment. Addiction is major cause of this problem.

(c) Measures to eradicate this problem:

• By good communication with parents or family members harmonious relation can be re-established.
• Help from counsellors can be helpful to minimize the problem.

Question 5.
(i) Which mental illness is shown in the picture 9.5?

(ii) Which social message would you like to give through it.
Answer:
(i) The picture (figure 9.5) shows ‘insensitivity’, which is a type of human nature.
(ii)

• Instead of shooting the accident the victim should be given first aid.
• Call on 100 and 108 and seek immediate help from police and ambulance.
• Disperse the crowd and try to save life of victim by giving CPR.

Question 6.
Write, which is an inappropriate action in the picture 9.5? (Board’s Model Activity Sheet)
Answer:
The picture shows lack of sensitivity and responsibility.

Question 7.
Observe the figure and answer the questions given below.

(a) What do these figures indicate?
(b) Which gadgets can be misused for these?
(c) Give two examples of such events.
(d) Name the act amended by Government of Maharashtra to control such events.
(e) What care should be taken by a person to avoid such events?
Answer:
(a) The above figures indicate different types of cybercrime.

(b) The gadgets that are usually used for cybercrime are internet connected computers, cell phones, ATM machines, debit and credit cards, etc. Also using aadhar and PAN cards of others.

(c) (1) Bank transactions are done without the knowledge of the account holder by stealing necessary numbers or pass codes. (2) By opening the fake accounts of social media and deceiving girls, harming them psychologically by teasing them. (3) Deceiving customers by showing superior options on the internet and providing inferior ones when bought. In online shopping many may be cheated in this way.

(d) IT Act-2000 is the act enacted since 17th Oct. 2000 and amended in 2008 that has been imposed by Government of Maharashtra to control cybercrimes.

(e) To prevent cybercrimes, one has to keep vigil over bank transactions. Never reveal any details on the phone. The ATM pin number and PAN or AADHAR details should not be revealed to anyone. While at ATM machines, the pin number should be covered. Always log out from the internet after the work is over.

Projects:

Project 1.
Observe and Discuss: Observe the chart given on textbook page 101. Discuss about the relationship of various factors shown therein with the social health. (Textbook page no. 101)

Project 2.
Try This! (Textbook page no. 101) Classify your classmates into following groups depending upon the observation for a week.
1. Highly interactive.
2. Occasionally interactive.
3. Non-interactive
Make a list of the friends of each of the above three group members and also mention the group to which you belong.

Project 3.
Compare: (Textbook page no. 103) Distribute the 24 hours of your daily routine as per various duties you have observed. Make two categories as time spent on your health and time spent on other responsibilities and compare both the categories.

Project 4.
Internet is my friend: Visit the website www.cyberswachhtakendra.gov.in

Balbharti Maharashtra State Board Class 10 Political Science Solutions Chapter 4 Social and Political Movements Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 10 Political Science Solutions Chapter 4 Social and Political Movements

Question 1.
Choose the correct option from the given options and complete the sentences.
(1) ………………………….. is the main demand of farmers movement.
(a) Right to cultivate on the forest land
(b) To get the right price for agricultural product
(c) Protection of consumers
(d) Building of dams
Answer:
(b) To get the right price for agricultural products

(2) To increase agricultural production and become self-sufficient with regard to food grains ………………………….. was initiated.
(a) Water revolution
(b) Green revolution
(c) Industrial revolution
(d) White revolution
Answer:
(b) Green revolution

Question 2.
Explain the concepts.
(1) Tribal movement
Answer:

• Tribal community was always dependent on forest wealth for their living.
• The British had prohibited the tribals from making use of forest wealth to earn their livelihõod
• Kolam, Gond, Santhal, Koli, Bhilla, Munda Tribals of different parts of India revolted against the British.
• Even after independence their problem to earn a livelihood is not solved. Their right on the forest land, to gather forest products and to cultivate on forest land is not yet recognised.

Therefore, for these demands, Tribal Movement is active in many parts.

(2) Labour movement
Answer:

• Industries in public and private sector like textile mills, railway companies started in India in the latter part of the nineteenth century.
• Due to industrialisction, a large number’ of labour force came into existence.
• Thiš led to lot of labour issues. In 1920, All India Trade Union. Congress was established to solve their problems.
• Many unions were formed after independence. The Trade Union Movement was very effective from 1960 tifi 1980s.
• After 1980s trade union movement lost its momentum and slowly disintegrated. Globalization gave a final blow to the movement.

Question 3.
Answer the following questions in brief.
(1) Explain the activities/role/functions of environmental movement.
Answer:
(i) Role : The environment movement rias played a key role in –

• Creating public awareness about the importance of balance in environment through television, newspapers, and other mediums.
• Opposing developmental projects with environmental concerns.

(ii) Functions : The function of the environment movement is to make efforts silently or rigorously to protect natural areas through afforestation, recycling or pollution control. Forest department and the pollution board are actively involved and extend support by making stringent laws to book the culprits.

(iii) Activities : Different activities are conducted to promote the environment movement:

• Environmental degradation has become a serious issue not only in India but also in the world.
• The issues of degradation was discussed at. Rio-de-Janeiro, Paris and Kyoto Conferences.
• Even in India many movements are active for conservation of the environment like the Chipko movement, Appiko movement ana Vanmahatsov.

(2) Explain the nature of farmers movement in India.
Answer:

1. The Indian farmers organised themselves in pre-independence era to fight against the anti-agricultural policies of the colonial British rulers.
2. The farmers were inspired by the thoughts of Mahatma Phule, Justice Ranade and Mahatma Gandhi. They organised satyagraha against revenue collection in Bardoli and Champaranya.
3. Farmers’ movement slowed down because of tenancy laws under land reforms. Green revolution failed to improve conditions of the poor farmers.
4. Farmers’ movement gained momentum with demands like, appropriate price for agricultural products, debt relief and debt cancellation after recommendations from Swaminathan Commission.

(3) For which reforms were the women’s movement in the pre-independence period fighting?
Answer:
In the pre-independence period women’s movement were working for the following reforms :

• Eliminating injustice against women.
• To put an end to the exploitation of women and help them lead a respectful and dignified life.
• They should be able to participate actively in social life.
• To end the practices like Sati, child marriage, polygamy and bring about reforms such as widow remarriage and women’s education.

Question 4.
State wheather the following statements are true or false. Give reasons for your answer.
(1) Movements are important in a democracy.
Answer:
The above statement is True.

• People organise themselves and start a movement to solve social issues.
• Leaders and activists provide all the information regarding those issues to the government.
• The government takes, notice of the problems because of the movement.
• Some movements aim at opposing some policies of the government and certain decisions. This is the most recognised method of protest in democracy.

Hence, movements have great importance in democracy

(2) Movements do not need a strong leadership.
Answer:
The above statement is False.

• The success of any movement depends on leadership. The movement remains active because of the strong leader.
• The decisions regarding the objective of the movement, programme of action, strategy of agitation are decided and taken by the leader.
• Firm leadership has a wide reach. They can get public support making the movement very effective. So, the need of a strong leadership is utmost essential.

(3) Consumer movement came into existence.
Answer:
The above statement is True.

• The consumers faced different problems because of changing economy and social system.
• Adulteration increased the cost of products and faulty weights and measures are some of the problems faced by the consumers.
• To protect the consumers from such frauds the Consumer Protection Act was passed in 1986.
• The Consumer Protection movement was started to create awareness among the consumers about their rights and their safety.

Project
(1) Collect the news in the newspapers about various activities of social movements.
(2) Write a report on movements in your area which are working to resolve general problems.
(3) Prepare a format of a complaint you will submit under consumer protection act if you are cheated in purchase of vegetables or grains
Answer:

Memory Map

Question 5.
Choose the correct option from the given options and complete the sentences :
(a) In …………………., movements have more importance.
(a) socialist rule
(b) dictatorship
(c) democracy
(d) communist rule
Answer:
(c) democracy

(b) In democracy, Right to …………………. is considered an important right.
(a) rehabilitate
(b) pursue questions
(c) behave with control and responsibility
(d) protest
Answer:
(d) protest

(c) is the objective of Green Revolution.
(a) To stop degradation of environment
(b) Protection of the forests
(c) Increase in agricultural output
(d) To stop the felling of trees.
Answer:
(c) Increase in agricultural output.

(d) The trade union movement in India has background of ………………… .
(a) freedom struggle
(b) globalisation
(c) prestigious past
(d) industrialisation
Answer:
(d) industrialisation

(e) In 1899, …………………. workers called for a strike.
(a) railway
(b) mill
(c) handloom
(d) rice mill
Answer:
(a) railway

(f) Dr. Rajendrasinh Rana had brought about …………………. in Rajasthan.
(a) White Revolution
(b) Water Revolution
(c) Green Revolution
(d) Consumer Revolution
Answer:
(b) Water Revolution

(g) Dr. Rajendrasinh Rana is known as the …………………. of India.
(a) Farmer man
(b) environment affectionate
(c) Man of the Millennium
(d) Waterman
Answer:
(d) Waterman

(h) Tribals in Bihar revolted against the British under the leadership of ………………… .
(a) Rajendrasinh Rana
(b) Birsa Munda
(c) Umaji Naik
(d) Kajarsingh
Answer:
(b) Birsa Munda.

(i) Swadeshi movement is an important …………………. movement.
(a) political
(b) social
(c) economic
(d) cultural
Answer:
(c) economic

(j) …………………. is one of the problems faced by consumers.
(a) Cancellation
(b) Malnutrition
(c) Adulteration
(d) Transportation
Answer:
(c) Adulteration

(k) The main demand of the farmer’s movement was to accept suggestions of the …………………. Commission.
(a) Sunderlal Bahuguna
(b) Verghese Kurien
(c) Swaminathan
(d) Kothari
Answer:
(c) Swaminathan

(l) In 1986, …………………. Act came into force.
(a) Consumer Protection
(b) Women Empowerment
(c) Child Marriage
(d) Environment Protection
Answer:
(a) Consumer Protection

(m) The post-1980 movements are called ………………… .
(a) New
(b) Neo-social
(c) Broad
(d) Globalisation
Answer:
(b) Neo-social

(n) …………………. was established in 1920.
(a) Farmer’s Organization
(b) Bhartiya Kisan Union
(c) All India Trade Union Congress
(d) All India Kisan Sabha
Answer:
(d) All India Trade Union Congress.

Question 6.
Explain the following statements by giving reasons :
(a) Political parties can concentrate on one particular issue.
Answer:
The above statement is False.

• Political parties contest elections to solve problems of common people.
• Parties have to take into consideration all matters from public cleanliness to roads to space research. They have to have a national perspective and take decisions.
• Political parties should have programmes for the development of all the sections of society like youth, senior citizens, businessmen, women, farmers and labourers.
• This – means that political parties cannot concentrate on just one particular issue.

(b) People’s active participation is expected in the movement.
Answer:
The above statement is True.

• A. movement is started to solve issues of public interest.
• People offer support to the movements which are related to their cause or a particular issue.
• Deciding upon the issues of the people a programme is decided and a group is formed.

(c) Dr. Rajendrasinh Rana is called the Waterman of India.
Answer:
The above statement is True.

• Dr. Rajendrashinh Rana built thousands of ‘Johads’ in Rajasthan.
• He revived many rivers in the desert region of Rajasthan.
• He formed an organisation – “Tarun Bharat Sangh” which built eleven thousand Johads to harvest water. .
• He started a campaign for Water conservation, revival of rivers, forest conservation and wildlife conservation.
• He worked continuously for this cause for 31 years building 11 thousand johads bringing about water revolution in Rajasthan. Therefore, is called the Waterman of India.

Question 7.
Explain the concept :
(a) Movement:
Answer:

1. When people organise themselves to resolve a certain issue it is called a movement.
2. Movements increase the participation of people in social life.
3. Movements are for public welfare and to solve issues. The aim of any movement is not only to pressurize the government but also to oppose its decision or policies.
4. A movement is started for different reasons like religious, social, cúltural, protection of the environment, ill practices and traditions.

(b) Public Interest Litigation:
Answer:

1. A litigation is filed if an individual or group feels that fundamental rights which are enshrined in the Constitution are undermined by the government.
2. To safeguard human rights, citizens can file a litigation in High Court or Supreme Court. Such a litigation is known as Public Interest Litigation.
3. Public Interest Litigation is filed for problems such as pollution, government avoiding public works and for social problems such as violence, discrimination and ostracising someone.
4. It is the most effective way of seeking justice.

(c) Environment Movement :
Answer:

• Different activities are conducted to promote the environment movement in India.
• Environment degradation has become a serious issue not only in India but also all over the world.
• The issues of degradation were discussed at Rio-de-Janeiro, Paris and Kyoto Conferences.
• Even in India many movements are active for conservation of the environment like the Chipko movement, Appika movement and Vanmahatsov.

Question 8.
(A) Complete the graphical representation :

(1)

Answer:

(2)

Answer:

(3)

Answer:

(4)

Answer:

(B) Explain the events in Trade Union Movement:

Answer:

Question 9.
Answer the following questions in brief:
(a) Explain the features of a movement.
Answer:

• A movement is a collective action which has active participation or support of the people.
• People take up a particular issue and organise themselves.
• A movement requires strong leadership. A strong leader makes the movement effective.
• If people feel connected to the issue, then they extend their support to the movement.

(b) What are the demands of Trade Union Movement?
Answer:
The Trade Uniin Movement makes demands regarding following issues :

• Contract labour and unstable employment..
• financial insecurity and unfavourable conditions at workplace.
• Unlimited working hours and health hazards.
• No protection of labour laws.

(c) How did the objectives of women’s movement change after independence?
Answer:

1. In the pre-independence era the aim of the women’s movement was to put an end to the unjust practices against women and end their exploitation.
2. After independence, the aim of their movement changed because they realised that though the Constitution had given equal rights both to men and women in practice they were never considered equal.
3. The objective of the women’s movement was to achieve freedom in real sense, i.e. they should be treated as human beings and should get equal rights and to live a dignified life.

(d) Which issues were taken up by the women’s movement after independence?
Answer:
Many issues were taken up by the women’s movement for welfare of the women after independence. Some are:

• Health and education of women
• financial independence
• Social security
• To be treated as human beings and have a status and prestige.

(e) Which issues are handled through movements?
Answer:
Movements arise out of public issues, which could be social, political, economic and religious.

1. To protect the rights of the citizens like voting, freedom and for similar issues, political movements are organised.
2. financial security, minimum wages, employment, insistence on an indigenous product are the reasons for economic movement.
3. Social and religious movements are organized to eliminate ill practices like untouchability, entry of women in temples,’ discrimination and social issues.
4. Movements are organised to raise voice against injustice done to a particular region, language and for issues like cleanliness, environment and movements for development like Green revolution and White resolution.

(f) Which movements started in India are actively working for rehabilitation of the displaced and to secure their livelihood?
Answer:
People who got displaced started this movement for different reasons. Some movements lasted for short time while some lasted long.

• “Narmada Bachao Andolan” was a popular movement.
• People living in Maharashtra and Gujarat continued it for 28 years.
• People in the Sindhudurg district who got displaced due to the Talamba dam started movement for rehabilitation. It lasted for 32 years.
• Farmers who got displaced because of Pune-Nagpur highway or for the planned Purandar airport launched movements on a large scale. Such movements are going on all over India.

(g) Name the policies started by the government for the welfare of farmers and landless labourers?
Answer:
The government has started the following policies for the welfare of the farmers and landless labourers :

• National agriculture policy
• Crop insurance scheme (FASAL Bima Yojana)
• Jalyukt Shivar
• Indira Gandhi Niradhar (old), landless, destitute women farm labour scheme.
• Neem Coated Urea.
• Name the policies started by the government for the welfare of farmers and landless labourers.

(h) Name the movements started by Mahatma Gandhi, Mahatma Phule, Sant Gadge Maharaj and Dr. Babasaheb Ambedkar.
Answer:

• Mahatma Phule laid the foundation of the movement for education of women and social equality.
• To stop the practice of widow tonsure he called for a strike of barbers in Mumbai.
• Mahatma Gandhi adopted the technique of satyagraha and started the movement for farmers in Champaranya and Kheda.
• He also started the Non-cooperation Movement and Civil Disobedience Movement..
• Sant Gadge Maharaj started the cleanliness campaign.
• Dr. Babashaeb Ambedkar launched satyagraha to allow untouchables to use water from a public tank in Mahad..
• He also led the movement in Nashik for Dalits so that they could get entry into the Kalaram temple.

(i) All movements have ideologies. (Discuss : Textbook page 92)
Answer:

• Even though movements are launched for social welfare there is always an ideology behind every movement.
• The scope of movements against child marriage or dowry prohibition is not limited to oppose the social evil practice but have wider aim of social reformation.
• The movements started against female foeticide ‘Beti Bachao Beti Padhav’, violence against women and to empower women had objectives to achieve equal social status for women and their protection.
• Movements like cleanliness campaign, Chipko Andolan, Save Trees aim not only at environment protection but also aim at saving humanity.
• These movements have faith in democratic values like equality and brotherhood and humanity. This shows all movements have ideologies.
• Generally the movements are devoted to one particular issue but have an ideology behind them.
• For example movements against child marriage, dowry believe in values of democracy, women empowerment and social equality.
• Sometimes some movements gradually get transformed into political parties.

Question 10.
Give your opinion :
(a) Do you think, if all the movements co-ordinate with each other, the result will be more effective?
Answer:

• Our society has witnessed many movements from pre-independence times.
• If all these movements co-ordinate with each other they will be definitely, effective.
• With each other’s cooperation they can work together to find the root cause of the problem and also find a solution.
• The manpower will not get divided. The work will get divided and that would save time and energy to a great extent.
• The movement will be more effective.

(a) On which issues does the ‘Sons of the Soil’ movement in India insist? (Discuss : Textbook page 93)
Answer:
People migrate for various reasons within the country. They create lot of problems in their newly adopted homeland which give rise to the ‘Sons of the Soil’ movement. The main reasons for the movement are :

• Sons of the Soil, i.e. local people lose out on employment opportunities.
• They are deprived of their jobs.
• Their land is confiscated.
• Housing becomes expensive.
• The migrants pose a threat to the language and culture of local people.
• Sons of the Soil lose economic monopoly as well as political influence.

Balbharti Maharashtra State Board Class 10 Science Solutions Part 2 Chapter 2 Life Processes in Living Organisms Part – 1 Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 10 Science Solutions Part 2 Chapter 2 Life Processes in Living Organisms Part – 1

Question 1.
Fill in the blanks and explain the statements.
a. After complete oxidation of a glucose molecules, ……….. number of ATP molecules are formed.
Answer:
After complete oxidation of a glucose molecules, 38 number of ATP molecules are formed.

b. At the end of glycolysis, ……………… molecules are obtained.
Answer:
At the end of glycolysis, pyruvate molecules are obtained.

c. Genetic recombination occurs in ………… phase of prophuse of meiosis-I.
Answer:
Genetic recombination occurs in pachytene phase of prophase of meiosis-I.

d. All chromosomes are arranged parallel to equatorial plane of cell in …………. phase of mitosis.
Answer:
All chromosomes are arranged parallel to equutorial plane of cell in metaphase phase of mitosis.

e. For formation of plasma membrane, phospholipid molecules are necessary.
Answer:
For formation of plasma membrane, …………… molecules are necessary.

f. Our muscle cells perform ……………… type of respiration during exercise.
Answer:
Our muscle cells perform anaerobic type of respiration during exercise.

Question 2.
Write definitions.
a. Nutrition.
Answer:
Nutrition: The process of taking nutrients in the body and utilizing them by an organism is known as nutrition.

b. Nutrients.
Answer:
Nutrients: The substances like carbohydrates, proteins, lipids, vitamins, minerals etc. which are components of the food are called nutrients.

c. Proteins.
Answer:
Proteins: Protein is a macromolecule which is formed by many amino acids which are joined by peptide bonds.

d. Cellular respiration.
Answer:
Cellular respiration: Oxidation of glucose and other food components which takes place inside the cell in presence or absence of oxygen, is known as cellular respiration.

e. Aerobic respiration.
Answer:
Aerobic respiration: Cellular respiration taking place in presence of oxygen is known as aerobic respiration.

f. Glycolysis.
Answer:
Glycolysis: The process occurring in the cell where a molecule of glucose is oxidized in step by step process forming two molecules of each of pyruvic acid, ATP, NADH₂ and water, is called glycolysis.

Question 3.
Distinguish between
a. Glycolysis and TCA cycle
Answer:
Glycolysis:

• The process of glycolysis occurs in the cytoplasm of the cell.
• In glycolysis, one molecule of glucose is oxidized step-by-step to produce two molecules each of pyruvic acid, ATP, NADH₂ and water.
• Glycolysis can take place in both aerobic and anaerobic respiration.
• The first step in cellular respiration is glycolysis where glucose is converted into pyruvate.
• Two molecules of pyruvate are obtained in glycolysis.
• Two molecules of ATP are used up in glycolysis.
• Four molecules of ATP are produced in glycolysis.
• CO2 is not produced during glycolysis.

TCA cycle:

• TCA cycle takes place in mitochondria.
  In TCA cycle, molecule of acetyl-co-A is completely oxidized and in the process CO₂, H₂O, NADH₂, FADH₂ and ATP is produced.
• TCA cycle takes place only during aerobic respiration.
• The second step in cellular respiration is TCA cycle.
• Pyruvate is converted into CO₂ and H₂O during TCA cycle.
• ATP molecules are not used up in TCA cycle.
• Two molecules of ATP are produced in TCA cycle.
• CO₂ is produced in TCA cycle.

b. Mitosis and meiosis.
Answer:
Mitosis:

• In mitosis the chromosome number does not change. Diploid cells remain diploid, without change.
• One cell gives rise to two daughter cells in mitosis.
• Karyokinesis of mitosis has four stages, viz. prophase, metaphase, anaphase and telophase.
• Prophase of mitosis is not lengthy.
• Genetic recombination does not happen in mitosis as there is no crossing over.
• Mitosis is essential for growth and development.
• Mitosis takes place both in somatic cells and germinal cells.

meiosis:

• In meiosis, the chromosome number is reduced to half. The diploid cells become haploid.
• One cell gives rise to four daughter cells in meiosis.
• Meiosis has two major stages, viz. meiosis-I and meiosis-II. Each is further subdivided into prophase, metaphase, anaphase and telophase.
• Prophase of meiosis-I is very lengthy.
• Genetic recombination takes place in homologous chromosomes as there is crossing over during prophase-I.
• Meiosis is essential for formation of gametes in sexual reproduction.
• Meiosis takes place in only germinal cells. It does not take place in somatic cells.

c. Aerobic and anaerobic respiration.
Answer:
Aerobic respiration:

• Oxygen is required for aerobic respiration.
• Aerobic respiration takes place in nucleus as well as in cytoplasm.
• At the end of aerobic respiration CO₂ and H₂O is formed.
• Energy is produced in large amount in aerobic respiration.
• Glucose is completely oxidized in aerobic respiration.
• 38 molecules of ATP are formed during aerobic respiration.
• Chemical reaction:
  C₆H₁₂O₆ + 6O₂ → 6H₂O + 6 CO₂ + 686 Kcal

Anaerobic respiration:

• Oxygen is not required for anaerobic respiration.
• Anaerobic respiration occurs only in the cytoplasm.
• At the end of anaerobic respiration CO₂ and C₂H₅OH are formed.
• Energy is produced in lesser amount in anaerobic respiration.
• Glucose is incompletely oxidized in anaerobic respiration.
• 2 molecules of ATP are formed during anaerobic respiration.
• Chemical reaction:
  C₆H₁₂O₆ → 2 C₂H₅OH + 2 CO₂ + 50 Kcal

Question 4.
Give scientific reasons.
a. Oxygen is necessary for complete oxidation of glucose.
Answer:

1. When glucose is completely oxidized in aerobic cellular respiration, it produces 38 molecules of ATP.
2. In cellular respiration, three processes take place one after the other, these are glycolysis, Krebs cycle and electron transport chain reactions.
3. In absence of oxygen only glycolysis can occur but further two reactions will not take place.
4. If glycolysis occurs in absence of oxygen, it produces alcohol.
5. By anaerobic glycolysis only two molecules of ATP are produced.
6. This results in less energy supply to the body. Therefore, oxygen is necessary for complete oxidation of glucose.

b. Fibres are one of the important nutrients. (Board’s Model Activity Sheet)
Answer:

1. Fibres are indigestible substance.
2. They are thrown out along with other useless and undigested matter.
3. This aids in egestion. Some fibres also help in digestion of other substances.
4. Green leafy vegetables, fruits, cereals, etc. are considered as important in diet as they supply nutritious fibres.
5. Thus, fibres are considered as one of the important nutrients.

c. Cell division is one of the important properties of cells and organisms.
Answer:

1. Cell division is very essential for all the living organisms.
2. The growth and development is possible only due to cell division.
3. The emaciated body can be restored only through the cell division which adds new cells.
4. Offspring is produced only through the cell division that take place in parents.
5. In asexual reproduction, mitosis helps to give rise to new generation.
6. In sexual reproduction, meiosis helps to form haploid gametes.
7. All such functions show that cell division is one of the important properties of cells and organisms.

d. Sometimes, higher plants and animals too perform anaerobic respiration.
Answer:

1. When there is deficiency of oxygen in the surrounding, the aerobic respiration is not possible.
2. In such case, to survive, higher plants switch over to anaerobic respiration.
3. In some animal tissues in case of oxygen deficiency cells perform anaerobic respiration.

e. Krebs cycle is also known as citric acid cycle.
Answer:

1. Sir Hans Kreb proposed this cycle and hence it is called Krebs cycle.
2. These are series of cyclic chain reactions which begins with acetyl-coenzyme-A molecules which act with molecules of oxaloacetic acid.
3. The reactions are catalysed with the help of specific enzymes.
4. The first molecule formed in this reaction is called citric acid. Therefore, Krebs cycle is also called citric acid cycle.

Question 5.
Answer in detail.
a. Explain the glycolysis in detail.
Answer:

• Carbohydrates are converted to glucose after the process of digestion is completed. The oxidation of glucose for releasing energy is called glycolysis which takes place in cytoplasm.
• Glycolysis can occur in presence of oxygen or without oxygen too. The first type of glycolysis takes place in aerobic respiration and the second type is in anaerobic respiration.
• In aerobic respiration, there is step-wise oxidation of glucose molecule forming two molecules each of pyruvic acid, ATP, NADH₂ and water.
• Later the pyruvic acid formed in this process is converted into molecules of Acetyl-Coenzyme-A along with two molecules of NADH₂ and two molecules of CO₂.
• During anaerobic respiration along with glycolysis there is fermentation too. This is incomplete oxidation of glucose and thus it results in formation of lesser energy.
• The process of glycolysis was discovered by Gustav Embden, Otto Meyerhof, and Jacob Parnas. Therefore, in their honour, glycolysis is also called as Embden-Meyerhof-Parnas pathway (EMP pathway). For the discovery they had performed experiments on muscles.

b. With the help of suitable diagrams, explain the mitosis in detail.
Answer:
(1) There are two stages of mitosis. These are
(a) Karyokinesis or nuclear division and
(b) Cytokinesis or cytoplasmic division. Karyokinesis takes place in further four phases, viz prophase, metaphase, anaphase and telophase.



(a) Karyokinesis:
(i) Prophase: During prophase, condensation of chromosomes starts. The thin and thread like chromosomes start thickening. They are seen with their pair of sister chromatids. In animal cells the centrioles are seen to duplicate and move to opposite poles of the cell. Nuclear membrane and nucleolus disappear.

(ii) Metaphase: Chromosomes complete their condensation and each one is seen with its sister chromatids. The chromosomes are seen in equatorial plane of the cell. The spindle fibres are formed from polar region, where centrioles are present, and they attach themselves to the centromere of each chromosome. Nuclear membrane now disappears completely.

(iii) Anaphase: The centromeres of the chromosomes now divide forming two daughter chromosomes. The spindle fibres pull apart the chromosomes from equatorial region to the opposite poles. Chromosomes moving to the poles appear like bunch of bananas. One set of chromosomes reach each pole by the end of the anaphase.

(iv) Telophase: Telophase is reverse of events that occurred in prophase. The thickened chromosomes decondense. They again assume the thin and thread like appearance. Nuclear membrane and nucleolus appear again. The spindle fibres are completely lost. The cell looks as if it has two nuclei in one cytoplasm.

(b) Cytokinesis: In animal cells a notch develops in the middle of the cell. This notch goes on deepening down and later the cytoplasm divides into two. In plant cells, cell plate formation takes place and then cytokinesis takes place.

c. With the help of suitable diagrams, explain the five stages of prophase-I of meiosis.
Answer:



Prophase-I: Prophase – I of meiosis is much longer phase of the meiosis.
It is subdivided into 5 substages, namely leptotene, zygotene, pachytene, diplotene, and diakinesis.
(1) Leptotene: Initially the chromosomes start condensation and they become compact during leptotene.

(2) Zygotene: In zygotene, homologous chromosomes start pairing. This pairing is called synapsis. The structure called synaptonemal complex develops to hold chromosomes in place during this pairing. Each chromosome’s chromatid arm divides and forms structure called bivalent or tetrad.

(3) Pachytene: During pachytene stage, crossing over of non-sister chromatids of homologous chromosomes takes place. Genetic recombination is produced due to such exchange. The homologous chromosomes still remain paired together at the sites of crossing over.

(4) Diplotene: During diplotene, synaptonemal complex dissolves and the homologous chromosomes of the bivalents separate except at the point of crossing over. Thus, it looks like X-shaped structures called the chiasmata.

(5) Diakinesis: The last phase of prophase is for termination of chiasmata. The spindle fibres originate, and the cross-over homologous chromosomes are now separated. The nucleQlus disappears, and the nuclear envelope breaks down.

d. How do all the life processes contribute to the growth and development of the body?
Answer:

1. Different systems work in co-ordination with each other in the body of the living organisms. In human body the homoeostasis is very advanced.
2. Digestive system, respiratory system, circulatory system, excretory system, nervous system and all the external and internal organs in the bodywork independently but in coordination with each other.
3. The digested and absorbed nutrients of the food are transported to various cells with the help of circulatory system due to pumping of the heart. Simultaneously, the oxygen absorbed in the blood by lungs is also transported to each cell by RBCs.
4. Mitochondria in every cell brings about oxidation of nutrients and produce energy required for all of these functions.
5. The control is exercised by the nervous system on all these actions. This keeps the organism alive and helps in growth and development of the same.

e. Explain the Krebs cycle with reaction.
Answer:

• Krebs cycle was proposed by Sir Hans Kreb. This cycle is named after him. It is also called tricarboxylic acid cycle or citric acid cycle.
• The acetyl-coenzyme-A molecules enter the mitochondria located in the cytoplasm.
• They participate in the chemical reactions taking place in Krebs cycle.
• In the cyclic chemical reactions, acetyl- coenzyme-A is completely oxidised
• It yields molecules of CO₂, H₂O, NADH₂, FADH₂ and ATP upon complete oxidation.

Question 5.
How energy is formed from oxidation of carbohydrates, fats and proteins?
Correct the dagram below.

Answer:
(1) First of all the dietary carbohydrates are digested in the digestive system with the help of various enzymes and converted into glucose. Similarly, proteins are converted into amino acids and fats are broken down into fatty aid and glycerol (alcohol).

(2) Oxidation of carbohydrates takes place during cellular respiration. Glucose is oxidized by three steps during aerobic respiration, viz. glycolysis, tricarboxylic acid cycle or Krebs cycle and electron transfer chain.

(3) From one molecule of glucose two molecules of each pyruvic acid, ATP, NADH₂ and water are formed during glycolysis. Pyruvic acid which is formed in this process is converted into Acetyl-Coenzyme-A along with release of two molecules each of NADH₂ and CO₂.

(4) In the next step, i.e. in TCA cycle, molecules of Acetyl-Co-A enter the mitochondria and a cyclic chain of reactions take place. Acetyl part of Acetyl- Co-A is completely oxidized through this cyclical process. The molecules CO₂, H₂O, NADH₂, FADH₂ are released in this process.

(5) In third step, i.e. in ETC reaction, NADH₂ and FADH₂ formed during first two steps are used for obtaining ATP molecules. 3 molecules of ATP are obtained from each NADH₂ molecule and 2 molecules of ATP from each FADH₂.

(6) Thus, one molecule of glucose upon complete oxidation in presence of oxygen yields 38 molecules of ATP. This is how from carbohydrates, energy is obtained.

(7) If carbohydrates are insufficient in diet, then proteins or lipids are used for energy production. Fatty acids derived from fats and amino acids derived from proteins are converted into Acetyl- Co-A. Acetyl-Co-A once again can yield energy through TCA cycle.

Corrected diagram:

Project:
With the help of information collected from internet, prepare the slides of various stages of mitosis and observe under the compound microscope.

Can you recall? (Text Book Page No. 12)

Question 1.
How are the food stuffs and their nutrient contents useful for body?
Answer:
The food stuffs are digested and converted into soluble nutrients. These nutrients are carried by blood to every cell of the body. The oxygen inhaled at the time of respiration is also carried to every cell. In the body cells, this oxygen carries out oxidation of nutrients and thus energy is produced. The energy helps the body to carry out all its functions. The nutrients help in the growth and development of the body.

Question 2.
What is the importance of balanced diet for body?
Answer:
Balanced diet has carbohydrates, proteins, fats, vitamins and minerals in the right proportion. Each nutrient carries a specific important function. In balanced diet all these nutrients are in right proportion. Since balanced diet is required for energy and nutrition, it is very important to maintain our health.

Question 3.
Which different functions are performed by muscles in body?
Answer:
There are three 4ypes of muscles in our body. The voluntary muscles bring about all the movements according to our will. Involuntary muscles bring about all vital activities of the body. The visceral organs are under the control of involuntary muscles. The cardiac muscles control the movements of heart. Carbohydrates and proteins are stored in muscles.

Question 4.
What is the importance of digestive juices in digestive system?
Answer:
Digestive juice contains different enzymes. Enzymes act as catalysts and bring about the chemical reactions at faster pace. The digestive juices of stomach make pH of digestive tract acidic while that of intestinal juice make it alkaline.

Question 5.
Which system is in action for removal of waste materials produced in human body?
Answer:
Excretory system helps in the removal of nitrogenous waste materials produced in the human body.

Question 6.
What is the role of circulatory system in energy production?
Answer:
Due to circulatory system, glucose from digestive system and oxygen from respiratory system is transported to every cell. Red blood cells carry the oxygen as the blood is pumped by the heart. In every cell with the help of oxygen, glucose molecules yield the energy by the process of oxidation.

Question 7.
How are the various processes occurring in the human body controlled? In how many ways?
Answer:
The nervous system and the endocrine system brings about control by nervous and chemical coordination in the body. Due to such coordination different functions of the body are carried out in sequential and controlled manner.

Use your barain power:

Question 1.
Many players are seen consuming some food stuffs during breaks of the game. Why may be the players consuming these food stuffs? (Text Book Page No. 12)
Answer:

1. Players require energy in greater amount.
2. They perspire heavily at the time of game or sport which results in the loss of water and electrolytes from their body.
3. This may affect their performance in sport. To prevent such unfavourable effect, they are given, juices or drinks.
4. This helps them to restore the balance of water and electrolytes in their body. It also gives enhanced energy required for the performance.

Question 2.
Many times, we experience dryness in mouth. (Text Book Page No. 17)
Answer:

1. In our body there is 65-70% water. This proportion is always maintained.
2. Sometimes we lose lots of water either through perspiration or due to unavailability of water for a long time. In such situations, we experience dryness in our mouth.
3. Dryness is a natural feeling which creates urge in us to drink water, thereby the proportion of water in the body is brought back to its normal levels.

Question 3.
Oral rehydration solution (Salt-sugar- water) is frequently given to persons experiencing loose motions. (Text Book Page No. 17)
Answer:

1. Loose motions cause lot of loss of water from the body.
2. This may result in dehydration. This can be lethal if ignored.
3. Especially in case of young children this is a very serious fatal problem.
4. Thus, to bring back the normal proportion of water and electrolytes, oral rehydration solution or ORS is given to the patient who suffers from loose motions.

Question 4.
We sweat during summer and heavy exercise. (Text Book Page No. 17)
Answer:

1. During summer, the environmental temperatures are high.
2. This causes rise in our body temperature. Exercising also cause rise in the temperature. But since we can regulate our body temperature to a constant level, the sweat, glands g6t automatically stimulated.
3. This induces perspiration.
4. The sweat evaporates and causes fall in the body temperature. Thus, for regulation of body temperature, we sweat during summer or even after heavy exercise.

Question 5.
What do you mean by diploid (2n) cell? (Text Book Page No. 20)
Answer:

• The cells in which chromosome number is double are known as diploid cells.
• Male and female gametes unite together in the process of fertilization. Their chromosomes mix together in the zygote, therefore, the chromosome number is always diploid.
• E.g. Diploid chromosome no. in human beings is 46. We hate 46 chromosomes in each of our body cells.

Question 6.
What do you mean by haploid (n) cell? (Text Book Page No. 20)
Answer:

• The cells with only one set of chromosomes is known as haploid cell.
• At the time of sexual reproduction, there is meiosis. In meiosis chromosome number of the parental germ cells are reduced to half. Therefore, gametes are haploid.
• The haploid chromosome number (n) in human beings is 23.
• Sperm and ovum both are haploid carrying 23 chromosomes each.

Question 7.
What do you mean by homologous chromosomes? (Text Book Page No. 20)
Answer:

• Every species has definite number of chromosome pairs in their diploid cells.
• In every pair, the two chromosomes are alike in shape, type and genes located over them.
• Such chromosomes are called homologous chromosomes.
• E.g. In human diploid cell, pair of chromosome no. 1 shows chromosome no. 1 from mother and chromosome no. 1 from father. These two chromosomes are homologous to each other.

Question 8.
Whether the gametes are diploid or haploid? Why? (Text Book Page No. 20)
Answer:
The cells that give rise to gametes are diploid (2n). But by meiosis they give rise to gametes which are haploid (n). Two haploid gametes undergo fertilization and the zygote formed becomes once again diploid (2n).

Question 9.
How are the haploid cells formed? (Text Book Page No. 20)
Answer:
Diploid cells undergo meiosis, which is a reduction division. In this way haploid cells are formed.

Question 10.
What is the importance of haploid cells? (Text Book Page No. 20)
Answer:

1. The gametes that take part in the sexual reproduction should be haploid.
2. Otherwise the chromosome number will not be maintained at constancy. E.g. Parents have 2n = 46 chromosomes in their cells.
3. If meiosis does not take place in them, the gametes formed will also contain 46 chromosomes.
4. The resultant offspring will have 46 + 46 = 92 chromosomes.
5. Such skewed number will produce large scale abnormalities.
6. But due to meiosis, the gametes formed are haploid and thus the chromosome number is maintained constant for every species. Gametes are haploid cells, this is the most important fact.

Internet is my friend. (Text Book Page No. 17)

Collect information.
(a) What are symptoms of diseases like night blindness, rickets, beriberi, neuritis, pellagra, anaemia, scurvy?
Answer:

Disease	Symptoms
Night blindness	Near sightedness, or blurred vision when looking at faraway objects Cataracts, or clouding of the eye’s lens. Inability to see in dark. Sometimes blindness.
Rickets	Weak and soft bones Stunted growth In severe cases, skeletal deformities.
Beriberi	Decreased muscle function, particularly in the lower legs. Tingling or loss of feeling in the feet and hands. Pain Mental confusion, difficulty in speaking Vomiting Involuntary eye movement, paralysis.
Neuritis	Numbness in hands and feet Tingling sensation, sharp, jabbing, throbbing, freezing or burning pain. Extreme sensitivity to touch. Lack of coordination and falling.
Pellagra	Delusions or mental confusion. Diarrhoea and nausea Inflammed mucous membrane. Scaly skin sores.
Anaemia	Fatigue and loss of energy Unusually rapid heartbeat, particularly with exercise Shortness of breath and headache, particularly with exercise Difficulty in concentrating Dizziness, Pale skin Leg cramps, Insomnia
Scurvy	Anaemia, debility, exhaustion, Spontaneous bleeding Pain in the limbs, and especially the legs, swelling in some parts of the body Ulceration of the gums and loss of teeth.

(b) What do you mean by coenzymes?
Answer:
Co-enzyme is a non-protein compound that is necessary for the functioning of an enzyme. It is bound to the enzyme as a catalyst. This increases the rate of reaction. Co-enzymes always act along the enzymes. They cannot work independently. But the same molecule of coenzyme can be used again and again.

Many co-enzymes are vitamins or derived from vitamins. When vitamin intake is too low, then an organism also lacks the co-enzymes that catalyse reactions. Water-soluble vitamins, which include all B complex vitamins and vitamin C, lead to the production of co-enzymes. Two of the most important and widespread vitamin-derived coenzymes are Nicotinamide Adenine Dinucleotide (NAD) and co-enzyme A.

(c) Find the full forms of FAD, FMN, NAD, NADP.
Answer:

FAD	Flavin Adenine Dinucleotide
FMN	Flavin Mono Nucleotide
NAD	Nicotinamide Adenine Dinucleotide
NADP	Nicotinamide Adenine Dinucleotide Phosphate

(d) How much quantity of each vitamin is required every day?
Answer:

Vitamin	Daily requirement
A	700 and 900 μ grams
B Complex	100 mg/day for adults.
C	75 mg
D	5 μg
E	10 mg
K	80 μg

Choose the correct alternative and write its alphabet against the sub-question number:

Question 1.
The process of glycolysis occurs in ……….
(a) cytoplasm
(b) mitochondria
(c) nucleus
(d) cell membrane
Answer:
The process of glycolysis occurs in cytoplasm.

Question 2.
ATP is called ………. of the cell.
(a) energy currency
(b) combustion fuel
(c) storage of glucose
(d) protein depot
Answer:
ATP is called protein depot of the cell.

Question 3.
Excess of carbohydrates are stored in liver and muscles in the form of ………….
(a) sugar
(b) glucose
(c) glycogen
(d) protein
Answer:
Excess of carbohydrates are stored in liver and muscles in the form of glycogen.

Question 4.
Chemically vitamin B₂ is ………….
(a) Riboflavin
(b) Nicotinamide
(c) Cyanacobalomine
(d) Pantothetic acid
Answer:
Chemically vitamin B₂ is Riboflavin

Question 5.
Somatic and stem cells undergo type of ………… division. (March 2019)
(a) meiosis
(b) mitosis
(c) budding
(d) cloning
Answer:
Somatic and stem cells undergo type of mitosis division.

Question 6.
We get ……….. energy from carbohydrates.
(a) 9 kcal/gm
(b) 9 cal/gm
(c) 4 cal/gm
(d) 4 kcal/gm
Answer:
We get 4 cal/gm energy from carbohydrates.

Question 7.
Which of the following vitamins is necessary for synthesis of NADH₂?
(a) Vitamin B₂
(b) Vitamin B₃
(c) Vitamin
(d) Vitamin K
Answer:
(b) Vitamin B₃

Write whether the following statements are true or false:

Question 1.
Glucose is oxidized step by step in the cells during the process of respiration at the body level.
Answer:
False. (Glucose is oxidized step by step in the cells during the process of cellular respiration.)

Question 2.
In aerobic respiration, glucose is oxidized in three steps.
Answer:
True

Question 3.
Glycolysis is also called Embden-Meyerhof-Paarnas pathway.
Answer:
True

Question 4.
Molecules of pyruvic acid formed in this glycolysis are converted into molecules of acetyl-co-enzyme A.
Answer:
True

Question 5.
Excess of ATP molecules obtained from proteins are not stored in the body.
Answer:
False. (Excess of ammo acids obtained from proteins are not stored in the body.)

Question 6.
Proteins of animal origin are called ‘first class’ proteins.
Answer:
True

Question 7.
The disease related with the deficient synthesis of insulin is heart disease.
Answer:
False. (The disease related with the deficient synthesis of insulin is diabetes.)

Match the columns:

Protein	Part of the body (July 2019)
(1) Haemoglobin	(a) muscles
(2) Ossein	(b) skin
	(c) bones
	(d) blood

Answer:
(1) Haemoglobin – blood
(2) Ossein – bones.

Protein	Part of the body
(1) Keratin	(a) muscles
(2) Myosin	(b) skin
	(c) bones
	(d) blood

Answer:
(1) Keratin – skin
(2) Myosin – muscles.

Find the odd one out:

Question 1.
Progesterone, Estrogen, Testosterone, Insulin
Answer:
Insulin. (All the others are hormones produced with the help of fatty acids.)

Question 2.
Actin, Ossein, Myosin, Melanin
Answer:
Melanin. (All the others are proteins concerned with locomotion of the body.)

Question 3.
Lipids, Carbohydrates, Fatty acids, Proteins
Answer:
Fatty acids. (All the others are food constituents; fatty acid is soluble nutrient.)

Question 4.
Alcohol, Vinegar, Pyruvic acid, Lactic acid.
Answer:
Pyruvic acid. (All the others are chemical substances formed by the process of fermentation.)

Question 5.
Tricarboxylic acid cycle, Citric acid cycle, Krebs cycle, EMP pathway.
Answer:
EMP pathway. (All the other terms are synonymous to each other.)

Considering the relationship in the first pair, complete the second pair by using a word or group of words:

Question 1.
Process that occurs in the cytoplasm : Glycolysis :: Process that occurs in the mitochondria ………
Answer:
Krebs cycle

Question 2.
Skin : Keratin :: Blood : …………
Answer:
Haemoglobin

Question 3.
Energy obtained from protein : 4 kcal :: Energy obtained from fats / lipids : …………
Answer:
9 Kcal

Question 4.
Breakdown of glucose molecule : Glycolysis :: Formation of glucose from proteins : …………….
Answer:
Gluconeogenesis

Question 5.
Condensation of chromosomes : Prophase :: Formation of spindle fibres : …………
Answer:
Metaphase

Question 6.
Division of nucleus : Karyokinesis :: Division of cytoplasm :: ………..
Answer:
Cytokinesis.

Write definitions:

Question 1.
Gluconeogenesis.
Answer:
Gluconeogenesis: Formation of glucose through non-carbohydrate sources such a protein is called gluconeogenesis.

Question 2.
Fermentation.
Answer:
Fermentation: Conversion of pyruvic acid produced in the process of glycolysis into other organic acids or alcohol with the help of some enzymes is called fermentation.

Name the following:

Question 1.
Products formed after complete oxidation of acetyl part present in the molecule of acetyl-coenzyme-A.
Answer:
Molecules of CO₂, H₂O, NADH₂, FADH₂ and ATP.

Question 2.
Place where electron transfer chain reaction take place.
Answer:
Mitochondria present in the cytoplasm of the cell.

Question 3.
Two co-enzymes involved in cellular respiration.
Answer:
NAD → Nicotinamide Adenine Dinucleotide and FAD Flavin Adenine Dinucleotide.

Question 4.
Scientist who discovered the TCA cycle.
Answer:
Sir Hans Krebs.

Question 5.
Steps of anaerobic respiration.
Answer:
Glycolysis and fermentation.

Question 6.
Most abundantly found protein nature.
Answer:
An enzyme RUBISCO present in plant chloroplasts.

Give scientific reasons:

Question 1.
We feel exhausted after exercising.
Answer:

• When we undertake constant exercises, there may be shortage of oxygen for the cells.
• Therefore, our muscles and other tissues perform anaerobic respiration in such condition.
• In this process, lactic acid is formed.
• Molecules of ATP produced in oxidation of food are also much less.
• Thus, there is less energy in the body and accumulation of lactic acid too. All this brings about a feeling of exhaustion.

Answer the following questions in detail:

Question 1.
Write the forms to which the following food materials are converted after digestion:
(a) Milk (b) Potato (c) Oil (d) Chapati.
Answer:
(a) Milk: Proteins (casein) are converted into amino acids. Lactose sugar is converted into glucose. Lipids are converted into fatty acids and glycerol.
(b) Potato: Carbohydrates (starch) are converted into glucose.
(c) Oil: Lipids are converted into fatty acids and glycerol.
(d) Chapati: Carbohydrates (starch) are converted into glucose.

Question 2.
On which two levels does respiration take place in living organisms?
Answer:

1. In organism respiration takes place at two levels, viz. Body level and Cellular level.
2. Respiration at body level: The exchange of respiratory gases such as oxygen and carbon dioxide between body and surrounding is called respiration at body level.
3. Cellular respiration: Oxidation of nutrients inside the cell with or without oxygen is called cellular respiration.

Question 3.
Answer the following questions: (July 2019)
(a) Write main types of vitamins.
Answer:
A, B, C, D, E and K are main types of vitamins.

(b) Name water soluble vitamins.
Answer:
Water soluble vitamins are B and C.

(c) Name fat soluble vitamins.
Answer:
Fat soluble vitamins are A, D, E and K.

Question 4.
Answer the following questions:
(a) Why some living organisms have to perform anaerobic respiration?
Answer:
Some bacteria and lower organisms do not live in the presence of oxygen. In order to survive, they have to perform anaerobic respiration. Sometimes, muscle cells and erythrocytes also perform anaerobic respiration when there is lack of enough oxygen.

(b) Give two examples of such living organisms.
Answer:
Yeast and bacteria.

(c) What are the two steps of anaerobic respiration?
Answer:
Glycolysis and fermentation are the two steps of anaerobic respiration.

Question 5.
Which is the energy currency of the cell? Explain it in detail.
Answer:

• ATP or Adenosine triphosphate is the ‘energy currency’ of the cell.
• Chemical composition of ATP is as follows: it is a triphosphate molecule having adenosine ribonucleoside. The nitrogenous compound-adenine, pentose sugar-ribose and three phosphate groups are present in ATP.
• In this energy-rich molecule the energy remains trapped in the bonds by which phosphate groups are attached to each other.
• ATP molecules are stored in the cells. As per the need, energy is derived by breaking the phosphate bond of ATP.
• During cellular respiration, the oxidation of glucose yields 38 molecules of ATP. Whenever required they are consumed to liberate energy.

Question 6.
How is energy obtained during starvation or hunger?
Answer:

• Due to starvation or hunger, there is less supply of nutrients and energy to the body. In such condition, the stored carbohydrates in the body also deplete.
• In such condition, fats and proteins present in the body are utilized.
• Fats or lipids are converted into fatty acids and proteins are broken down to amino acids.
• Fatty acids and amino acids both are converted to acetyl-coenzyme-A.
• Acetyl-coenzyme-A can undergo series of cyclic reactions and oxidised to liberate energy in the form of ATP molecules.

Question 7.
Why glycolysis is also called EMP pathway?
Answer:
Process of glycolysis was discovered by Gustav Embden, Otto Meyerhof, and Jacob Pamas along with their colleagues. They performed experiments on muscles to understand glycolysis. Hence, in their honour, glycolysis is also edited Embden-Meyerhof-Parnas pathway or EMP pathway.

Question 8.
How are proteins obtained? What are the components of the proteins?
Answer:

• Protein, is a macromolecule which is formed by amino acids.
• When digestion of protein takes place, it forms different amino acids. These amino acids are transported to each cell by blood circulation.
• By protein synthesis, these amino acids are again used to make different kinds of proteins which our body needs.
• Animal proteins are said to be ‘first class proteins’ as they contain good quality amino acids.
• 4 Kcal/gm energy is obtained from the proteins.

Question 9.
Where and in which forms the amino acids formed after digestion of food are used in the body?
Answer:
(1) After digestion of proteins, amino acids are formed. These amino acids are used to synthesise proteins in different forms. e.g.

• In blood-Haemoglobin and antibodies are formed.
• In skin – Melanin and keratin are formed.
• In bones – Ossein is formed.
• In pancreas-Insulin and trypsin are synthesized.
• Pituitary and all other glands produce hormones by utilising amino acids.
• In muscles – Actin and myosin are formed.
• In all the cells, plasma membrane is formed by proteins. All enzymes are also synthesised using the amino acids.

Question 10.
What are fatty acids? What are the different uses of fatty acids ?
Answer:
(1) The fatty acids are components of the lipids. When lipids are digested, it forms fatty acids and alcohol (glycerol).
(2) There are certain chemical bonds between fatty acids and alcohol.
(3) Fatty acids are very essential for the health.
(4) After digestion, fatty acids are absorbed into the blood and transported to the cells.
(5) Different types of cells produce their own substances from these fatty acids.
E.g. (a) Plasma membrane is produced from phospholipids.
(b) Hormones like testosterone, progesterone, estrogen, aldosterone are produced from fatty acids.
(c) The axonal coverings around the neurons are also made from fatty acids.

Give explanations for the following statements:

Question 1.
After complete oxidation of a glucose molecules, 38 number of ATP molecules are formed.
Answer:
I. Glycolysis: No. of ATP molecules formed = 4
No. of ATP molecules used = 2
II. Krebs cycle : No. of ATP molecules formed = 2
III. ETC Reaction :
NADH₂: 10 NAD₂ x 3 ATP = 30 ATP
FADH₂ : 2 FADH₂ x 2 ATP = 4 ATP
Total ATP molecules produced = (4+2+34)
= 40 ATP
ATP molecules used = 2 ATP
Therefore, total ATP molecules = 38 ATP

Question 2.
At the end of glycolysis, pyruvate molecules are obtained.
Answer:
The process of glycolysis takes place m the cytoplasm of the cell. One molecule of glucose is gradually oxidized step by step forming two molecules of each pyruvic acid, ATP, NADH₂ and water. Of these, pyruvate or pyruvic acid takes part in the further reactions.

Question 3.
Genetic recombination occurs in pachytene phase of prophase of meiosis-I.
Answer:
In prophase of meiosis I there are total 5 stages. Of these in pachytene the process of crossing over takes place between homologous chromosomes as chromosomes come near each other forming synapsis.

Question 4.
All chromosomes are arranged parallel to equatorial plane of cell in metaphase of mitosis.
Answer:
In mitosis, the metaphase is the stage when dividing chromosomes lie on the equatorial plane of the cell. They are later pulled by the spindle fibres to the opposite poles.

Question 5.
For formation of plasma membrane, phospholipid molecules are necessary.
Answer:
Upon the digestion of fats, fatty acids and glycerol are formed. The fatty acids can be converted into phospholipid which are essential molecules for development of plasma membrane.

Question 6.
Our muscle cells perform anaerobic type of respiration during exercise.
Answer:
When the proportion of oxygen is less, then the cells switch over to anaerobic respiration. When we are exercising there is increased demand of oxygen for muscle cells. If this is not fulfilled, they perform anaerobic respiration during exercise.

Question 7.
Excess of carbohydrates are stored in liver and muscles in the form of glycogen.
Answer:
The carbohydrates which are not used to produce energy cannot be stored in the body in the form of glucose. This glucose is therefore converted into complex compound called glycogen. Glycogen is stored in muscles and liver.

Complete the paragraph by choosing the appropriate words given in the brackets:

Question 1.
(gamete, crossing over, haploid, Meiosis-II, meiosis-I, diploid)
……….. is just like mitosis. In this stage, the two haploid daughter cells formed in ……… undergo division by separation of recombined sister chromatids and four ……….. daughter cells are formed. Process of …………… production and spore formation occurs by meiosis. In this type of cell division, four haploid (n) daughter cells are formed from one ……….. cell. During this cell division, ………… occurs between, the homologous chromosomes.
Answer:
Meiosis-II is just like mitosis. In this stage, the two haploid daughter cells formed in meiosis-I undergo division by separation of recombined sister chromatids and four haploid daughter cells are formed. Process of gamete production and spore formation occurs by meiosis. In this type of cell division, four haploid (n) daughter cells are formed from one diploid cell. During this cell division, crossing over occurs between the homologous chromosomes.

Question 2.
(external, inhalation, alveolar, breathing, respiration, exhalation)
Release of energy from the assimilated food is called …………. Inhalation and exhalation is called …….. When ……….. is done, air enters the lungs. The oxygen from this air enters the blood while carbon dioxide from the blood exits from the blood. Through exhalation, CO₂ is given out. This gaseous exchange occurs through ……….. membrane. This is called ………….. respiration. The RBCs carry oxygen to every cell.
Answer:
Release of energy from the assimilated food is called respiration. Inhalation and exhalation is called breathing. When inhalation is done, air enters the lungs. The oxygen from this air enters the blood while carbon dioxide from the blood exits from the blood. Through exhalation, CO₂ is given out. This gaseous exchange occurs through alveolar membrane. This is called external respiration. The RBCs carry oxygen to every cell.

Read the paragraph and answer the questions given below:

1. Dietary fibre — found mainly in fruits, vegetables, whole grains and legumes — is probably best known for its ability to prevent or relieve constipation. But foods containing fibre can provide other health benefits as well, such as helping to maintain a healthy weight and lowering your risk of diabetes, heart disease and some types of cancer. Dietary fibre, also known as roughage or bulk, includes the parts of plant foods your body can’t digest or absorb. Unlike other food components, such as fats, proteins or carbohydrates — which your body breaks down and absorbs — fibre isn’t digested by your body. Instead, it passes relatively intact through your stomach, small intestine and colon and out of your body.

Questions and Answers :

Question 1.
Which food items provide rich fibre content?
Answer:
Fruits, vegetables, whole grains and legumes give rich amount of dietary fibre.

Question 2.
Enlist the advantages of fibres in diet.
Answer:
Fibres help to relieve constipation and help in maintaining a healthy weight and lowering risk of diabetes, heart disease and some types of cancer.

Question 3.
Are fibres digested in the body?
Answer:
No, fibres are not digested in the body but are passed on without any alteration.

Question 4.
Which is the path through which fibres pass in the digestive tract?
Answer:
Fibres pass through stomach, small intestine and colon.

Question 5.
What is a roughage?
Answer:
Roughage is the fibre content of the food which consists of plant matter which cannot be digested by the human enzymes, hence form undigested bulk matter in the faeces.

2. The substances formed by specific chemical bond between fatty acids and alcohol are called lipids. Digestion of lipids consumed by us is nothing but their conversion into fatty acids and alcohol. Fatty acids are absorbed and distributed everywhere within the body. From those fatty acids, different cells produce various substances necessary to themselves. Ex. the molecules called phospholipids which are essential for producing plasma membrane are formed from fatty acids. Besides, fatty acids are used for producing hormones like progesterone, estrogen, testosterone, aldosterone, etc. and the covering around the axons of nerve cells. We get 9 Kcal of energy per gram of lipids. Excess of lipids are stored in adipose connective tissue in the body.

Questions and Answers:

Question 1.
Define lipids.
Answer:
Lipids are molecules formed of fatty acids and glycerol (alcohol) which have specific bonds between them.

Question 2.
What happens to fats that are eaten in excess?
Answer:
When excess of fats are eaten, they are stored in adipose connective tissue.

Question 3.
Which hormones regulating reproductive functions are produced from fatty acids?
Answer:
Progesterone, estrogen and testosterone are the reproductive hormones produced from fatty acids.

Question 4.
How is plasma membrane of the cells formed?
Answer:
The digested fats are absorbed in the form of fatty acids. These are converted back to phospholipids from which plasma membrane of cells is formed.

Question 5.
What happens to lipids when their digestion is completed? How much energy do they provide?
Answer:
After complete digestion of lipids they are converted to fatty acids and glycerol. 1 gm of lipid provides 9 kcal of energy.

Diagram based questions:

Question 1.
Draw a neat diagram of the structure of chromosome and label the parts:
(a) Centromere (b) p-arm (March 2019)
Answer:

Question 2.
Sketch and label the diagram to show ATP – the energy currency of the cell.
Answer:

Question 3.
Mitochondria and Krebs cycle:
Answer:

(a) Which co-enzymes are shown in the diagram?
Answer:
The co-enzymes NADH₂ and FADH₂ are shown in the above diagram.

(b) Which chemical reaction takes place in the mitochondria? Which molecules are produced in this reaction?
Answer:
The chemical reaction that takes place in the mitochondria is called Electronic Transport Chain reaction. The molecules of H₂O, carbon dioxide and energy in the form of ATP are produced in this reaction.

Question 4.
Observe the diagrams 2.8 and 2.9 given on the Textbook page no. 19 and answer the following questions.


(a) Which peculiarity do you observe in the figure of Metaphase-I of meiosis ?
Answer:
The chromosomes are seen lying on the equatorial plane in the metaphase-I of meiosis.

(b) What is the important difference between Telophase-I and Telophase-II of meiosis?
Answer:
In figure of Telophase-I the diploid chromosomes are seen in two daughter cells. In Telophase-II four daughter cells are seen with haploid chromosomes in them.

(c) Which figure shows phenomena of crossing over?
Answer:
The third figure of Prophase-I shows phenomena of crossing over.

Question 5.
Label the diagram below? Which phase of cell division is seen in the above diagram?
Answer:
The above figure shows Telophase-II of Meiosis-II.

Question 6.
Observe and label the diagram: (Text Book Page No. 13)
Answer:

Activity based questions:

Question 1.
Complete the following chart and state which process of energy production it represents: (March 2019)

Answer:
The chart shows process of energy production through aerobic respiration of carbohydrates, proteins and fats.
(Answers to the blanks in chart are given in bold.)

Project:

Project 1.
Use of ICT: (Text Book Page No. 20)
Collect videos and photographs of different life processes in living organisms. Prepare a presentation and present it on the occasion of science exhibition.

Project 2.
Books are my friend: (Text Book Page No. 20)
Read different Encyclopaedias of technical terms in biology and anatomy and other reference books.

Balbharti Maharashtra State Board Class 10 Geography Solutions Chapter 4 Climate Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 10 Geography Solutions Chapter 4 Climate

Class 10 Geography Chapter 4 Climate Textbook Questions and Answers

Question 1.
Write names of the States/Regions in appropriate columns.
Bihar, Tocantins, Pernambuco, Alagoas, Eastern Maharashtra, Western part of Rajasthan, Gujarat, Rio Grande Do Norte, Paraiba, Western Ghats, Eastern Himalayas, Western Andhra Pradesh, Roroima, Amazonas, West Bengal, Rio Grande Do Sul, Santa Catarina, Goa
Answer:

States/Regions	India	Brazil
High rainfall	Western Ghats, Eastern Himalayas, Goa	Tocantins, Rio Grande Do Sul, Roraima
Moderate rainfall	Bihar, Eastern Maharashtra West Bengal	Santa Catarina, Amazonas, Alagoas
Low rainfall	Western part of Rajasthan, Gujarat, Western Andhra Pradesh	Pernambuco, Paraiba, Rio Grande Do Norte, Alagoas

2. State whether right or wrong. Rewrite the wrong sentences

Question a.
The fact that Brazil lies on the equator affects its climate in a big way.
Answer:
Right.

Question b.
India and Brazil have the same seasons at the same time.
Answer:
Wrong – India and Brazil have different seasons at the same time.

Question c.
India faces tropical cyclones frequently.
Answer:
Right.

Question d.
Brazil gets a lot of rainfall because of the southwest monsoon winds.
Answer:
Wrong – Brazil gets rainfall from South-East Trade Winds and North-East Trade Winds.

3. Give geographical reasons:

Question a.
The north-eastern part of Brazilian Highlands receives very less rainfall.
Answer:
(i) Brazil gets rainfall from the South-East Trade Winds and the North-East Trade Winds.
(ii) Parts of the Brazilian Highlands extend upto the northern coast.
(iii) The Escarpments act as an obstruction to the winds blowing from the sea and cause orographic type of rainfall in the coastal region.
(iv) Beyond the Highlands, the effect of these winds gets reduced. As a result, the rainfall is minimal.
(v) Thus the North Eastern part of Brazilian highlands receives less rainfall. This rain shadow region is also called the ‘Drought Quadrilateral’.

Question b.
Snowfall doesn’t always occur in Brazil.
Answer:
(i) Because of the vast latitudinal extent of Brazil, it experiences a wide range of climatic variations. Near the Equator it is hot, while tropical type of climate is found near the Tropic of Capricorn.

(ii) Considering the temperatures in Brazil, the northern part of Brazil is hot while the temperatures in the southern part are comparatively lower.

(iii) It generally snows in those areas lying in the temperate or polar regions or in the mountainous regions of very high altitude.

(iv) Snowfall does occur but is only confined to higher elevations in the southern states of Rio Grande Do Sul, Parana and Santa Catarina.

(v) Most part of the country lies in the tropical zone which experiences a hot and humid climate.

So snowfall doesn’t always occur in Brazil and is considered a rare phenomenon.

Question c.
Convectional type of rainfall is not prominent in India.
Answer:
(i) Convectional rains are a feature of the equatorial regions and the equator passes through the northern part of Brazil.
(ii) Due to the intense heat here the air expands and rises upwards. As the air goes upwards it cools down, condensation occurs and clouds are formed. This leads to convectional rains every day.
(iii) As such conditions do not exist in India, convection rainfall is not prominent here.

Question d.
Tropical cyclones occur rarely in Brazil.
Answer:
(i) In the coastal regions of Brazil near the Equator, differences in temperatures are negligible.
(ii) The winds move in the vertical direction in this equatorial region.
(iii) Similarly, the convergence zone of the trade winds is weak here. As a result, cyclones are not formed.
(iv) As a result tropical cyclones occur rarely in Brazil.

Question e.
There is not much difference in the range of temperature in Manaus.
Answer:
(i) Manaus is located to the north of Brazil and close to the Equator.
(ii) This region receives perpendicular rays of the sun throughout the year.
(iii) It also receives convectional type of rainfall every day.
(iv) So the climate is hot and humid throughout the year.
(v) As, there is not much difference in the maximum and minimum temperatures there is not much difference in the range of temperature in Manaus.

Question f.
India receives precipitation from the North East Monsoon Winds too.
Answer:
(i) In the winter season, India is influenced by the North East Monsoon Winds.
(ii) These winds bring cool breeze to the country.
(iii) While blowing over Bay of Bengal the North East Monsoon Winds pick up moisture and give rain to the eastern coast of Andhra Pradesh and Tamil Nadu in India.
So, it is said that India receives precipitation from the North East Monsoon Winds too.

4. Answer the following questions:

Question a.
Describe in brief the changes occurring in the climatic conditions of India while going from south to north.
Answer:
(i) India’s Climate is of monsoon type. But there is diversity in climatic conditions of India due to the latitudinal location and altitude of the place.

(ii) As the Tropic of Cancer passes through middle of India, it divides the country into tropical region and sub tropical region.

(iii) The tropical region receives nearly vertical rays of the Sun and the temperature increases as we move towards the south.

(iv) In the sub tropical region of the north, summers are very hot and winters are very cool and dry.

(v) The Himalayas lie in the northern part of India. They protects us from the cold winds that blow from the north, obstructs the South West Monsoon Winds which results in orographic rainfall in its southern slopes.

(vi) In major parts of India precipitation is in the form of rainfall, but in the Himalayas it is in the form of snowfall.

Question b.
Explain the importance of the Himalayas and the Indian Ocean with respect to the climate of India.
Answer:
(i) The Indian Ocean and the Himalayan ranges exert a great influence on the climate of India and the origin of monsoons.

(ii) Because of high temperatures in summers, a low pressure area develops in the Punjab Plains and the Thar Desert of Rajasthan.

(iii) At the same time a high pressure region develops over the Indian Ocean.

(iv) This attracts winds and they start blowing from the Indian Ocean towards the mainland India.

(v) These are moisture-laden winds which bring rainfall to India.

(vi) These winds move towards the Himalayas and due to the natural obstruction of the Himalayas, orographic rain occurs.

(vii) Later these winds retreat from the Himalayas and move from the north-east towards the Indian Ocean and brings rain to some parts of the Peninsula.

(viii) Also the severe cold winds blowing from the north are obstructed by the Himalayas and it saves India from severe winters.

Question c.
Discuss the factors affecting the climate of Brazil.
Answer:
(i) Brazil experiences wide range of climatic variations due to its vast latitudinal extent, proximity to the Equator, presence of the Atlantic Ocean and the Great Escarpment.

(ii) The northern part of Brazil near the Equator is hot, while temperate type of climate is found near the Tropic of Capricorn.

(iii) Brazil gets rainfall from the South-East Trade Winds and the North-East Trade Winds blowing from the Atlantic Ocean.

(iv) Convectional rainfall occurs in places near the equator. Whereas, the Escarpment act as an obstruction to the winds blowing from the sea and cause orographic type of rainfall in the coastal region.

(v) Beyond the Highlands the effects of these winds gets reduced, as a result the rainfall is minimal. This region is a rain-shadow region and is called ‘The Drought Quadrilateral.’

(vi) The Equator passes through the northern part of Brazil so the temperature here is high. Average temperature of Amazon valley is 25°-28°C. Climate is cooler in the highlands. While the temperatures in the southern part are comparatively lower.

(vii) In the coastal regions near the Equator in Brazil, differences in temperatures are negligible. Because of the proximity to the sea, the coast experiences mild and humid climate.

(viii) The winds move in the vertical direction in this region. Similarly, the convergence zone of the trade winds is weak here. So the tropical cyclones are a rare phenomena here.

Question d.
Compare the climates of brazil and India?
Answer:

Climate of India	Climate of Brazil
(i) India has a monsoon type of climate.	(i) Brazil has a tropical climate to the north and temperate climate to the south.
(ii) The southern part of India lies in the tropical region so the temperature is high in the south and comparatively low in the north, i.e., the temperature decreases from south to north.	(ii) The northern part of Brazil lies in the tropical region so the temperature is high in the north and comparatively low in the south, i.e., the temperature decreases from north to south.
(iii) India receives rain from the South West and the North East Monsoon Winds.	(iii) Brazil receives rain from the South East and North East Trade Winds.
(iv) India receives orographic rainfall.	(iv) Brazil receives convectional and orographic type of rainfall.
(v) The western part of Rajasthan, Gujarat and eastern side of the Western Ghats receive less rain.	(v) The north eastern part of the Brazilian highlands is a rain shadow region.
(vi)     Tropical cyclones are a frequent phenomena.	(vi) Tropical cyclones are a rare phenomena

Class 10 Geography Chapter 4 Climate Intext Questions and Answers

Observe the given map below and answer the following questions

Question 1.
Considering the isotherms of Brazil, what is the average range of temperature in Brazil?
Answer:
Considering the isotherms of Brazil, the average range of temperature of Brazil is 10°C (28°C-18°C).

Question 2.
In which area does it rain more?
Answer:
It rains more in the northern and central part of Brazil. E.g., Amazon Valley.

Question 3.
From which directions are winds blowing towards Brazil?
Answer:
The winds are blowing from North East and South East directions.

Question 4.
What could be the reason behind that?
Answer:
These are permanent trade winds which blow from high pressure belt to the equatorial low pressure belt. Brazil being in the tropical zone, a low pressure area is created and wind start blowing from the ocean to the land.

Question 5.
What could be the obstruction in the way of these winds?
The Escarpment acts as obstruction in the way of the South East Trade Winds coming from the sea.

Question 6.
Which type of rainfall will occur because of these winds?
Answer:
Orographic rainfall will occur because of these winds.

Question 7.
Correlate these winds and rainfall.
Answer:
The escarpments act as an obstruction to the winds blowing from the sea and cause an orographic type of rainfall in the coastal region. Beyond the Highlands, the effect of these winds gets reduced. As a result, the rainfall is minimal.

Question 8.
In which part of Brazil are the average temperatures low?
Answer:
The average temperatures are low in the southern part of Brazil.

Question 9.
Identify the rain-shadow area in Brazil. Describe its climatic characteristics.
Answer:
The north-eastern part of the Brazilian highlands is a rain shadow region. Beyond the highlands, the effect of the South East Trade Winds gets reduced and the rainfall is minimal. Also, the temperature here is quite high. This rain shadow region is referred to as the ’Drought Quadrilateral’.

Question 10.
In which region do you find a higher temperature?
Answer:
The northern part of Brazil has higher temperature.

Question 11.
Considering the latitudinal extent of Brazil, where will you find a temperate climate in Brazil?
Answer:
The southern part of Brazil lying below 23 V4°S latitude (Tropic of Capricorn) experiences temperate climate.

Question 12.
Describe the winds blowing between 0° to 5° N and S zones.
Answer:
The winds blowing between 0° to 5° N and S zones move in the vertical direction leading to convectional type of rain. The North East and South East Trade winds are very weak in this region.

Question 13.
Which method has been used to show distribution in this map?
Answer:
The Isopleth method has been used to show distribution in this map.

Observe the given map and answer the following questions

Question 1.
Which region gets more than 4000mm of rainfall?
Answer:
Western Ghats, Western Coasts of India and the northeastern region comprising of Mawsynram, Cherrapunji and parts of Assam and Arunachal Pradesh gets more than 4000 mm of rainfall.

Question 2.
Identify the regions with maximum and minimum temperatures?
Answer:
Central and North Western parts of Peninsular Plateau and islands have high temperature. Hilly regions of north, northeast and south India have low temperature.

Question 3.
In which direction is the temperature increasing?
Answer:
The temperature is increasing towards the south.

Question 4.
Identify the direction of the winds shown. What are they known as?
Answer:
The winds shown are blowing from the south west to north east direction. These winds are called Southwest Monsoon Winds.

Question 5.
Which winds are responsible for the rainfall in India ?
Answer:
South-West Monsoon Winds are responsible for rainfall in India.

Question 6.
Some part of Rajasthan is under desert? What could be the reason for it?
Answer:
The South West Monsoon Winds blow parallel to the Aravallis. As these moisture laden winds are not obstructed by the Aravallis it rains less here. Hence, Rajasthan is under desert.

Question 7.
Draw the main parallel latitude passing through India which affects its climate.
Answer:
Students are expected to draw the Tropic of Cancer.

Question 8.
In which part of Peninsular India is semi-arid climatic conditions found and why?
Answer:
(i) The part of peninsular India which has semi-arid climatic conditions are central part of Peninsula Plateau comprising parts of Central Maharashtra, Western Andhra Pradesh, Eastern Karnataka and Western Tamil Nadu. These regions lie on the leeward side of the Western Ghats and Eastern Ghats. It rains less here and a rain shadow region is formed.
(ii) Some parts of Gujarat and Rajasthan are also semi-arid as the Aravallis lie parallel and do not obstruct the South-west Monsoon winds.

Give geographical reasons:

Question 1.
Shillong gets less than 1000 mm of rainfall annually, whereas Cherrapunji/Mawsynram which is nearby get’s over 11000 mm, of rainfall annually.
Answer:
(i) Cherrapunji/Mawsynram lies in the higher altitude on the windward side of the Khasi Hills and receives rainfall from the South West Monsoon Winds.
(ii) While Shillong lies in the lower altitude on the leeward side of the Khasi Hills, so it receives less rainfall being in the rain shadow area.

Observe the pictures given below and write brief description about them.

Question 1.

Answer:
Both the figures shows the traffic congestion during heavy rains. Due to lack of proper drainage and heavy downpour the water gets accumulated disturbing the commuting system.

Question 2.


Answer:
Both the figures show the drought affected regions of India and Brazil respectively. Due to scarce amount of rainfall received in these regions the land has became dry and cannot be cultivated.

Question 3.

Answer:
figure shows snow fall during winter season in the northern parts of India.

Question 4.

Answer:
figure shows heavy rainfall in the Brazilian rainforest region.

Question 5.

Answer:
figure shows the trees being cut down to bring land under cultivation. Deforestation is a major issue in Brazil.

Question 6.

Answer:
figure shows a well from which water is used for domestic purpose.

Question 7.

Answer:
figure shows paddy fanning in India. The farmers are planting paddy. The water logged fields are shown.

Study the graphs given below and answer the following questions:

Question 1.
In which month is the highest temperature found in all the four cities?
Answer:
The highest temperature is found in the month of January.

Question 2.
In which month does it rain the most in the given cities?
Answer:
It rains the most in the month of march.

Question 3.
When does Brazil have its rainy season?
Answer:
Brazil has its rainy season from December to march.

Question 4.
Which city has the maximum range of temperature? How much is it?
Answer:
Porto Alegre has the maximum range of temperature. It is 20°C (30° C -10° C).

Question 5.
What type of climate will be found in Rio de Janeiro?
Answer:
Rio de Janeiro has mild & humid climate.

Question 1.
What difference do you find in the rainy seasons of Chennai and other cities of India? Why?

Rainy Season of Chennai	Rainy Seasons of Other Indian Cities
(i) Chennai mainly receives rain from October to December.	Other cities of India receive rainfall from June to September.
(ii) Chennai receives rainfall from North East Monsoon Winds.	The other cities receive rainfall mainly from South-West Monsoon Winds.

Question 2.
What similarities do you see in the temperature curves of Delhi and Kolkata?
Answer:
The following similarities can be seen in the temperature curves of Delhi and Kolkata:

• The temperature rises from January to March.
• From March till June high temperatures are experienced.
• The temperature drops till July and remain stable in August and September.
• Thereafter the temperatures decreases.

Question 3.
Calculate the average range of minimum and maximum temperatures of all the four cities.

Cities	Average range of minimum and maximum temperatures
Delhi	34°C (41°-7°)
Kolkata	28°C (37°-9°)
Mumbai	17°C (34° -17°)
Chennai	18°C (39° – 21°)

Question 4.
In which city is the range minimum? What can you infer about its climate?
Answer:
The range is minimum in Mumbai due to its proximity to the sea.

Question 5.
In which city is the range maximum? What can you infer from this about its climate?
Answer:
The range is maximum in Delhi. It indicates that Delhi has an extreme climate.

Question 6.
Based on the temperature and rainfall of Mumbai, comment upon its climate.
Answer:
Mumbai has an equable climate, with less variation in summer and winter temperature.

Question 7.
Classify the cites as cities with equable and extreme climates.
Answer:
Equable climates – Mumbai, Chennai, Kolkata. Extreme climate – Delhi.

Give it a try

Question 1.
Considering the various factors affecting Brazil’s climate, complete the table.
Answer:

Regions	Climatic characteristics
(1) Amazon Valley	The climate is generally hot and humid. It receives around 2000mm of rainfall. The average range of temperature here is 25°C – 28°C.
(2) Highlands	Hot and dry climate, low rainfall.
(3) Pantanal	Warm and humid.
(4) North Coastal region	Hot and humid climate. Rainfall between 1000 to 1200 mm.
(5) South Coastal region	Mild and humid climate.
(6) Southernmost region of Brazil	Hot summers, cool winters and snowfall.

Question 2.
In which part of India are crops grown in a year? How is this related to the rainfall over there?
Answer:
(i) Coastal areas of Tamil Nadu in India grow rice three times a year.
(ii) This crop is taken during the retreating monsoon season.
While blowing over Bay of Bengal, the North East Monsoon winds pick up moisture and give rain to eastern coast of Tamil Nadu.

Use your brain power!

Question 1.
Group the months into seasons for a whole year according to the charts given.

Seasons	India	Brazil
Summer	March to May	December to March
Winter	December to February	June to September

Answer:

Colours of Both!

Question 1.
Considering the location extent and climatic conditions of both the countries, write months according to the seasons.
Answer:

Seasons	India	Brazil
Summer	March to May	December to March
Winter	December to February	June to September

Class 10 Geography Chapter 4 Climate Additional Important Questions and Answers

Choose the correct option and rewrite the statements:

Question 1.
The climate found near the Equatorial region is
(a) hot
(b) dry
(c) humid
(d) cold
Answer:
(a) hot

Question 2.
The climate found near the Tropic of Capricorn is
(a) tropical
(b) hot
(c) temperate
(d) tundra
Answer:
(c) temperate

Question 3.
Brazil gets rainfall from
(a) North-West and South-West trade winds
(b) Westerly winds
(c) South-West and North-East
(d) North-East and South-East trade winds
Answer:
(d) North-East and South-East trade winds

Question 4.
The act as an obstruction to the winds blowing from the sea in Brazil.
(a) Himalayas
(b) Escarpments
(c) Andes
(d) Western Ghats
Answer:
(b) Escarpments

Question 5.
The coastal region of Brazil receives a type of rainfall.
(a) orographic
(b) cyclonic
(c) convectional
(d) frontal
Answer:
(a) orographic

Question 6.
Since the convergence of trade winds are weak near the equator, are not formed.
(a) clouds
(b) ocean currents
(c) cyclones
(d) tides
Answer:
(c) cyclones

Question 7.
The average temperature in the Amazon valley is
(a) 15°-20°C
(b) 13°-15°C
(c) 30°-32°C
(d) 25°-28°C
Answer:
(d) 25°-28°C

Question 8.
The Amazon valley receives around mm of rainfall
(a) 2000
(b) 1800
(c) 1500
(d) 1000-1200
Answer:
(a) 2000

Question 9.
India’s climate is of type.
(a) humid
(b) monsoon
(c) equatorial
(d) cold
Answer:
(b) monsoon

Question 10.
The diversity in the climatic conditions of India is due to the location and altitude of the place.
(a) longitudinal
(b) latitudinal
(c) equatorial
(d) tropical
Answer:
(b) latitudinal

Question 11.
The Ocean and the Himalayan ranges exert a great influence on the climate of India.
(a) Atlantic
(b) Arctic
(c) Pacific
(d) Indian
Answer:
(d) Indian

Question 12.
Orographic type of rainfall occurs in India because of the natural obstruction of
(a) Himalayas
(b) Escarpments
(c) Highlands
(d) Satpuda
Answer:
(a) Himalayas

Question 13.
As the passes through the middle of India, it is considered to be a tropical region.
(a) Tropic of Capricorn
(b) Equator
(c) Tropic of Cancer
(d) 60°S latitude
Answer:
(c) Tropic of Cancer

Question 14.
Most part of Brazil lies in the zone.
(а) polar
(b) tropical
(c) sub-tropical
(d) temperate
Answer:
(b) tropical

Match the columns:

Question 1.

Column ‘A’	Column ‘B’
(1) Wettest places in the world	(a) Tamil Nadu
(2) Driest place in India	(b) Cherrapunji and Mawsynram
(3) Rainshadow region in Brazil	(c) Jaisalmer, Rajasthan
(4) Climate of India	(d)    Drought Quadrilateral (e)    Monsoon type (f)     Dry type

Answer:
1 – b
2 – c
3 – d
4 – e

Answer in one sentence each.

Question 1.
Which natural disasters does India face frequently?
Answer:
India frequently faces natural disasters like erratic rainfall, droughts, cyclones, floods, etc.

Question 2.
Why does Brazil experience wide climatic variations?
Answer:
Brazil has vast latitudinal extent because of which it experiences wide climatic variations.

Question 3.
Which winds bring rainfall to Brazil?
Answer:
Brazil receives rainfall from the South East and North-East Trade Winds.

Question 4.
What acts as an obstruction to the winds blowing from sea in Brazil?
Answer:
The Escarpments act as an obstruction to the winds blowing from the sea in Brazil.

Question 5.
Which region is called the Drought Quadrilateral’?
Answer:
The northern part of Brazil beyond the Highlands is called ‘Drought Quadrilateral’.

Question 6.
Where is the difference in temperature negligible in Brazil?
Answer:
In Brazil the difference in temperature is negligible in the coastal regions near the equator.

Question 7.
In which zone does most of Brazil and India lie?
Answer: Most part of Brazil and India lies in the Tropical zone.

Question 8.
Which important latitude passes through the northern part of Brazil?
Answer:
The equator passes through the northern part of Brazil.

Question 9.
What is the average temperature in Amazon valley?
Answer:
The average temperature in Amazon valley is 25°-28°C.

Question 10.
Which part of Brazil has cooler climate?
Answer:
The climate is cooler in the Highlands.

Question 11.
Why do the Brazilian coasts experience mild and humid climate?
Answer:
The Brazilian coasts experience mild and humid- climate because of its proximity to sea.

Question 12.
Which type of climate is found in India?
Answer:
Monsoon type of climate is found in India.

Question 13.
Which important latitude passes through the middle of India?
Answer:
The Tropic of Cancer passes through the middle of India.

Question 14.
What diversifies the climatic conditions of India?
Answer:
The diversity in the climatic conditions of India are due to the latitudinal location and altitude of India.

Question 15.
What exerts a great influence on the climate of India and the origins of the monsoon?
Answer:
The Indian Ocean and the Himalayan ranges exert a great influence on the climate of India and the origin of monsoons.

Question 16.
In India, what obstructs the cold winds blowing from the North?
Answer:
In India, the Himalayas obstruct the cold winds blowing from the north.

Question 17.
What brings more rain in the coastal regions of India?
Answer:
The obstruction caused by the Eastern and Western Ghats brings more rain in the coastal regions of India.

Question 18.
Find out more about the different ways of classification of the seasons. For example, what is summer?
Answer:
The hot weather season is called summer. The season where the rain begins is called the monsoon. The cold weather season is called winter.

Name the following:

Question 1.
The two places in India which are considered as the wettest places in the world.
Answer:
Cherrapunji and Mawsynram.

Question 2.
Years in which Brazil has experienced snowfall.
Answer:
1879,1957and 1985.

Question 3.
The driest part of India.
Answer:
Jaisalmer, Rajasthan.

Question 4.
The state in India which receives maximum rainfall during the retreating monsoon season.
Answer:
Tamil Nadu.

Question 5.
Temperature in Kargil in winter.
Answer:
-48°C.

Question 6.
Temperature in Ganganagar, Rajasthan in the month of June.
Answer:
50°C.

Question 7.
The hills responsible for heavy rainfall in Cherrapunji and Mawsynram.
Answer:
Garo, Khasi and Jaintia Hills.

Question 8.
The winds which provide rainfall to the Tamil Nadu coast.
Answer:
North East Monsoon winds.
Question 9.
The state to receive rain foremost in India.
Answer:
Kerala.

Question 10.
The four seasons of India as per Indian meteorological department.
Answer:
The hot weather season (Summer), the season

Are the sentences right ot wrong? Rewrite the wrong ones.

Question 1.
Brazil experiences wide climatic variation due to its vast longitudinal extent.
Answer:
Wrong – Brazil experiences wide climatic variation due to its vast latitudinal extent.

Question 2.
The winds move in the vertical direction in northern Brazil.
Answer:
Right.

Question 3.
The rainfall reduces on the windward side of the Great Escarpment.
Answer:
Wrong – The rainfall increases on the windward side of the Great Escarpment.

Mark the following on the map with the given information and make an index.

Question 1.
Outline Map of Brazil.

1. Winds bringing rainfall to Brazil or North East and South East Trade winds.
2. Drought Quadrilateral or Rainshadow region in Brazil.

Answer:

Question 2.
Outline Map of India.

1. Southwest Monsoon winds or winds bringing rainfall to most parts of India.
2. Northeast monsoon winds.
3. Kargil or place recording lowest temperature in India.
4. Cherrapunji and Mawsynram.
5. Coromandel coast or the coast receiving rainfall from North East monsoon winds.
6. Jaisalmer or place recording lowest rainfall in India.
7. Rain shadow region of Deccan plateau.
8. Region of low rainfall.
9. Heavy rainfall region along the western coast.

Answer:

Balbharti Maharashtra State Board Class 10 History Solutions Chapter 2 Historiography Indian Tradition Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 10 History Solutions Chapter 2 Historiography Indian Tradition

Question 1.
(A) Choose the correct option from the given options and complete the statement.
(1) …………………..…….. was the first Director-General of the Archaeological Survey of India.
(a) Alexander Cunningham
(b) William Jones
(c) John Marshall
(d) Friedrich Max Muller
Answer:
(a) Sir Alexander Cunningham

(2) …………………..…….. translated the Sanskrit text of ‘Hitopadesh’ in the German language.
(a) James Mill
(b) Friedrich Max Muller
(c) Mountstuart Elphinstone
(d) Sir John Marshall
Answer:
(b) Friedrich Max Muller

(B) Identify and write the wrong pair in the following set.
(1) ‘Who were the Shudras’ – subaltern History
(2) ‘Stri-Purush Tulana’ – Feminist writing
(3) ‘The Indian War of Independence 1857’ – Marxist History
(4) Grant Duff – Colonial History.
Answer:
(1) Right Pair: ‘Who were the Shudras’ – subaltern History
(2) Right Pair: ‘Stri-Purush Tulana’ – Feminist writing
(3) Wrong Pair: ‘The Indian War of Independence 1857’ – Marxist History
(4) Right Pair: Grant Duff – Colonial History.

Question 2.
Explain the following with its reason.
(1) Writing of the regional history received a momentum.
Answer:

• Indian historians trained in the British educational system showed an inclination to restore the self-esteem of Indians They started writing Nationalistic historiography.
• Historians from the different regions of India criticised the prejudiced history of India written by the British officers.
• Their attention was drawn towards geographic conditions and history of different regions of India.
• The nationalistic historiography helped in triggering the independence movement.
• It provided a momentum to the writing of regional histories for e.g.
• Nationalistic writings in Maharashtra were inspired by Vishnu Shastri Chiplunkar.

Hence, writing of the regional history received momentum.

(2) Bakhar is an important type of historical documents.
Answer:

• Bakhars are important source of history like coins, inscriptions, texts, copper plates and travelogues.
• Bakhars contain eulogies of the heroes, historic events, stories of lives of great men and description of battles.
• It portrays a picture of prevalent society, religions and economic life.
• Bakhars are of various types which contain biographies of kings, dynastic history, description of events, sects, autobiographies, mythologies, administration of kings, etc.
• These descriptions are helpful for writing historiography.
• Among well-known Marathi. Bakhars ‘Sabhasad Bakhar’ written by Krishnaji Anant Sabhasad requires a special mention Bhausahebanchi Bakhar and Panipatachi Bakhar describe the ‘Battle of Panipat’.

Hence, Bakhars are important type of historical document.

Question 3.
Write detailed Answers the following questions in detail.
(1) What is Marxist History?
Answer:

1. In the post-independence era, new trends emerged in writing Indian historiography. Marxist historiography is prominent among them.
2. Historiography which is based on ideas of Karl Marx is known as Marxist Historiography. In Marxist Historiography, more importance was given to class struggles.
3. Marxist Historiography reflects concerns for means and modes of production as well as the industrial relations. These became centre of writings of the Marxist historians.
4. How every social event affects the life of people was analysed and it became the theme of Marxist historians Marxist historians studied the transitions that took place in the caste system.
5. Notable Indian historians who adopted Marxist ideologies were Damodar Kosambi, Comrade Shripad Dange, Sharad Patil and Ram Sharan Sharma.
6. Their writings reflected Marxist ideology. Comrade Dange was the founder member of the Indian Communist Party

(2) What is the contribution of Itihasacharya V.K. Rajwade to historiography?
Answer:

1. V.K. Rajwade is well-known for his writings in Marathi on subjects like history, linguistics, etymology and grammar. His contributions are as follows:
2. He compiled and edited 22 volumes of Marathyanchya Itihasachi Sadhane.
3. He stated that history is the all-inclusive image of the past societies.
4. V. K. Rajwade was of the view that history does not include only the stories of political images, conspiracies and Wars for seizing power.
5. He was of the firm opinion that we should write our own history and insisted that history . should be written only using the authentic sources.
6. He was of the opinion that description of any human event in historiography should have balanced combination of three factors namely – Time, Space and Personalities.

Question 4.
(a) Complete the following chart.

Historian	Name of the Book
James Mill	‘The History of British India’
James Grant Duff	……………………………………………
……………………………………………	‘The History of India’
S.A. Dange	……………………………………………
……………………………………………	‘Who were the Shudras’

Answer:

Historian	Name of the Book
James Mill	The History of British India
James Grant Duff	A History of Mahrattas
Mountstuart Elphinstone	The History of India
S. A. Dange	Primitive Communism to Slavery
Dr. Babasaheb Ambedkar	Who Were the Shudras

(b) Complete the following concept chart.

Answer:

Question 5.
Explain the following concepts.
(1) Orientalist historiography.
Answer:

1. In the later part of the eighteenth century many European scholars felt curious to know about civilisations and countries of the East.
2. These scholars who studied the Indian Civilization had respect and admiration for it. They were known as ‘Orientalists’.
3. They studied similarities between Sanskrit and some of the European languages, focussing more on Vedic traditions and Sanskrit literature.
4. It resulted in the notion that an ancient language could be the mother of all Indo-European languages.
5. Notable Orientalist scholars are Friedrich Max Muller and William Jones.

(2) Nationalistic historiography.
Answer:

1. English education started in India in the nineteenth century. The Indian historians who were trained in English education system realised the glory of their past.
2. They showed an inclination to restore the pride in the ancient glory of India and the self-esteem of the Indian readers.
3. They laid the foundation of Nationalistic writing. Nationalistic writings in Maharashtra were inspired by ‘Vishnushastri Chiplunkar’.
4. Nationalistic historians opposed the prejudiced history written by the British officers.
5. Mahadev Govind Ranade, Vinayak Damodar Savarkar, Ramesh Chandra Majumdar are renowned Nationalistic historians.
6. Nationalistic historiography inspired freedom struggle against the Britishers and gave momentum to write about regional history. While glorifying the past, at times they are blamed for ignoring to critically analyse the truth.

(3) Subaltern history.
Answer:

• History of deprived classes or communities who were deprived of all rights is known as subaltern history.
• The seeds of subaltern history can be traced in the Marxist history. Italian historian Antonio Gramsci has special importance in writing the subaltern history.
• He presented the idea that history should be written starting from the bottommost ranks of people in the society.
• Ranjit Guha, an Indian historian, has given prominence to subaltern history and played a major role in establishing it as an important academic school of historiography.
• Similar thoughts were expressed by Mahatma Phule and Dr. Babasaheb Ambedkar which can be found in their writings.

Project
Prepare an illustrated manuscript with the help of the internet giving more information about the historians mentioned in this lesson.
Answer:

Memory Map

Question 6.
Complete the sentences by choosing a correct option:
(a) The first written document found in India was inscribed during the rule of Emperor ……………….. .
(a) Akbar
(b) Harshavardhan
(c) Ashoka Maurya
(d) Aurangzeb
Answer:
(c) Ashoka Maurya

(b) Banabhatta wrote King Harsha’s biography titled ………………… in the 7th century CE.
(a) Meghdoot
(b) Rajtarangini
(c) Rasratnakar
(d) Harshacharit
Answer:
(d) Harshacharit

(c) In the 12th century C.E., ………………… wrote a book ‘Rajtarangini’ about history of Kashmir.
(a) Banabhatta
(b) Kalhana
(c) Ziquddin Barani
(d) Patanjali
Answer:
(b) Kalhana.

(d) The historians in the courts of Muslim rulers were influenced by ………………… historiography.
(a) Greek and Roman
(b) Arabic and Persian
(c) English and French
(d) Arabic and Urdu
Answer:
(b) Arabic and Persian

(e) We get information about the rule of Chhatrapati Shivaji Maharaj from ……………….. .
(a) Bhausahebanchi Bakhar
(b) Panipatachi Bakhar
(c) Sabhasad Bakhar
(d) Holkaranchi Bakhar
Answer:
(c) Sabhasad Bakhar

(f) ‘Bhausahebanchi Bakhar’ describes Battle of ……………….. .
(a) Raigad
(b) Panipat
(c) Plassey
(d) Vasai
Answer:
(b) Panipat

(g) The first book written by a British historian on Indian history is ……………….. .
(a) The History of India
(b) The History of Maharaj
(c) The History of British India
(d) The Sacred Books of the East
Answer:
(c) The History of British India

(h) Nilkanth Janardan Kirtane and V.K. Rajwade exposed the limitations in writings of ……………….. .
(a) Friedrich Max Muller
(b) Colonel Todd
(c) Grant Duff
(d) William Wilson Hunter
Answer:
(c) Grant Duff

(i) …………………, an Indian historian played a major role in establishing subaltern history as an important academic school of historiography.
(a) Comrade Sharad Patil
(b) Ranjit Guha
(c) Dharmanand Kosambi
(d) Ram Sharan Sharma
Answer:
(b) Ranjit Guha.

(j) The writings of British officials on India display strong influence of ……………….. .
(a) Marxism
(b) Colonalism
(c) Feminism
(d) Capitalism
Answer:
(b) Colonalism

(k) The Nationalistic Historiography in Maharashtra was inspired by works of ……………….. .
(a) Vinayak Damotfar Savarkar
(b) Ramkrishna Gopal Bhandarkar
(c) Vishnushastri Chiplunkar
(d) Justice Mahadev Govind Ranade
Answer:
(c) Vishnushastri Chiplunkar

(l) The two volumes written by ……………….. on Indian history show impartial treatment of the subject.
(a) Colonel Todd
(b) William Wilson Hunter
(c) Grant Duff
(d) James Mill
Answer:
(b) William Wilson Hunter

(m) ‘Primitive Communism to Slavery’, represents ……………….. the historiography.
(a) Colonial
(b) Orientalist
(c) Nationalistic
(d) Marxist
Answer:
(d) Marxist

(n) ‘Stripurush Tulana’ was written by ……………….. is acknowledged as first feminist book in India.
(a) Meera Kosambi
(b) Dr. Sharmila Rege
(c) Tarabai Shinde
(d) Pandita Ramabai
Answer:
(c) Tarabai Shinde.

Question 7.
Identify the wrong pair and write it:
(1)

Name of the Book	Types of Historiography
(1) Who were the	(a) Subaltern history
Shudras	(July ’19)
(2) Stripurush Tulana	(b) Feminist writing
(3) The Indian War of Independence	(c) Marxist History
(4) Grant Duff	(d) Colonial History

Answer:
Wrong pair: The Indian War of Independence – Marxist History.

(2)

Name of the Book	Historian
(1) The Rise of the Maratha Power	(a) Justice Mahadev Govind Ranade
(2) Marathyanchya Itihasachi Sadhane	(b) Vishnushastri Chiplunkar
(3) Maratha Riyasat	(c) Govind Sakharam Sardesai
(4) Gulamgiri	(d) Mahatma Phule

Answer:
Wrong pair: Marathyanchya Itihasachi Sadhane- Vishnushastri Chiplunkar.

(3)

Work	Scholars
(1)  Bharat Itihas Samshodhak Manda	(a)   V. K. Rajwade
(2)  Asiatic Society	(b)   Sir William Jones
(3)  Inspiration for Nationalistic historiography	(c)  Vishnushastri Chiplunkar
(4)  Discovery of Harappan Civilization	(d)  James Mill

Answer:
Wrong pair: Discovery of Harappan CIvilization – James Mill.

(4)

Historiography	Historian
(1) Nationalistic Historiography	(a) V. D. Savarkar
(2) Marxist Historiography	(b) Damodar Kosambi
(3) Subaltern Historiography	(c) Ramchandra Guha
(4) Feminist Historiography	(d) Sharmila Rege

Answer:
Wrong pair: Subaltern Historiography – Bamchandra Guha.

Question 8.
Do as directed:
(1)

Answer:

(2)

Answer:

(3) Prepare a flow chart on Literary work of Max Muller:
Answer:

Question 9.
Explain the concepts:
(a) Colonial Historiography:
Answer:

• The history written by British officers and Christian missionaries in support of British rule and colonialism is known as Colonial historiography.
• It reflected their prejudiced mindset about Indian culture. They ridiculed the Indian culture as being primitive.
• Their writings justified the colonial British rule.
• The distinct example of colonial historiography is ‘Cambridge History of India’ in five volumes published during 1922-1937.

Question 10.
Write short notes:
(a) Alexander Cunningham:
Answer:

• British rulers started archaeological exploration and research in India in the 20th century.
• They established the Archaeological Survey of India and appointed Sir Alexander Cunningham as its first Director General.
• He mainly chose the sites mentioned in the Buddhist texts for excavations.
• Many other ancient sites were excavated under his supervision.

(b) James Mill:
Answer:

• James Mill, a‘British historian, had written the monumental book ‘The History of British India’. He published it in three volumes in 1817.
• The book is important as it was the first book written by a British officer on Indian history.
• The book: lacks objective perspective and is prejudiced about various aspects of the Indian culture.

(c) Grant Duff:
Answer:

• Grant Duff, a British officer, wrote the book ‘A History of Mahrattas’, in three volumes.
• His name stands out among the British officers who wrote about Maratha history.
• The tendency of the British historians to condemn Indian culture and history is found in Grant Duff’s writing.
• Historians Nilkanth Janardan Kirtane and Vishwanath Kashinath Rajwade exposed the limitations of Grant Duff’s writings.

(d) Indian Feminist Historiography:
Answer:

1. Tarabai Shinde, Pandita Ramabai and Dr. Rukhamabai were feminist historians before independence.
2. They wrote about employment of women, their right to political equality, treatment meted out to women at their workplace and gender discrimination.
3. A lot of literature is available unfolding the viewpoint of Dalit women on problems like social class, caste, etc. In the post-independence era.
4. Dr. Sharmila Rege included her essays on the autobiographies of Dalit women in her book, ‘Writing Caste, Writing Gender: Reading Dalit Women’s Testimonies.’
5. Meera Kosambi’s book, ‘Crossing Thresholds: Feminist Essays in Social History’ contains essays on the life stories of women like Pandita Ramabai and Dr. Rukhamabai, the first practising lady Doctor of India.

Question 11.
Explain the following with reasons:
(a) The history of Indian civilization dates back to 3rd millennium BCE.
Answer:

• Indian civilisation is among the various ancient civilisations in the world.
• Excavations at Harappa took place in 1920 under the supervision of Sir John Marshall, then Director General of Archaeological Survey of India (ASI). This led to the discovery of Harappan Civilization.
• This discovery prqved helpful to trace the antiquity of Indian history which dates back 3rd millennium BCE or earlier.

(b) It became necessary to rethink of women’s position in history.
Answer:

• For a considerable period of time, mainly male scholars were involved in the writing of Indian history.
• It was obvious that the perspective was male-dominated.
• The work of the women historians was neglected for long. So it became important to highlight this fact.
• It was a huge challenge in front of the women: historians to compile the work and do research which would prove to be a medium to put forth their status in society.

Hence, it became necessary to rethink about the position of women in history.

(c) Govind Sakharam Sardesai was addressed as ‘Riyasatkar’.
Answer:

• Govind Sakharam Sardesai had a momentous achievement to his credit by publishing ‘Maratha Riyasat’.
• He published several volumes of Maratha history.
• His work became so popular that people began to address him as ‘Riyasatkar’.

Question 12.
Answer the following in 25-30 words:
(a) Which things are included in the description by Emperor Babur in bis autobiography?
Answer:
Babur, the founder of the Mughal empire, in his autobiography entitled Tuzuk-i-Babari describes:

• The battles fought by him.
• Recordings of minute observations of various regions and cities visited by him noting minute observations.
• Observation of the local customs, economy, fauna and flora of the region travelled by him.

(b) What is the contribution of Swatantryaveer Savarkar to nationalistic historiography?
Answer:

1. The writings of Swatantryaveer Savarkar were infused with nationalistic ideas. He looked at the revolt of 1857 as the First War of Independence and wrote the ‘book ‘The Indian War of Independence, 1857’.
2. His book gave inspiration to Nationalistic historiography which helped in triggering independence movement of the Indian people against the British. Even the writing of regional history got momentum.
3. The attention of historians was drawn towards the history and geographic conditions and variations in the South Indian region.

(c) Write about the contribution of Banabhatta in writing historiographies.
Answer:

• It was considered an important step in the Indian historiography to write biographies of kings and dynastic histories.
• Banabhatta wrote Harshacharit, King Harsha’s biography, in the 7th century C.E.
• It portrays a realistic picture of the social, economic, political, religious and cultural life during the period when King Harsha ruled.

(d) Write information on ‘Rajtarangini’.
Answer:

• Rajtarangini was written by Kalhana in the 12th century C.E. It traces the history of Kashmir.
• These eight books contain records of dynasties which ruled Kashmir, local traditions, coins, remains of monuments and inscriptions. Kalhana wrote the text after critically examining the various sources.
• The book is a good example to show how scientific technique is applied in writing history.

(e) Write about historiography in the post-independence period.
Answer:

• In the post-independence period, along with dynastic history, cultural, social and economic histories were also written.
• New schools of thought like Marxist, Subaltern and Feminist History were included in historiography.
• The scholars in this era began to feel the need of writing histories of various communities, sciences, economic systems, political ideologies, cultural aspects, etc.
• They presented the new schools of ideologies. These changes increased the scope of writing historiography.

(f) What are the objectives of writing history according to Ziauddin Barani?
Answer:

• Ziauddin Barani explained the ’ objectives of historiography. According to him, the duty of a historian does not end with recording the ruler’s valour and welfare policies.
• He should also write about the ruler’s failings and incorrect policies.
• He further adds that a historian should also take into account the impact of the teachings of the wise, the learned and the saints on the cultural life of people.

Thus, Ziauddin Barani holds important place as he expanded the scope of historiography.

(g) What are the salient features of writings of historians in the courts of Mughal emperors?
Answer:
The salient features of writings of historians in the courts of Mughal emperors are:

• Historians praised the Mughal emperors in their writings.
• Their loyalty towards the rulers is exhibited.
• The custom of adding suitable poetic quotes was introduced. The historians started to include beautiful pictures as well.

(h) Write about the importance of Tarabai Shinde in writing feminist historiography. *
Answer:

• Tarabai Shinde has a prominent place among the feminist historians who wrote about women in the nineteenth century, i.e. pre-independence era.
• She wrote a book Stripurush Tulana which was published in 1882. It is acknowledged as the first feminist book published in India.
• Her writings attacked the male-dominated social system and the caste system.

Question 13.
Read the given passage and answer the questions given below:
(a) Complete the graphical presentation:

Answer:

(b) What was considered more important by the historians in the Mughal Court?
Answer:
Praising the Mughal emperor and exhibition of loyalty was considered more 8 important by the historians in the Mughal Court.

(c) Why is Abbul Fazl’s writing considered realistic?
Answer:

• Abul Fazl’s Akbarnama reflects his critical viewpoint.
• He collected authentic historical documents for this book.
• He scrutinized these documents to affirm their reliability. Therefore, his method is looked upon as devoid of bias and hence realistic.

Question 14.
Write detailed answers to the following questions:
(a) Write information about historiography in the ancient period of India.
Answer:

• In the ancient period, stories of great deeds of ancestors, mythological lore, memories of social transitions were preserved through oral traditions.
• The art of writing was mastered by Indians as early as 3rd millennium B.C.E. But Harappan script is not deciphered yet.
• The earliest written documents found in India were in the form of inscriptions that are as old as 3rd century B.C.E. during the period of Emperor Ashok. His edicts are inscribed on natural rocks and stone pillars.
• Inscriptions started to occur on coins, metal images and sculptures and also on copper plates from the 1st century B.C.E.
• Epics like Ramayana, Mahabharat, Puranas, Jain and Buddhist texts are important sources of ancient Indian literature.
• Historical accounts by Indian authors and travelogues by foreign travellers are also important sources of history.

(b) Explain the works of Dr. Babasaheb Ambedkar and Mahatma Phule in Subaltern History.
Answer:

• History of the deprived classes expressed in folklore was known as ‘Subaltern History’.
• Similar thoughts were expressed by Mahatma Jotirao Phule and Dr. Babasaheb Ambedkar.
• Mahatma Phule unfolded the history of the Shudratishudra communities in his book ‘Gulamgiri’.
• He drew attention to show how women, Shudras and Atishudras were exploited under the name of religion.
• Dr. Ambedkar focused on the idea that in spite of having a significant role in shaping the cultural and political aspects of India, the role of Dalits was not duly acknowledged in colonial and nationalistic historiography.
• Injustice done to the Dalits was mostly written by him. ‘Who Were the Shudras’ and ‘The Untouchables’ are his books which can be cited as examples of subaltern history.

Question 15.
Observe the given picture and answer the question given below:

(a) Write a short note on Copper-plate inscriptions.

Answer:

• The copper-plate shown in the picture was found at Sohagaura in Gorakhpur district in Uttar Pradesh.
• It is supposed to be from the Mauryan period and the inscription on it is in Brahmi script.
• Many symbols are inscribed on it ‘Tree-in-railing’ and ‘Mountain’ at the beginning of inscription occur on punch marked coins.
• A structure created on four pillars is indicative of a granary.
• The inscriptions have a record of royal order that the grains stored in the granary should be distributed carefully.
• This order is suggestive of precautionary measures taken during famine.

Balbharti Maharashtra State Board Class 10 Maths Solutions covers the Practice Set 3.4 Algebra 10th Class Maths Part 1 Answers Solutions Chapter 3 Arithmetic Progression.

Practice Set 3.4 Algebra 10th Std Maths Part 1 Answers Chapter 3 Arithmetic Progression

Question 1.
On 1^st Jan 2016, Sanika decides to save ₹ 10, ₹ 11 on second day, ₹ 12 on third day. If she decides to save like this, then on 31st Dec 2016 what would be her total saving?
Solution:

∴ Sanika’s total saving on 31^st December 2016 would be ₹ 70455.

Question 2.
A man borrows ₹ 8000 and agrees to repay with a total interest of ₹ 1360 in 12 monthly instalments. Each instalment being less than the preceding one by ₹ 40. Find the amount of the first and last instalment.
Solution:
i. The instalments are in A.P.
Amount repaid in 12 instalments (S12)
= Amount borrowed + total interest
= 8000 + 1360
∴ S₁₂ = 9360
Number of instalments (n) = 12
Each instalment is less than the preceding one by ₹ 40.
∴ d = -40

∴ Amount of the first instalment is ₹ 1000 and that of the last instalment is ₹ 560.

Question 3.
Sachin invested in a national saving certificate scheme. In the first year he invested ₹ 5000, in the second year ₹ 7000, in the third year ₹ 9000 and so on. Find the total amount that he invested in 12 years.
Solution:
i. Amount invested by Sachin in each year are as follows:
5000, 7000, 9000, …
The above sequence is an A.P.
∴ a = 5000, d = 7000 – 5000 = 2000, n = 12

∴ The total amount invested by Sachin in 12 years is ₹ 1,92,000.

Question 4.
There is an auditorium with 27 rows of seats. There are 20 seats in the first row, 22 seats in the second row, 24 seats in the third row and so on. Find the number of seats in the 15th row and also find how many total seats are there in the auditorium?
Solution:
i. The number of seats arranged row-wise are as follows:
20, 22, 24,
The above sequence is an A.P.
∴ a = 20, d = 22 – 20 = 2, n = 27

ii. t_n = a + (n – 1)d
∴ t₁₅ = 20 + (15 – 1)2
= 20 + 14 × 2
= 20 + 28
∴ t₁₅ = 48
∴ The number of seats in the 15^th row is 48.

∴ Total seats in the auditorium are 1242.

Question 5.
Kargil’s temperature was recorded in a week from Monday to Saturday. All readings were in A.P. The sum of temperatures of Monday and Saturday was 5°C more than sum of temperatures of Tuesday and Saturday. If temperature of Wednesday was -30° Celsius then find the temperature on the other five days.
Solution:
Let the temperatures from Monday to Saturday in A.P. be
a, a + d, a + 2d, a + 3d, a + 4d, a + 5d.
According to the first condition,
(a) + (a + 5d) = (a + d) + (a + 5d) + 5°
∴ d = -5°
According to the second condition,
a + 2d = -30°
∴ a + 2(-5°) = -30°
∴ a – 10° = -30°
∴ a = -30° + 10° = -20°
∴ a + d = -20° – 5° = – 25°
a + 3d = -20° + 3(- 5°) = -20° – 15° = -35°
a + 4d = -20° + 4(-5°) = -20° – 20° = -40°
a + 5d = -20° + 5(-5°) = -20° – 25° = -45°
∴ The temperatures on the other five days are
-20°C, -25° C, -35° C, -40° C and -45° C.

Question 6.
On the world environment day tree plantation programme was arranged on a land which is triangular in shape. Trees are planted such that in the first row there is one tree, in the second row there are two trees, in the third row three trees and so on. Find the total number of trees in the 25 rows.
Solution:
i. The number of frees planted row-wise are as follows:
1,2,3,…
The above sequence is an A.P.
∴ a = 1, d = 2 – 1 = 1,n = 25

∴ The total number of trees in 25 rows are 325.

Balbharti Maharashtra State Board Class 10 History Solutions Chapter 8 Tourism and History Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 10 History Solutions Chapter 8 Tourism and History

Question 1.
(A) Choose the correct option from the given options and complete the statement.
(1) Thomas Cook established a travel agency selling ……………………….. .
(a) handicrafts
(b) toys
(c) food items
(d) tourist tickets
Answer:
(d) tourist tickets

(2) Bhilar is known as the ‘Village of ……………………….. .
(a) books
(b) plants
(c) mangoes
(d) forts
Answer:
(a) Books

(B) Identify and write the wrong pair in the following set.
(1) Matheran – Hill Station
(2) Tadoba – Rock-cut Caves
(3) Kolhapur – Pilgrim Centre
(4) Ajanta – World Heritage
Answer:
(2) Wrong Pair: Tadoba – Rock-cut Caves

Question 2.
Explain the following statements with reasons.
(1) The number of people travelling back and forth from India has increased considerably.
Answer:

• It has become easier to travel because of the easy availability of a number of options like railway, marine and air services.
• Marine has linked the coastal regions. Aviation has brought the entire world closer.
• The economic liberalisation policy of the Indian government has made the travel more easy.
• People travel for studies, relaxation, sightseeing and professional assignments (meetings, etc.), also for shooting films. Therefore, there has been a considerable increase in the number of people travelling back and forth from India.

(2) It is important to take a few primary precautions in order to preserve the historical heritage sites.
Answer:
India has rich natural and cultural heritage. In order to preserve the historical sites following precautionary measures should be taken.

• Avoid vandalising or defacing the heritage monuments and sites.
• To refrain from activities like writing on the wall or carving on the trees.
• Ancient monuments should not be painted in garish colours.
• Lack of good amenities in the precints of the heritage sites causes filthiness. Proper amenities should be provided.
• Heritage monuments like forts and other monuments are testimonies of our glorious past and they serve as guide for future generations.

Therefore, they should be preserved..

Question 3.
Write short notes :
(1) Tradition of Travelling
Answer:

• The tradition of traveffing from one corner to another is not new.
• It existed in India since ancient times.
• In stone age, man was constantly on the move in search of food but that was just wandering not travelling.
• India has got a rich tradition of travelling.
• People go for local fairs, temple fairs, festivals and pilgrimage which comes under cultural tourism.
• People travelled long distance for education and trade.
• Many students visited Nalanda, Takshshila universities in the past.
• As travelling is a natural instinct in man, the tradition of travelling for various reasons is prevalent since ancient times.

(2) Marco Polo
Answer:

• Marco Polo was born in a business family in the Italian city of Venice in 1254 CE.
• He was the first European traveller to reach China taking the silk route.
• His travelogue introduced Asia, especially China to Europe.
• He wrote about the rich flora and fauna, social life, information on culture and trade system in Asia.
• His writings initiated trade between Europe and Asia.

(3) Agro-tourism
Answer:
Visit to agricultural centres and agricultural universities comes under agro-tourism.

1. In recent times lot of research is conducted in the agricultural field. Many new agricultural universities and research centres are formed in India.
2. Projects are undertaken to inform farmers about suitable soil for their crops, organic manures, earthworm compost, etc. Sikkim state is the first organic state of India.
3. Though it receives less rainfall, Israel has made a lot of development in agricultural sector. To obtain information on novel techniques in farming and on projects started, students and city people travel to places.
4. As urban population has very little exposure to rural life and agriculture, agro-tourism is developing rapidly.

Question 4.
Answer the following questions in detail.
(1) What are the crucial issues in the development of tourism?
Answer:
In modern times, tourism is not limited to being a job-oriented profession but it also contributes to the nation’s development.

• Safety of the tourists and secure transport facilities should be given utmost preference.
• Availability of good accommodation and amenities of reasonably good standard should be made available.
• Good washroom facilities oq, the travel routes and at tourists sites should be provided.
• Pamphlets, guides, maps should be made available to the tourists, preferably in their own language.
• It would be helpful if taxi drivers are trained to converse in more than one languages.
• They can also be trained as tourist guides.
• Attention should be given towards the needs of specially challenged people.

(2) In what way tourism becomes a major source of their livelihood?
Answer:
In the following ways development takes place at local level because of tourism:

•  Local markets are developed in the vicinity of a tourist site.
• There is considerable increase in purchase and sales of goods liked by tourists.
• Production and sale of ethnic handicraft goods increase eventually leading to the development of these industries.
• Economic well-being of the skilled craftsmen.
• Increase in demand of locally processed food, hotel services, accommodation and in shops leads to development of these services.
• Local transport, travel agents, guides are in demand. Hence more and more employment opportunities are generated.

(3) What would you do to develop the surroundings of your village /town to help the growth of tourism?
Answer:
It is important to have an understanding of our surroundings. For that some ground work is essential.

1. Historical monuments and temples should be conserved and preserved. Boards having information on them should be put up around the city. We need to pay attention towards cleanliness.
2. Beaches should be clean as clean beaches always attract tourists.
3. Tourists are interested to see projects like earthworm composts, zero waste and working of solar power projects. If such projects are installed they become centre of major tourist attraction.
4. Similarly, tourists are interested to see local art, culture, cottage and handicraft industry. They are enthusiastic to buy locally made handicrafts as souvenirs. I feel if there is economical, geographical, cultural and educational development in our surroundings it will definitely boost tourism.

Question 5.
Complete the following Concept chart:

Answer:

Question 6.
Give elaborate answers to the following.
(1) What are the professional fields associated with tourism?
Answer:
The following fields are related to tourism:

• Hotels, lodging and boarding services.
• Shops selling food items and catering services, etc.
• A reviväl or boost to Handicraft and Cottage industiy resulting in economic well-being of the skilled craftsmen.
• Demand for industries affiliated to hotel industry like Dairy industry.
• Agro industry which supplies vegetables, fruits, fish and meat increases.
• Transport services which are required by tourists such as bus, autorickshaw and taxi, increase in numbers.
• Travel agents, photographers, guides, etc. and other professions related to tourism get a boost.

(2) Describe any three types of tourism.
Answer:
Tourism has been classified into many types, three important types of them are:
(1) Historical Tourism:

• Tourism and history are inseparable.
• The number of people visiting historical places are increasing day by day.
• Tours are arranged to see forts, battlefields which narrate stories of valour of our ancestors and monuments made by them.
• Tourists visit memorials of freedom fighters, forts built by Chhatrapati Shivaji Maharaj, palaces built by kings.
• Important places related to the Indian war of independence in 1857, and ashrams of Mahatma Gandhi and Vinoba Bhave.

Thus, this type of historical tourism is popular all around the world.

(2) Geographic Tourism:
Sea beaches, mountain ranges, valleys, snow-capped peaks, pristine jungles, sanctuaries, lakes formed because of meteor impact, waterfalls, form wealth of a nation. People enjoy nature and feel a natural attraction towards it. People around the world visit 8 such places out of curiosity or for leisure.

(3) International Tourism:

• International tourism is on the rise in modern times because of availability of transport facility.
• International tourism is on the rise because people travel for various reasons like international literary conferences, world summits, meetings, business deals, site seeing and visit to religious places.
• International seminars and conferences are held.
• Film festivals are arranged. Such events promote international tourism.

Project
Explain the need to preserve the heritage sites. What measures are required to achieve it? Discuss.

Question 7.
Complete the sentences by choosing the correct option:
(a) The Chinese monk …………………….. travelled in India in 630 C.E.
(a) Hiuen Tsang
(b) Yuan Shwcmg
(c) Fa-Hien
(d) Ho Chi Minh
Answer:
(b) Yuan Shwang

(b) The number of people travelling back and forth from India has increased considerably because of …………………….. .
(a) India’s first war of Independence
(b) India’s independence
(c) Economic liberalisation
(d) Good railway services
Answer:
(c) Economic liberalisation

(c) …………………….. used to arrange hiking tours in Maharashtra to explore the sights closely linked to Chhatrapati Shivaji Maharaj.
(a) N.S. Incim dar
(b) Ranjit Desai
(c) Vishnubhcrt Godse
(d) Gopal Neelkanth Dandekar
Answer:
(d) Gopal Neelkanth Dandekar.

(d) In order to provide good’ amenities on the pilgrim routes like Chardham Yatras and Bara Jyotirlings …………………….. has spent from her personal funds.
(a) Queen Lakshmibcri
(b) Ahilyabai Holkar
(c) Nanasaheb Peshwa
(d) Vshunbhat Godse
Answer:
(b) Ahilyabai Holkar

(e) A visit to …………………….. at Nighoj in Maharashtra is geographic tourism.
(a) palace
(b) fort
(c) ranjankhalage
(d) temple
Answer:
(c) ranjankhalage

(f) …………………….. has conducted experiments of advanced technology in agriculture.
(a) Egypt
(b) Jordan
(c) Italy
(d) Israel
Answer:
(d) Israel

(g) Travelling to attend events like Maharashtra Kesari is known as ……………………. .
(a) Geographic Tourism
(b) Health Tourism
(c) Agro Tourism
(d) Sports Tourism
Answer:
(d) Sports Tourism

(h) …………………….. successfully circumnavigated Europe.
(a) Marco Polo
(b) Thomas Cook
(c) Benjamin of Tudela
(d) Gerardus Mercator
Answer:
(b) Thomas Cook.

Question 8.
Identify the wrong pair in the following, and write it:
(1)

(1) Matheran	Hill Station
(2) Tadoba	Rock-cut Caves
(3) Kolhapur	Pilgrim Centre
(4) Ajanta	World Heritage

Answer:
Wrong Pair: Tadoba – Rock-cut Caves

(2)

(1) First Cartographer who made world map	Thomas Cook
(2) First European discoverer	Benjamin of Tudela
(3) Italian traveller who introduced China to Europe	Marco Polo
(4) Traveller who travelled extensively in Islamic world	Ibn Batuta

Answer:
Wrong Pair: First Cartographer who made world map – Thomas Cook

(3)

Place	Popular for
(1)  Lonar (2)  Jayakwadi (3)  Gharapuri (4)  Jantar Mantar	Lake Hill Station Rock-cut Caves Observatory

Answer:
Wrong Pair Jayakwadi – Hill Station

(4)

(1) Gharapuri (Elephanta)	Cave
(2) Pandharpur	Pilgrim centre
(3) Sagareshwar	Dam
(4) Panchgani	Hill station

Answer:
Wrong Pair: Sagareshwar – Dam

(5)

(1) Chikhaldara	Hill station
(2) Tuljapur	Pilgrim centre
(3) Sagareshwar	Sanctuary
(4) Tadoba	Rock-cut Caves

Answer:
Wrong Pair: Tadoba – Rock-cut Caves

Question 9.
Do as directed:
(1)

Answer:

(2)

Answer:

(3)

Answer:

Question 10.
Explain the concept:
(1) Tourism:
Answer:

1. Visiting places in distant regions with a specific purpose is known as Tourism.
2. Tourism can also be defined as going for local fairs, festivals, pilgrimage, entertainment, leisure, historical or places of natural beauty. Man has a natural instinct to travel.
3. Travelling is an old tradition which has undergone changes with time. In modern times, tourism has changed in its nature and form.
4. Tourism expands from the local to the international level. As tourism develops it opens the doors of development for a country.

(2) Religious Tourism:
Answer:

1. When people travel individually or in groups on a pilgrimage, it is known as Religious Tourism. Religious seminars, pilgrimages, religious festivals and travel on occasions to bathe in holy rivers come under religious tourism.
2. Gautam Buddha and Buddhist monks travelled to preach Buddhism and give discourses on Dhama. In the same way, Shankarachaya had travelled to spread Hinduism. St. Francis Xavier along with his followers travelled all over India to preach Christianity.
3. People in Maharashtra walk on foot to reach Pandharpur, Shirdi and many holy places to pay their obeisance.
4. Guru Nanak, Saint Namdev, Samarth Ramdas, as well as Yuan Shwang who came from China in 630 CE to study Buddhism in India, travelled extensively in India.

(3) Heritage Walk:
Answer:

1. Heritage walk . involves physical walking in the area-and observing the historical sites. People go for heritage walks to see historical palaces, forts and old temples.
2. The first hand experience we get is inspirational in forming an emotional connect and a long lasting impression. .
3. Many enthusiastic organisations held such heritage walks in city of Ahmadabad, Mumbai and Pune to enable the people to get glimpses of history.

(4) Cultural tourism:
Answer:

• India has rich tradition of folk arts. Festivals are arranged to promote such art forms.
• Travelling to see such festivals comes under Cultural tourism.
• Visiting historical places to get a glimpse of local culture is also cultural tourism.
• It also involves visiting reputed educational institutions and understand their traditions as well as travelling to see festivals and celebrations in different parts of the country.
• Travelling to participate in various music- dance festivals as audience is also part of cultural tourism.

Question 11.
Write short notes:
(a) Benjamin of Tudela:
Answer:

• Benjamin of Tudela is known to be the first traveller in the world. He was born in Spain.
• He travelled through Asia, Europe and Africa in between 1159-1173 C.E.
• He visited France, Germany, Italy, Greece, Syria, Arabia, Egypt, Iraq and Persia. He even visited India and China.
• He noted down his experiences and observations about people and their living style in his diaries.
• He made accurate observations about the social life in the medieval period.

Hence, his accounts are authentic and are studied by scholars studying the medieval period.

(b) Ibn Batuta:
Answer:

1. Ibn Batuta was born on 25th February, 1304 in present Morocco. He was a great 14th century traveller who travelled for 30 years. His travel accounts enabled people an insight into the Islamic world.
2. Having made’ the resolution of not taking the same route again, he travelled to South and East Africa, South and East Europe, Middle and South east Asia in the Indian subcontinent.
3. His writings are helpful for those who study medieval history and social life.
4. In his book Batuta said,’ “Travelling – it leaves you speechless, then turns you into storyteller.”

(c) Gerardus Mercator:
Answer:

• Gerardus Mercator of 16th century was the first Dutch cartographer.
• He was the first one to make a world map and globe of the earth. He made large and small maps which could be hung on a wall.
• Mercator used the word Atlas’ for the first time. He made scientific and astronomical instruments.
• His maps gave momentum to navigation around the world.

Question 12.
Explain the following statements with reasons:

(a) Maza Pravas is an important source of history.
Answer:

1. Vishnubhat Godse in his travelogue wrote about his journey to Ayodhya and back to Maharashtra.
2. He published a book, called ‘Maza Pravas’ in which he gave an eye witness account of the events which unfolded during the Indian War of Independence in 1857.
3. He gave full detailed descriptions about various incident during that period, especially on the life of the Queen of Jhansi Lakshmibai.
4. His writings give us an idea about the nature of the Marathi language in the 18th century.
   Therefore, it is considered as an important source of history.

(4) Tourism can provide a source of livelihood.
Answer:

1. Tourists visit religious, historical and places of natural beauty. Job opportunities develop to meet the requirements of the tourists.
2. Guides are required to provide information about the place. Photographers take photos of the tourists wearing local costumes. Suppliers of such dresses are required.
3. Horse carts, cabs and other means of transport are required Which gives scope for transport business. Tourists buy local handicrafts. Hence the local handicraft and cottage industry gets promoted.
4. Hotel industry gets boosted. In short, the markets near the tourist centre develop. So, tourism can be a source of livelihood for local people.

Question 13.
Answer the following questions in 20 – 25 words:

(a) Write about the work of Thomas Cook.
Answer:

• Thomas Cook started group tours on commercial basis in the latter half of the 19th century.
• He took 600 people from Leicester to Loughborough by railway.
• Later, he successfully organised a round trip of Europe.
• He opened a travel agency and sold tourists tickets. He organised affordable tours and easy travel.

Thus, his ventures opened the doors for the development of modem tourism.

(b) What are the benefits of religious tourism?
Answer:
The following are the benefits of religious tourism:

• People staying in different parts of the world come together.
• They develop ties as they share the sgme* faith and also feeling of unity develops.
• Religious places get importance and many social welfare projects are undertaken.
• As these places develop, the local business develops leading to improvement in the standard of living of the local people.

(c) Write information on the tourists places in Maharashtra.
Answer:

Caves	Ajanta and Ellora caves, Verul, Bhaje, Kanheri caves
Temples	Pandharpur, Shirdi, Jejuri, Shegaon, Tuljapur, Kolhapur, Nashik, Paithan, Dehu, Alandi, Haji Malang, Mount Mary’s Church.
Hill stations	Mahabaleshwar, Panchgani, Chikhaldara, Matheran, Lonavala, Khandala.
Dams	Koynanagar, Jayakwadi, Bhatghar, Chandoli, Panshet, Bhandara, Khadakwasla.
Sanctuaries	Dajipur Tadoba, Karnala.
Historical places	Raigad, Simhgad, Sindhudurg, Vijaydurg, Palace of Kolhapur, Janjeera, Memorials.

(d) What is Sports Tourism?
Answer:

1. Sports tourism developed in the 20th century. It involves travelling either to participate in a sporting event or to watch the event.
2. Various sports events are organised at local and state level for different inter school competitions. National level Sports Competitions are also held. International cricket, hockey and football tournaments are held at regular intervals.
3. Wimbledon, French Open, Australian Open and US Open lawn tennis tournaments are held. Every four years, Olympics and Asian Games are held in the country which is the host. Events like the Himalayan car rally at the national level and Maharashtra Kesari at the state level are held.
4. Travelling to participate in these events as players, coaches, umpires, referees, organisers or to attend them as spectators come under sports tourism.

Question 14.
Read the following passage and answer the following questions:
(a) Complete the graphical presentation:

Answer:

(b) What types of books are there in the Village of Books?
Answer:
In the Village of Books, we find books of old and new authors and saints, ranging from biographies, autobiographies, fiction, poetry literature by women, literature on sports and literature for kids. as Village of

(c) Why is Bhilar village known as Village of Books?
Answer:

• Each household in this village maintains a library of its own.
• Tourists enjoy reading these books.
• Maharashtra Government has kept these books in every household so that it becomes easy for the tourists to take and read.
• It is done with a view to accelerate the ‘Reading Culture’ movement to enjoy Marcrthi literature.

Hence, the village is known as ‘Village of Books’.

Question 15.
Give elaborate answers to the following:

(a) Explain the benefits of increasing tourism.
Answer:
Tourism not only benefits an individual but also a country.

• Tourism is an industry which has potential to generate maximum employment.
• New markets are created leading to the development of tourist sites.
• Urbanisation takes place giving rise to new colonies.
• The country earns foreign exchange.
• Handicraft and cottage industry gets a boost.
• Visiting different sites, meeting people speaking different languages and knowing different cultures increases tolerance and peace.
• We get information when we visit places of historical importance and natural beauty. It widens our perspective.
• When we visit historical places we come to know about the glorious past which gives us inspiration to build a bright future.
• It emphasises the need that we have to take care of our heritage.
• Tourism gives us a feeling of personal and collective fulfillment.

(b) Explain the purpose of tourism.
Answer:
Tourism has several purposes and inspiration behind it. They are as follows:

• To see historical monuments forts and cities discovered during excavations. To visit centres promoting ancient art and craft, museums.
• To visit different pilgrim centres, sea beaches, mountain ranges, valleys, snow-capped peaks, pristine jungles.
• To visit special plateaus like Kas plateau, museums, lakes formed because of meteoric impact and valleys of flowers.
• Places of natural beauty gives us enjoyment and experiences which connects us to nature.
• To visit different industrial sites.
• To see medicinal plants and avail of ayurvedic therapies.
• To visit places to see agricultural projects, visit to see agricultural research centres and making of compost pits.
• To travel to watch sports events which comes under sports tourism. To be. part of dance-music, festival or watch as audience, which is cultural tourism.
• People also visit places to attend film festivals, witness the making of movies, science seminars, international conferences, book exhibitions and literary events.

In short, the purpose of tourism differs from person to person. It is explored as per individual interest.

(c) What measures should be taken to conserve historical monuments?
Answer:
Historical monuments and ancient historical sources constitute our cultural heritage. The following measures should be taken to conserve them:

• Seepage of water in forts and in rock-cut caves should be stopped. Creepers which grow on forts should be uprooted.
• Damages due to humidity and heat should be stopped with proper measures.
• To take precautions to avoid deterioration of monuments near the sea because of salt.
• Hygiene should be maintained at tourist sites.
• One should be fined for writing names, carving or defacing the monument in ary manner.
• Government should take measures to avoid the monuments getting vandalised.
• Awareness should be created among the people about the need to preserve monuments.
• Along with government, people and private sectors should contribute to raise funds for the preservation of projects.

(d) Distinguish between Local tourism and International tourism.
Answer:

Local/Interstate Tourism	International Tourism
1. Travelling within our country is local tourism.	1. Crossing border and going overseas means international tourism.
2. There is no need to seek the government’s permission or paperwork.	2. Visa is required to travel to a foreign country. Visa is not granted unless we complete all paperwork. It is essential to keep documeñts with us.
3. Local tourism is hassle-free as the land is known to us.	3. Having no acquaintances with the people or land can create challenges.
4. No need for currency exchange	4. Currency exchange is required.
5. We can make changes in the itinerary to suit our convenience.	5. Fixed itinerary has to be followed. We cannot make any changes to it.
6. Language, mostly, is not an obstacle. We can communicate in our mother tongue or in the national language.	6. Language can be an obstacle. One should know the language of that country if one wants to interact with locals or at least be well versed in English.
7. We can extend our stay if we desire to.	7. Our stay in a foreign country cannot be extended. It has a fixed time duration as long as permission is granted.

(e) What facilities should be made available to the tourists?
Answer:
The following facilities should be provided to tourists:
Facilities for tourists:

• Safe and secured transport facilities, translators and guides.
• Ensure safety of the tourists.
• Good and clean hotels and eateries. Clean drinking water at various places of visit.
• Good washrooms on the travel routes and at tourists sites.
• Care should be taken that tourists do not endure physical or mental distress.
• Tourists should not be cheated when they make purchases.

(f) How would you behave with the tourists if you are the local person at a tourist site?
Answer:
Tourists visit any tourist site having faith in the local people:

• I will behave well with the tourists. I will extend my cooperation.
• I will inform them about the tourist places , known to me, which things they can buy and where.
• I will be careful that they face no problems.

(g) What kind of new occupations were introduced in the surroundings of your village/ town because of growing tourism?
Answer:
The following job opportunities were created in the surroundings of my town because of growing tourism:

• The number of tourist guides, porters increased.
• More services of autorickshaw, taxi, horse-to ride, horse carts, etc. were provided.
• New hotels and shops selling food items came up in vicinity.
• Juice and cold drink centres were started.
• Milk, vegetables and tea stalls were set up.
• New shops selling handicraft and local things opened.
• What kind of new occupations were introduced in the surroundings of your village/town because of growing tourism?
• What difference could be observed in the lifestyle of people in the surroundings of your village-town because of growing tourism?

(h) What difference can be observed in the lifestyle of people in the surroundings of your village-town because of growing tourism?
Answer:
Tourism improves standard of living of the people:

• Small towns transform into urban cities.
• Standard of living improves to great extent.
• Modern housing colonies come up in place of small houses.
• Different types of business as prosper.
• Artists get promoted which helps in sale of their artefacts.
• Number of two-wheelers and four-wheelers increase.
• I have observed these changes in the surroundings of my town.

Memory Map

Balbharti Maharashtra State Board Class 10 English Solutions Unit 4.3 World Heritage Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 10 English Kumarbharati Textbook Solutions Unit 4.3 World Heritage

Maharashtra Board Class 10 English Solutions Unit 4.3 Warming Up Questions and Answers

Question 1.
Pair up with your partner and answer the following questions.
(a) Do you like to travel?
(b) Where have you traveled?
(c) Have you heard about the wonders of the world?
(d) Have you heard about UNESCO?
(e) What does UNESCO stand for?
(f) What is meant by Heritage?
(g) Do you know of any Heritage building in your own city?
Answer:
(a) yes, no, sometimes, etc.
(b) Discuss the places, the mode of travel, the sights, etc.
(c) Yes, I have.
(d) Yes, I have, but not much.
(e) UNESCO stands for United Nations Educational, Scientific and Cultural Organization.
(f) Heritage is something that is valued and preserved because of its historical/cultural/natural importance
(g) Students can find out the heritage buildings in their own towns/cities.

Question 2.
Your teacher will explain the ‘Heritage Cycle’.
→ By understanding (cultural heritage) people value it.
→ By valuing it people want to care for it.
→ By caring for it, it will help people enjoy it.
→ From enjoying it, comes a thirst to understand.
→ By understanding it …………………

Question 3.
Do you know the difference between :
(a) World Heritage
(b) Cultural Heritage
Refer to a dictionary/encyclopedia/reference book/the internet to get the detailed meaning.
Answer:
(a) World heritage means a global heritage that belongs to everyone.
(b) Cultural heritage is the legacy of physical artifacts and intangible attributes of society that are inherited from past generations, maintained in the present and preserved for the benefit of futurft generations. Cultural heritage includes tangible culture (such as buildings, monuments, landscapes, books, works of art, and artifacts), intangible culture (such as folklore, traditions, language, and knowledge), and natural heritage (including culturally significant landscapes, etc.)

Question 4.
With the help of your partner complete the information in the table.

Tourist spot	Favourite	Why?
Park
Mountain
Beach
Sea
Forest
Countryside/Rural site

Question 5.
Heritage Sites – Rank these with your partner. Put the best at the top.

• Great Barrier Reef
• Mount Fuji
• Grand Canyon
• The Pyramids
• Panda Sanctuaries
• Machu Picchu
• Vatican City
• Great Wall of China

World Heritage Class 10 English Workshop Questions and Answers Maharashtra Board

Question 1.
Answer the following questions.
(a) What do heritage sites in the world include?
Answer:
A World Heritage Site should have significant cultural or natural importance to humanity.

(b) What kind of sites are protected and maintained by the International World Heritage Programme?
Answer:
Sites which have significant cultural or natural importance to humanity are protected and maintained by the International World Heritage Programme. They may include forests, lakes, monuments, buildings and cities. They can also be a combination of cultural and natural areas.

(c) How many world Heritage sites were there around the world?
Answer:
World Heritage Sites include forests, lakes, monuments, buildings and cities. They cari also be a combination of cultural and natural areas.

(d) What is the role of World Heritage Committees?
Answer:
World Heritage Sites are those that are significant culturally and naturally. People are interested in seeing such sites and learning the history behind them; hence they are a major tourist attraction, and they draw tourists to a country, boosting the country’s revenue.

(e) What is the texture of World Heritage Committee?
Answer:
The tenure of the World Heritage Committee is six years.

(f) What are our duties towards preservation/conservation of any historical site?
Answer:
We should see that the historical sites are not in any danger due to pollution, tourism, uncontrolled urbanization, etc. Whenever we visit the site we must maintain the cleanliness and purity of the place. We must obey whatever orders and guidelines are put in place by the authorities. We should motivate others to do so too.

(g) Why should we preserve the World Heritage Sites?
Answer:
World Heritage Sites promote tourism. They are a part of the culture of the world, a part of the past. It is essential to preserve the past in order to learn from it. Natural beauty too should be preserved so that everyone today and in future can enjoy it. Hence, we should preserve World Heritage Sites.

(h) What is the role of World Heritage Sites in developing tourism in any country?
Answer:
World Heritage Sites are those that are significant culturally and naturally. People are interested in seeing such sites and learning the history behind them; hence they are a major tourist attraction, and they draw tourists to a country, boosting the country’s revenue.

Question 2.
Complete the following.

Year	Establishment	Role
1954	…………………………………………………	…………………………………………………
1959	…………………………………………………	…………………………………………………
1965	…………………………………………………	…………………………………………………
1968	…………………………………………………	…………………………………………………
1972	…………………………………………………	…………………………………………………

Answer:

Year	Establishment	Role
1954	Egypt starts plans to build Aswan High Dam	Started the momentum for the protection of cultural and natural heritage sites around the world.
1959	International campaign by UNESCO to protect temples and artifacts likely to be destroyed by Aswan High Dam; a draft convention initiated for the same	Protection of natural and cultural sites around the world
1965	A White House Conference in the US called for a World Heritage Trust’.	To protect not only the historic and cultural sites but also the significant natural and scenic sites around the world.
1968	The International Union for Conservation of Nature	Development of goals similar to those of the White House Conference
1972	Convention concerning the protection of World Cultural and Natural Heritage adopted by UNESCO’s General Conference.	To protect not only Are histone and cultural sites but also the significant natural and scenic sites around the world.

Question 3.
Complete the following by giving reasons why World Heritage Sites are in danger.

Answer:

Question 4.
Choose the correct alternative and complete the given sentences.
(a) Mount Huangshan is situated in …………………………. .
(i) Japan
(ii) China
(iii) Philippines
Answer:
(ii) China

(b) The famous dam situated in Egypt on River Nile is …………………………. .
(i) Buzwaa High Dam
(ii) Rizwa High Dam
(iii) Aswan High Dam
Answer:
(iii) Aswan High Dam

(c) The conference based on Human Environment was held at …………………………. .
(i) Athens, Greece
(ii) Mascow, Russia
(iii) Stockholm, Sweden
Answer:
(iii) Stockholm, Sweden

(d) The highest number of world Heritage Sites are located in …………………………. .
(i) France
(ii) Italy
(iii) Germany
Answer:
(ii) Italy

(e) …………………………. can delete/exclude a site from World Heritage list.
(i) World Heritage Committee
(ii) World Peace Committee
(iii) World Health Committee.
Answer:
(i) World Heritage Committee

(f) The tenure of World Heritage Committee is …………………………. years.
(i) Four
(ii) Five
(iii) Six.
Answer:
(iii) Six.

Question 5.
Match the pairs to define different roles of the World Heritage Sites.

	A		B
(i)	Identify cultural and natural sites	a	green, local based, stable and decent jobs.
(ii)	Identify sites of	b	of outstanding universal value across countries.
(iii)	Identify sites that represent	c	preserve outstanding sites and natural resources.
(iv)	UNESCO seeks to	d	tourism.
(v)	World Heritage Sites should have	e	an asset for economic development and investment.
(vi)	World Heritage Sites should	f	protect these sites.
(vii)	World Heritage Sites serve as	g	best examples of world’s cultural and/or natural heritage.
(viii)	World Heritage Sites should ensure	h	special importance for everyone.
(ix)	It should at large develop	i	relevant development plan policies.

Answer:

‘A’	‘B’
(1) Identify cultural and natural sites	(a) green, local based, stable and decent.
(2) Identify sites of	(b) of outstanding universal values across countries.
(3) Identify sites that represent	(c) preserve outstanding sites and natural resources.
(4) UNESCO seeks to	(d) tourism.
(5) World Heritage Sites should have	(e) an asset for economic development and investment.
(6) World Heritage should	(f) protect these sites.
(7) World Heritage Sites serve as	(g) best examples of world’s cultural and or natural heritage.
(8) World Heritage Site should ensure	(h) special importance for everyone.
(9) It should at large develop	(i) relevant development plan policies.

Question 6.
Look at the words and their meanings. Choose the correct alternative.
(a) determine :
(i) think over
(ii) decide
(iii) ask for
(iv) look over
Answer:
(ii) decide

(b) monument :
(i) statue
(ii) pillar
(iii) memorial
(iv) fort
Answer:
(iii) memorial

(c) significant:
(i) clever
(ii) effective
(iii) systematic
(iv) important
Answer:
(iv) important

(d) disaster:
(i) problem
(ii) incident
(iii) calamity
(iv) accident
Answer:
(iii) calamity

Question 7.
Find from the text minimum 8 words related to cultural heritage and make a word register. Arrange them in alphabetical order.
Cultural heritage: Abu Simbel Temples, artifacts, buildings, cilles, Histqric Center of Vienna, Machu Picchu, monuments, Mount Huangshan, Sydney Opera House.

Question 8.
Complete the following information from the text.

Answer:
(a) Preservation of any historical site (Duties):
(i) International World Heritage Programme
(ii) UNESCO World Heritage Committee.

(b) Preserving World Heritage Sites (Reasons) :
(i) They have significant cultural and natira Importance to humanity.
(ii) They promote tourism.

(C) Promoting tourism (Role) :
(i) They attract tourists.
(ii) They help one to understand the history of a place.

Question 9.
Write a report on any tourist place/historical place/World Heritage Site you recently visited using the points given below.
(i) Title
(ii) Place/Location
(iii) Background/History
(iv) Features/Specialities
(v) Security policies
(vi) Sign boards and discipline
(vii) Overall scenario.
Answer:
Ajanta – A Masterpiece In Rock
– Rani Iyer
Mumbai, 12 February: The Ajanta Caves, situated in the Deccan in Maharashtra and about 110 km from Aurangabad, are a UNESCO World Heritage Site. A visit to the place reveals a large slice of history.

These rock – cut cave temples and monasteries of Buddhists date back to around 2nd century BCE. Since they were in the jungles, cut into a mountainside, the external world did not know about them for a long time. They were discovered only in the 19th century, The caves include paintings and rock – cut sculptures described as among the finest surviving examples of ancient Indian art. The paintings are expressive and present emotion through gesture, pose and form, According to UNESCO, these are masterpieces of Buddhist religious art that influenced the Indian art I that followed.

Two new visitor centers provide extensive information about the heritage site using audiovisual media. Local staff is employed for security purposes. Though photography is allowed at certain places, with fees for the use of a camera, use of tripods and flash is prohibited. Signboards and brochures/leaflets provide information about the care to be taken to preserve this UNESCO protected heritage site. “The caves are now being looked after by a private company under the Indian government’s ‘Adopt a Heritage Site’ program,” said a senior official.

Question 10.
(A) Use ‘not only but also’ in the following sentences.
(a) UNESCO and the International Council on monuments initiated a draft convention to create an international organisation responsible for protecting cultural heritage.
(b) The state parties are responsible for identifying and nominating new sites.
(c) Opera House in Australia and the Historic Center of Vienna in Austria are cultural sites of World Heritage.
(d) World Heritage Sites can also be a combination of both cultural and natural areas.
Answer:
(a) Not only UNESCO but also the International Council on Monuments and Sites initiated a draft convention to create an international organization responsible for protecting cultural heritage.
(b) The State Parties are responsible for not only identifying but also nominating new sites.
(c) Not only the Opera House in Australia but also the Historic Center of Vienna in Austria are cultural sites of World Heritage.
(d) World Heritage Sites can be a combination of not only cultural but also natural areas.

(B) Rewrite the following sentences replacing ‘as soon as’ by ‘No sooner than’
(Note : The phrase, ‘No sooner’ must always be followed by an auxiliary (helping verb).)
For example : As soon as he came, they all gave an applause.
No sooner did he come, than they all gave an applause.

(a) As soon as the Bill is passed, it will become an Act.
(b) As soon as the thief escaped, the family informed the police.
(c) As soon as you have finished, you can submit your answer- papers.
(d) As soon as they can manage, they should change their house.
(e) As soon as the bell rings, the School Assembly will start.
Answer:
(a) No sooner is the Bill passed, than it will become an Act.
(b) No sooner did the thief escape, than the family informed the police.
(c) No sooner do you finish, than you can submit your answer papers.
(d) No sooner can they manage, than they should change their house.
(e) No sooner does the bell ring, than the School Assembly will start.

Question 11.
Identify whether the following sentences are Simple (One Subject + One Predicate or Complex (One Main Clause + One or more Dependent Clauses) or Compound (Combination of 2 or more Independent/ Co-ordinate Clauses).
(1) They vary in type but they include forests, monuments etc.
(2) The mountain is significant because of its characteristics.
(3) To protect the temples and artefacts, UNESCO launched an international campaign.
(4) If the site meets with this criteria, it can be inscribed on the World Heritage List.
(5) There are 890 World Heritage Sites that are located in 148 countries.
(6) The project cost about US $ 80 million and $ 40 million came from 50 different countries.
Answer:
(1) Compound
(2) Simple
(3) Simple
(4) Complex
(5) Complex
(6) Compound

Question 12.
Following are the ways to preserve ‘World Heritage Sites.’ Transfer these points into a small paragraph. Suggest a title.

• Practical conservation of posterity
• Human/animal trespassing to be prohibited
• Monitored/controlled/restricted access
• Threat of local administrative negligence to be removed

Answer:
Ways to Preserve World Heritage Sites
World Heritage Sites need to be preserved for posterity. The future generations must know about their history and culture. For this purpose, steps have to be taken to preserve these sites. First and foremost, trespassing by either humans or animals should be strictly prohibited. Access to these sites for tourists, vendors, officials and the general public should be restricted or monitored carefully. Another important step is to keep a check on the local administration of the site, so that negligence in the performance of the duties at this level is ruled out.

Question 13.
Read the points given in column ‘A’ specifying Dos towards prevention of any historical site. Write Don’ts in column ‘B’ specifying things that should not be done.

	Dos	Don’ts
(i)	Obey rules and regulations.
(ii)	Maintain discipline and order.
(iii)	Maintain cleanliness.
(iv)	Use dustbins and garbage bags.
(v)	Observe silence.
(vi)	Maintain environmental safety.
(vii)	Protect our country’s heritage.

Answer:

Dos	Don’ts
1. Obey rules and regulations.	1. Don’t dirty the surroundings.
2. Maintain discipline and order.	2. Don’t write on the walls/trees.
3. Maintain cleanliness.	3. Don’t pluck flowers/ destroy plants.
4. Use dustbins and garbage bags.	4. Don’t smoke/ drink alcohol.
5. Observe silence.	5. Don’t play loud music or make a loud noise.
6. Maintain environmental safety.	6. Don’t defecate in the open.
7. Protect our country’s heritage.	7. Don’t trespass.

Question 14.
Complete the following flow chart by choosing the option given below to show how any site of any country can become a World Heritage Site.

Options :
1. Inclusion of the name of site from tentative list to the nomination file.
2. Name of the site is inscribed on the World Heritage List after meeting the criteria.
3. Inclusion of the name of site for the nomination in a tentative list after an inventory in country or State.
4. Decision of the World Heritage Committee after review of the nominated file.
5. A review of the included file by the advisory bodies.
Answer:
Step 1 : Inclusion of the name of the site for nomination in a tentative list after inventory in country or state.
Step 2 : Inclusion of the name of site from tentative list to the nomination file.
Step 3 : A review of the included file by the advisory bodies.
Step 4 : Decision of the World Heritage Committee after review of the nominated file.
Step 5 : Name of the site inscribed on the World Heritage List after meeting the criteria.

Question 15.
Projects :
(a) Make a list of sites from our State which are included in the World Heritage Sites. Try to visit one of them. Write the importance of this World Heritage Site. Also write your impression of it in your notebook.

(b) Write a ‘tourism leaflet’ on any one of the following :
(i) Your home town
(ii) A historical place
(iii) A place of natural beauty
(iv) A place of pilgrimage

→ Make use of the following points :
(i) How to reach there?
(ii) Accommodation facilities
(iii) What to see and visit?/Attractions of the place
(iv) Places of interest nearby
(v) Best time to visit
(vi) Shopping Attractions
Add your own points.
Answer:
MATHERAN: ‘UNSPOILT NATURE’
(1) How to get there:
(a) By train: From Mumbai or Pune to Neral Junction.. From Neral to Matheran by narrow – gauge train that depart at fixed times.
(b) By road: Shared taxis or minibuses from Neral to MTDC Holiday Camp. Cars and other vehicles not allowed beyond a certain point.
(2) Accommodation facilities: Plenty of hotels offering full or half board. MTDC Tourist Camp provides dorm – beds at affordable rates. The ‘camp’ is near the Dasturi car park. You can eat at one of the many thali joints along MG Road.
(3) Best Time of the year to visit: All the year round except the rainy season.
(4) What to see: Viewpoints such as Porcupine, Louisa and Echo have the finest views. On a clear day, one can see Mumbai lying afar from ‘Hart Point’; perpendicular cliffs plunge into steep ravines; monkeys and squirrels.
(5) Shopping Attractions: Locally made chappals, home – made chocolates and chikkis, caps and other items for campers; walking sticks.
(6) Special features: Greenery, nature at its best, trekking, horse riding; good for a day’s group picnic.

(c) Vocabulary Extension – Choose several words from the text. Use a dictionary or internet to build up more associations/collocations of each word.
Answer:
(1) Associations:

(2) Collocations:

(d) World Heritage Sites – Make a poster about World Heritage Sites, specifying some details and specialties about each of them.

(e) Letter – Write a letter to an expert on the environment. Ask him/her five questions about your concern/doubts about World Heritage sites. Give him/her three ideas on how to protect them.
Answer:
Amit Awte
102, Riddhi Vihar
R.N. Road
Aurangabad – 431 001,
12th November, 2020

To
Mr. Avinash Ranade
‘Nisarg’
Shastri Marg
Aurangabad – 431 002.
Sub: Protection of World Heritage Sites

Sir
It was with great interest that I read in our local newspaper about your interest in the protection of World Heritage Sites. I would like to ask you a few questions which have haunted me for some time.

They are:
(1) Does India have enough experts to restore the damage done to our sites by nature/visitors etc.?
(2) Is there enough security to protect the sites from vandalism?
(3) Can there be a restriction on the number of visitors to the sites?
(4) Are the funds allocated to the preservation of the sites by the World Heritage Committee sufficient?
(5) Is there enough information about the sites on tourist websites/ Internet?

I would like to give some suggestions. Can we not impose a limit on the number of tourists visiting these places? We can also have sessions on how to maintain cleanliness and prevent vandalism. Stiff fines must be imposed on all those who break the rules.

I hope to receive a reply from you, as I am also very concerned about the preservation of our heritage sites.

Yours faithfully,
Amit Awte

(f) Article – Write an article for a magazine about the World Heritage sites at risk. Include imaginary interviews with people who are trying to save them. Read your article in front of your class.

Question 16.
The project of dismantling and moving the temples in the valley to higher ground cost $80 million.
(i) $40 million
(ii) $50 million
(iii) $80 million.
Answer:
(iii) $80 million.

Question 17.
Complete the following: (The answers are given directly and underlined.)
(1) A World Heritage Site should have significant …………………
(2) World Heritage Sites include ……………………..
(3) They can also be a ……………………..
(4) The convention concerning the protection of  Cultural Natural Herttage was adopted by ……………………
Answer:
(1) cultural or natural importance to humanity.
(2) combination of cultural and natural areas.
(3) forests, lakes, monuments, buildings and cities.
(4) UNESCO’s General Conference on November 16, 1972.

Question 18.
(a) UNESCO launched an international campaign in 1959.
Answer:
In 1954, Egypt started plans to build the Aswan High Dam. The initial plans for the dam’s construction would have flooded the valley containing the Abu Simbel Temples and scores of ancient Egyptian artifacts. To protect the temples and artifacts, UNESCO launched an international campaign in 1959, that called for the dismantling and movement of the temples to higher ground.

(b) A White House Conference in the United States called for a ‘World Heritage Trust’.
Answer:
A White House Conference in the United States called for a World Heritage Trust’ to protect the world’s historic and cultural sites as well as the significant natural and scenic sites.

(c) convention:
(i) typical
(ii) agreement
(iii) old – fashioned
(iv) persuade
Answer:
(d) agreement

Question 19.
Pick out 4 adjectives from the passage ending with the suffix ‘ – al’.
Answer:
1. educational,
2. cultural,
3. natural,
4. historical.

Question 20.
The World Heritage Committee meets once a year.
(i) once a year
(ii) twice a year
(iii) three times a year
Answer:
(i) once a year

Question 21.
A nominated site has to be first included in a Tentative List.
(i) World Heritage List
(ii) Nomination File
(iii) Tentative List
Answer:
(iii) Tentative List

Question 22.
Explain what the World Heritage Committee is responsible for.
Answer:
The World Heritage Committee is the main group responsible for establishing which sites will be listed as UNESCO World Heritage Sites.

Question 23.
Who makes recommendations to the World Heritage Committee?
Answer:
The recommendations to the World Heritage Committee are made by two Advisory Bodies, the International Council on Monuments and Sites and the World Conservation Union.

Question 24.
(1) Choose the correct noun forms from those given in the brackets:
(1) inscribed (inscription/inscribtion)
(2) responsible (responsive/responsibility)
(3) nominated (nominative/nomination)
(4) included (inclusion/inclution)
Answer:
(1) inscription
(2) responsibility
(3) nomination
(4) inclusion.

Question 25.
Complete the following by choosing the correct nouns from the box:
Bodies Parties List File
(1) Tentative ……………….
(2) Nomination ……………….
(3) Advisory ……………….
(4) State ……………….
Answer:
(1) Tentative List
(2) Nomination File
(3) Advisory Bodies
(4) State Parties.

Question 26.
World Heritage Committee can delete/exclude a site from the World Heritage List
(a) World Heritage Committee
(b) World Peace Committee
(c) World Health Committee
Answer:
(a) World Heritage Committee

Question 27.
There are 890 World Heritage Sites around the World.
(a) 689
(b) 890
(c) 36
Answer:
(b) 890

Question 28.
36 – sites have been included from India.
(a) 176
(b) 44
(c) 36
Answer:
(c) 36

Question 29.
Match the places with the countries:

‘A’	‘B’
(1) Sydney Opera House	(a) Vienna
(2) Historic Center	(b) Peru
(3) Grand Canyon National Park	(c) Australia
(4) Machu Pichhu	(d) United States

Answer:

‘A’	‘B’
(1) Sydney Opera House	(c) Australia
(2) Historic Center	(a) Vienna
(3) Grand Canyon National Park	(d) United States
(4) Machu Pichhu	(b) Peru

Question 30.
Complete the following:
(1) Peru’s Machu Picchu is an example of a ………………….
(2) The World Heritage Committee can choose to delete a site from the list if ……………….
Answer:
(1) mixed site, both cultural as well as natural.
(2) the site loses the characteristics which allowed for it to originally be included on the World Heritage List.

Question 31.
Explain the role of the World Heritage Committee.
Answer:
The World Heritage Committee allocates resources from the World Heritage Fund to a World Heritage Site which is in danger due to any reason or in need of protection or restoration. If a site loses the characteristics which allowed for it to originally be included on the World Heritage List, the World Heritage Committee can choose to delete the site from the list.

Question 32.
Choose the correct meanings:
(a) allocate:
(i) allow
(ii) distribute
(iii) catch
(iv) understand
Answer:
(b) distribute

Question 33.
Fill in the blanks with the correct words from the passage: (The answers are given directly and underlined.)
(a) Many small towns of the previous century have become crowded cities now due to rapid ………………..
(b) We should be well – prepared for …………….. problems like global warming.
Answer:
(a) urbanization.
(b) environmental

Question 34.
(1) Pick out a gerund from the lesson and use – it in your own sentence.
(2) Find out five hidden words from the given word: international
(3) Use the following phrase in your own sentence: a corhbination of
(4) Spot the error/errors and rewrite the correct sentence: The State Parties is then responsible for identifying and nominating new sites.
(5) Identify the type of sentence: Get out of my way.
(6) Punctuate: if however a site loses the characteristics which allowed for it to be originally included on the world heritage list the world heritage committee can choose to delete the site from the list.
(7) From the following verbs, pick out the verb which forms its present and past participle by doubling the last letter. run, lose, trip, quit
(8) Arrange the following words in alphabetical order: Sydney, Vienna, Austria, Peru, Australia, Egypt, China
Answer:
(1) protecting: We should think of various ways of protecting our environment.
(2) internatIonal : natIonal, nation, train, trail, trial.
(3) The rainbow is a combination of seven colours.
(4) The State Parties are then responsible for identifying and nominating new sites.
(5) Imperative sentence.
(6) If however, a site loses the characteristics which allowed for it to be originally included on the World Heritage List, the World Heritage Committee can choose to delete the site from the list.
(7) trip : tripped, trIpping.
(8) Australia, Austria, China, Egypt, Peru, Sydney, Vienna

Question 35.
(1) Use the following word and its homophone in two separate sentences : rain
(2) UNESCO launched an International campaign In 1959. (Rewrite beginning ‘An lnternattonal…..)
(3) DIfferent plans are put Into place. (Rewrite using the future perfect tense of the verb.)
Answer:
(1) (i) There was light rain yesterday evening near my house.
(ii) In the past, a cõuntry progressed dutlng the reign of good kings.
(2) An international campaign was launched by UNESCO in 1959.
(3) Different plans will have been put into place.

Question 36.
(1) Italy has the highest number of World Heritage Sites. (Rewrite using the comparative form.)
(2) The World Heritage Committee meets once a year to review these recommendations. (Rewrite as a compound sentence.)
Answer:
(1) Italy has a higher number of World Heritage Sites than any other country.
(2) The World Heritage Committee meets once a year and (it) reviews these recommendations.

Balbharti Maharashtra State Board Class 10 English Solutions Unit 1.4 All the World’s a Stage Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 10 English Solutions Unit 1.4 All the World’s a Stage

Maharashtra State Board Class 10 English Solutions Unit 1.4 Warming Up Questions and Answers

Question 1.
Pair work

• Talk to your friend about all the things related to ‘Seven.’
  For example Seven wonders of the world.
• Pair up with your partner and name those given below all of the under :

(a) The seven wonders of the world
………………………………………………………
(b) The seven continents
………………………………………………………
(c) The seven colours of the rainbow
………………………………………………………
(d) The seven notes of the music
………………………………………………………
(e) The seven seas of the world
………………………………………………………
Answer:
(a) The Seven wonders of the world : The Great Wall of China, Christ the Redeemer Statue, Machu Picchu, Chichen Itza, The Roman Colosseum, The Taj Mahal and Petra.
(b) The Seven continents : Asia, Europe, Australia, Africa, North America, South America, Antarctica.
(c) The Seven colours of the rainbow : violet, indigo, blue, green, yellow, orange, red
(d) The Seven notes of the musical scale : sa-re-ga-ma-pa-da-ni./doh-re-me-fa-so-la-ti
(e) The Seven seas of the world : Arctic Ocean, Antarctic Ocean, North Atlantic Ocean, South Atlantic Ocean, Indian Ocean, North Pacific Ocean, South Pacific Ocean.

Question 2.
Life is often compared to many things. Write down 7 things that life can be compared to and justify the comparison. For example,
(a) Life is a keyboard, because if you press the right keys you have typed a good destiny.
(b) ………………………………………………………
(c) ………………………………………………………
(d) ………………………………………………………
(e) ………………………………………………………
(f) ………………………………………………………
(g) ………………………………………………………
Answer:
(a) Life is a keyboard; if you press the right keys, you have typed out a good destiny.
(b) Life is a river-always flowing.
(c) Life is like a seed; it will never grow unless planted, nourished and nurtured.
(d) Life is like an elevator, with lots of ups and downs. ‘
(e) Life is like an onion. You peel off layer after layer. Sometimes it makes you weep.
(f) Life is like a jigsaw puzzle. You have all the pieces, but you have to put them together correctly.
(g) Life is like a jack-in-the-box. You never know : when you are going to get a box on your chin.

Question 3.
Match the approximate ages with the stages.

No.	Age-group			Stages
1	Birth to 2 years		a	teenage/adolescence
2	3 years to 12 years		b	old age/second childhood
3	13 years to 17 years		c	middle-age
4	18 years to about 44 years		d	babyhood/infancy
5	About 45 years to 60 years		e	senior citizen/elderly person
6	65 years up to 75 to 80 years		f	adulthood
7	Above 80 years		g	childhood

Answer:

No.	Age-group	Stages
(1)	Birth to 2 years	(d) babyhood/infancy
(2)	3 years to 12 years	(g) childhood
(3)	13 years to 17 years	(a) teenage/adolescence
(4)	18 years to about 44 years	(f) adulthood
(5)	About 45 years to 60 years	(c) middle-age
(6)	65 years up to 75 to 80 years	(e) senior citizen/ elderly person
(7)	Above 80 years	(b) old age/second childhood

Maharashtra Board Class 10 English Kumarbharati Unit 1.4 Questions and Answers

Question 1.
Read the words in given clouds. Match them with what they signify.

Answer:
(1) Stage – Life
(2) Characters – Roles played by human beings
(3) Script – Story of life
(4) Dialogues – Conversation
(5) Entry – Birth
(6) Exit – Death

Question 2.
Read the poem carefully and complete the following table.

Ages of Man	Role	Qualities/Actions
1		1. 2.
2		1. 2.
3		1. 2.
4		1. 2.
5		1. 2.
6		1. 2.
7		1. 2.

Answer:

First	infant	(1)   frightened (2)   crying, puking
Second	schoolboy	(1)   unhappy (2)   whining, creeping unwillingly to school
Third	lover	(1)   woeful (2)   sighing, singing sad ballads
Fourth	soldier	(1)  jealous in honor, ambitious (2)   quarreling, facing danger

Question 3.
Write down in your own words the differences between the following stages of a man’s life.
2nd stage and 4th stage …………………………………
……………………………………………………………………
……………………………………………………………………

3rd stage and 5th stage …………………………………
……………………………………………………………………
……………………………………………………………………

1 st stage and 7th (last) stage …………………………………
……………………………………………………………………
……………………………………………………………………
Answer:
2nd stage and 4th stage:
The second stage is that of a school boy, complaining and crying. He goes to school early in the morning, with a well-scrubbed, shining face. He carries his school bag and creeps slowly, like a snail, unwillingly to school.

‘Full of strange oaths and bearded like the pard, Jealous in honour, sudden and quick in quarrel.’

3rd stage and 5th stage:
The third stage is that of a lover, who is’ breathless and sighing with passion. He sings sad Songs dedicated to the beauty of his lover.

The fifth stage is that of , a mature middle-aged man with a round belly. He is stern and formal and full of wisdom. He is full of wise sayings and gives modern examples.

1 st stage and 7th (last) stage:
The first stage is that of an infant, crying weakly and throwing up in his nurse’s arms. He is unaware of what is happening around him.The baby, at this stage, is without teeth, without vision, without taste and without anything.

The last stage of all, which ends one’s eventful life, is when man becomes senile and enters his second childhood. He is again unaware of what is happening around him. This final stage is when he is once more without teeth, without vision, without taste and without anything.

Question 4.
Pick out lines that contain Imagery (a picture created in the mind by using words) of the following people.
(a) School boy …………………………………
(2nd stage) …………………………………
(b) Soldier …………………………………
(4th stage) …………………………………
(c) Judge …………………………………
(5th stage) …………………………………
(d) Senior citizen …………………………………
(6th stage) …………………………………
Answer:
(a) a snail
‘The whining schoolboy, with his satchel and shining morning face, creeping like a snail unwillingly to school.’

(b) acts like the pard
‘Full of strange oaths and bearded like the pard, Jealous in honour, sudden and quick in quarrel.’

(c) In fair round belly with good capon lined
With eyes “severe and beard of formal cut

(d) His youthful hose, well-saved, a world too wide
For his shrunk shank

Question 5.
You will notice that there is no Rhyme-scheme in the poem. It appears similar to the poem 1.1 ‘Where the Mind is Without Fear by Tagore.

However Tagore’s poem has no steady rhythm/meter either it is called Free Verse. Shakespeare uses lines with a steady rhythm of 5 beats in each. It is termed as Blank Verse. (No rhyme-scheme but uniformity in rhythm) Copy the lines from “Ánd all the men and women merely players” to “sudden and quick in quarrel”. Put a stress mark on each of the syllables stressed in the lines as for example, And all the men and women merely players;
Answer:
The poem is written in free verse without any rhyme scheme or consistent metre. There are many figures of speech e.g. Repetition. Metaphor, Alliteration, etc. An Important figure of speech is Personification. ‘Where tireless striving stretches its arms towards perfection’. Here, we can actually visualize ‘tireless striv1ng stretching Its arms to reach its goal.

The poem is a prayer to God. Tagore addresses God as ‘my Father’ and asks Him to awaken his country Into a heaven of freedom, where there is total freedom of good thoughts, good words and good actions. He wishes for a country where people would be free from fear, where knowledge would be free to all individuals and people from all castes and religions would be united.

Question 6.
Think and write on your own.
(a) What is the theme/central idea of this poem?
(b) Which two stages of man, described by Shakespeare sound humorous? Say why.
(c) The last (7th) stage of life sounds very sad and miserable. How can you make old age also cheerful and happy?
Answer:
(a) The theme of this poem is the cycle of life.
It tells us how one starts out an infant, helpless and unaware of the surroundings, and ends the same way, i without being aware of what is happening around one.

(b) The second and third stages are humorous. One can just imagine the school boy, complaining and whining, creeping to school slowly with a well-scrubbed and shining face. The third stage, where the lover sighs loudly and sings sad poems and songs, is also humorous.

(c) We can make the last stage joyful by preparing for it beforehand. We know that most of us will reach this stage before our final exit. Hence, we must maintain good health, and keep good relations with our family and the people around us. We must save enough money to get us through this stage without any stress on ourselves or others.

Question 7.
(A) The poem is entirely metaphorical. Pick out the comparisons from the poem.
(a) world …………………………………
(b) actors …………………………………
(c) birth and death …………………………………
(d) school boy …………………………………
(e) the lover’s sigh …………………………………
(f) spotted leopard …………………………………
(g) last stage (old age) …………………………………
Answer:
(a) stage
(b) –
(c) entrances and exits
(d) a snail
(e) a furnace
(f) bearded soldier

(B) Pick out from the poem two examples of each.
(a) Simile
(1) …………………………………
(2) …………………………………
Answer:
Simile. Two dissimilar objects are compared using the word ‘like’.

(b) Onomatopoeia
(1) …………………………………
(2) …………………………………

(c) Alliteration
(1) …………………………………
(2) …………………………………

(d) Metaphor
(1) …………………………………
(2) …………………………………

(e) Inversion
(1) …………………………………
(2) …………………………………

(f) Transferred Epithet
(1) …………………………………
(2) …………………………………
Answer:

(a) Simile	(1)   Creeping like a snail (2)   Soldier bearded like the pard
(b) Onomatopoeia	(1)   And then the whining schoolboy (2)   Sighing like a furnace
(c) Alliteration	(1) They have -their exits and their entrances (2) His youthful hose, well- saved, a world too wide
(d) Metaphor	(1)   They have their exits and their entrances (2)   men and women merely players
(e) Inversion	(1)   His acts being seven ages. (2)   With eyes severe and beard of formal cut
(f) Transferred Epithet	(1)   with a woeful ballad (2)   Into the lean and slippered pantaloon

Question 8.
Read the summary of the play ‘As You Like It’ by William Shakespeare using the Internet. Find out which character has narrated the above poem and on what occasion. Also, make a list of all the characters of the play.
Answer:
The character who has narrated the above poem in the play ‘As You Like It’ by William Shakespeare is Jacques. He narrates it in Act II, Scene VII.

Some of the other characters in the play are Celia, Rosalind, Orlando, Oliver, Duke Senior, Duke Frederick, Touchstone, etc.

Question 9.
Read the poem again and write an appreciation of the poem in a paragraph format. (Refer to page no. 5)
Answer:
Point Format
(for understanding)
The title of the poem : All the World’s a Stage’
The poet : WIlliam Shakespeare
Rhyme scheme : blank verse I.e. no rhyme scheme, but there is a steady rhythm of five beats In each line.
Figures of speech : Metaphor, Simile, Alliteration, Repetition. etc.
Theme/Central idea : The theme of the poem Is the cycle of life.

Paragraph Format
The poem ‘All the World’s a Stage’ is by William Shakespeare. It is taken from Shakespeare’s play ‘As you like It’. It is a monologue by one of the characters in the play.

The poem is written in blank verse i.e. there is no rhyme scheme, but there Is a steady rhythm of five beats i.e. iambic pentameter in each line. There are many figures of speech, like Simile. Alliteration and Repetition. but the one that stands out Is Metaphor. In the lines ‘All the world’s a stage, And all men and women are merely players’, there is an implied comparison between two different things.

In this poem, Shakespeare compares life to a stage. He has divided life Into seven stages. each having its own varied qualities and features. The theme of the poem is the cycle of life. It tells us how one starts out as an Infant, helpless. without understanding. and ends the same way, without being aware of what Is happening around one.

Question 10.
Complete the following diagram:
Answer:

Question 11.
Match the following :

A	B
(1) Infant	(a) acts like the pard
(2) School boy	(b) mewling and puking
(3) Lover	(c) whining,
(4) Soldier ‘	(d) sighing like furnace

Answer:

(1) Infant	(b) mewling arjd puking
(2) School boy	(c) whining
(3) Lover	(d) sighing like furnace
(4) Soldier	(a) acts like the pard

Question 12.
Complete the following : (The answers are given directly and underlined.)
Answer:
(1) ‘Exits’ and ‘entrances’ refer to deaths and births.
(2) Reputation is like a bubble because one does useless things for one’s reputation, which can burst like a bubble in one instant.

Question 13.
Name and explain the poetic devices used in the following lines:
(a) Soldier bearded like the pard
Answer:
Simile. Two dissimilar objects are compared using the word ‘like’,

(b) Sighing like a furnace
Answer:
Simile. Two dissimilar objects are compared using the word ‘like’.

(c) men and women merely players
Answer:
Metaphor. Implicit comparison between two different things.

(d) They have their exits and their entrances
Answer:
Alliteration. Repetition of the sound of ‘t’ and ‘e’.
Metaphor. Implicit comparison between two different things.

(f) With a woeful ballad
Answer:
Alliteration. Repetition of the sound of ‘w’.
Transferred Epithet. It is not the ballad that is woeful but the lover.

Question 14.
Complete the following diagram :
Answer:

Question 15.
Write if the following statements are True or False :
Answer:

• Man in the fifth stage of life is full of wisdom. (True)
• Man in the sixth stage has a fair, round belly. (False)
• The last few lines are full of melancholy. (True)
• In the last stage, man is unaware of his surroundings. (True)

Question 16.
Write down in your own words the differences between the following stages of a man’s life :
(a) 5th and 6th stage :
Answer:
The fifth stage is that of a mature middle-aged man with a round belly. He is stern and formal and full of wisdom. He is full of wise sayings and gives modern examples.

In the sixth stage, man has become old, with thin legs in slippers and loose pants. He has spectacles on his nose and a pouch by his side. The close-fitting stockings, which he had saved from his younger days, are now too big for his thin legs, which have shrunk with age. His loud voice, which was once manly, has now become childish and shrill. There are whistling sounds when he talks.

Question 17.
Complete the following table based on the extract. (The answers are given directly.)
Answer:

Stages of Man	Role	qualities/Actions
Fifth	adult man	(1)   fat, serious and wise (2)   giving advice
Sixth	middle-aged man	(1)   thin and shrunken (2)   talking in a shrill-voice
Seventh	very old man	(1)   senile, child-like (2)   oblivious to his surroundings

Question 18.
The poem is entirely metaphorical. Pick out the comparison from the extract: last stage (old age)
Answer:
last scene

Question 19.
Name and explain the figures of speech used in the following lines :
(a) His youthful hose, well-saved, a world too wide
Answer:
Alliteration. Repetition of the sound of ‘w’.

(b) For his shrunk shank
Answer:
Alliteration. Repetition of the sound of ‘s’.

(c) Turning again towards childish treble
Answer:
Alliteration. Repetition of the sound of ‘t’.

(d) Sans teeth, sans eyes, sans taste, sans everything.
Answer:
Repetition. The word ‘sans’ is repeated for emphasis.

Balbharti Maharashtra State Board Class 10 Science Solutions Part 1 Chapter 3 Chemical Reactions and Equations Notes, Textbook Exercise Important Questions and Answers.

Maharashtra State Board Class 10 Science Solutions Part 1 Chapter 3 Chemical Reactions and Equations

Question 1.
Choose the correct option from the bracket and explain the statement giving reasons :
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double diplacement, decomposition)

a. To prevent rusting, a laver of ……… metal is applied on iron sheets.
Answer:
To prevent rusting, a layer of zinc metal is applied on iron sheets.
The rusting of iron is an oxidation process. Due to corrosion of an iron a deposit of reddish substance (Fe₂O₃.H₂O) is formed on it. This substance is called rust. To prevent corrosion, a layer of zinc metal (galvanisation) is applied on iron sheets.

b. The conversion or ferrous sulphate to ferric sulphate is …….. reaction.
Answer:
The conversion of ferrous sulphate to ferric sulphate is an oxidation reaction.
When ferric ion is formed. from ferrous ion, the positive charge is increased by one unit. while this happens the rerrous ion loses one electron. A process in which a metal or its ion loses one or more electrons is called an oxidation.
2FeSO₄ → Fe₂(SO₄)₃
Fe₂ + SO₄^2- → 2Fe³⁺ + SO₄^2-

c. When electric current is passed through acidulated water …….. of water takes place.
Answer:
when electric current is passed through acidulated water decomposition of water takes place. In this reaction. hydrogen and oxygen gas are formed.

This decomposition takes place with the help of an electric current, it is also called electrolytic decomposition.

d. Addition of an aqueous solution of ZnSO₄ to an aqueous solution of BaCl₂ is an example of ……… reaction.
Answer:
Addition of an aqueous solution of ZnSO₄ to an aqueous solution or BaCl₂ is an example or double displacement reaction.

Barium chloride reacts with zinc sulphate to form a white precipitate of barium sulphate. white precipitate is formed by exchange of ions Ba⁺⁺ and SO₄^— between the reactants.

Question 2.
a. What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.
Answer:
The reaction which involves simultaneous oxidation and reduction is called an oxidation-reduction or redox reaction.
In a redox reaction, one reactant gets oxidised while the other gets reduced during a reaction.
Redox reaction = Reduction + Oxidation

In redox reaction, the reductant is oxidized by the oxidant and the oxidant is reduced by the
reductant.
Example:CuO_(s) + H_2(g) → Cu_(s) + H₂O
In this reaction, oxygen is removed from copper oxide therefore it is a reduction of CuO, while hydrogen accepts oxygen to form water that means oxidation of hydrogen takes place. Thus oxidation and reduction reactions occur simultaneously.

Other examples of redox reactions:

b. How can the rate of the chemical reaction, namely, decomposition of hydrogen peroxide be increased?
Answer:
At room temperature, the decomposition of hydrogen peroxide into water and oxygen takes place slowly. However, the same reaction occurs at a faster rate on adding manganese dioxide (MnO₂),
powder in it.

c. Explain the term reactant product giving examples.
Answer:

1. The substance which undergoes bond breaking while taking part in a chemical reaction is called reactant.
2. The substance formed as a result of a chemical reaction by formation of new bonds is called product.
3. Example: In a chemical reaction, the formation of carbon dioxide gas takes place by combustion of coal in air. In this reaction, coal (carbon) and oxygen (from air) are the reactants while carbon dioxide is the product.

d. Explain the types of reactions with reference to oxygen and hydrogen. Illustrate with examples.
Answer:
With reference to oxygen and hydrogen, there are two types of reaction

1. Oxidation reaction
2. Reduction reaction.

1. Oxidation reaction:
Examples:
(1) When carbon burns in air, it forms carbon dioxide. In this reaction carbon accepts oxygen, therefore, this is an oxidation reaction.
C_(s) + O_2(g) → CO_2(g)

(2) When sodium reacts with ethyl alcohol, sodium ethoxide and hydrogen gas is formed. In this reaction, hydrogen is removed from ethyl alcohol, therefore this is an oxidation reaction.

(3) Acidified potassium dichromate (K₂Cr₂O₇ / H₂SO₄) oxidises ethly alcohol to acetic acid.

2. Reduction reaction:
Examples:
(1) When hydrogen gas is passed over black copper oxide a reddish coloured layer of copper is
formed.
In this reaction an oxygen atom removed from CuO to form copper, hence, this is reduction.

(2) when hydrogen gas is passed over red hot coke, methane is obtained.
Here, hydrogen is added to coke (carbon). Hence, this is reduction.

e. Explain the similarity and difference in two events, namely adding NaOH to water and adding CaO to water.
Answer:
Similarity : Both NaOH and CaO, when dissolved separately in water, solid NaOH dissolves releasing heat, resulting in rise in temperature. This reaction is exothermic reaction. When solid CaO dissolves in water, Ca(OH)₂ is formed, large amount of heat is evolved. This reaction is also exothermic reaction. Both reactions are combination reactions and single product is obtained.
NaOH_(s) + H₂O → NaOH_(aq) + Heat
CaO_(s) + H₂O → Ca(OH)_2(aq) + Heat
Difference:

1. Aqueous solution of NaOH is considered as a strong alkali.
2. Aqueous solution of Ca(OH)₂ is considered as a weak alkali.

Question 3.
Explain the following terms with examples.
a. Endothermic reaction
Answer:
Endothermic reaction: The reaction in which heat is absorbed is called an endothermic
reaction.
when KNO_3(s) dissolves in water, there is absorption of heat during the reaction and the temperature of the solution falls.
KNO_2(s) + H₂O_(l) + Heat → KNO_3(aq)

b. Combination reaction
Answer:
When two or more reactants combine in a reaction to form a single product, it is called a combination reaction.
Examples:
1. The ammonia gas reacts with hydrogen chloride gas to form the salt in gaseous state, immediately it condenses at room temperature and gets transformed into the solid state.

2. Magnesium burns in air to form white powder of magnesium oxide as a single product.

3. Iron reacts with sulphur to form iron sulphide.

c. Balanced equation
Answer:
In a chemical reaction, the number of atoms of the elements in the reactants is same as the number or atoms of those elements in the product, such an equation is called a balanced equation.
Example: AgNO₃ + NaCl → AgCl + NaNO₃
In the above reaction, the number of atoms of the elements in the reactants is same as the number of atoms of elements in the products.

d. Displacement reaction
Answer:
The reaction in which the place of the ion of a less reactive element in a compound is taken by another more reactive element by the formation of its own ions is called displacement reaction.

When zinc granules are added to the blue coloured copper sulphate solution, the zinc ions formed from zinc atoms take the place of Cu²⁺ ions in CuSO₄, and copper atoms, formed from Cu²⁺ ions comes out i.e. the more reactive zinc displaces the less reactive Cu from copper sulphate.

4. Give scientific reason:
a. When the gas formed on heating lime stone is passed through freshly prepared lime water, the lime water turns milky.
Answer:
when lime stone is heated, calcium oxide and carbon dioxide are formed. This carbon dioxide gas is passed through freshly prepared lime water, insoluble calcium carbonate and water are formed. In this reaction, lime water turns milky.

b. It takes time for pieces of Shahabud tile to disappear in HCl, but its powder disappears rapidly.
Answer:
The rate of a reaction depends upon the size of the particles of the reactants taking part in the reaction. The smaller the size of the reactants particles, the more is their total surface area and the faster is the rate of reaction.

In the reaction of dil. HCl with pieces of Shahabad tile, CO₂ effervescence is formed amid the tile disappears slowly. On the other hand. CO₂ effervescence forms at faster rate with Shahabad tile powder and it disappears rapidly.

c. While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Answer:
(1) The preparation of dilute sulphuric acid falls in the category of extreme exothermic process.

(2) During the preparation of dilute sulphuric acid. large amount of water is taken in a glass container which is surrounded by ice. Cool it for twenty minutes, Now small quantity of conc. H₂SO₄ is added slowly with stirring. Therefore, only a small amount of heat is liberated at a time. In this way dilute sulphuric acid is prepared.

(3) On the other hand, in the process of dilution or conc. sulphuric acid with water, very large amount of heat is liberated. As a result, water gets evaported instantaneously, if it is poured in to conc. H₂SO₄ which may cause an accident.

d. It is recommended to use air tight container for storing oil for long time.
Answer:

1. If edible oil is allowed to stand for a long time, it undergoes air oxidation, it becomes rancid and its smell and taste changes.
2. Rancidity in the rood stuff cooked in oil or ghee is prevented by using antioxidants. The process of oxidation reaction of food stuff can also be slowed down by storing it in air tight container.

Question 5.
Observe the following picture a write down the chemical reaction with explanation.

Answer:
The rusting of iron is an oxidation process. The rust on iron does not form by a simple reaction between oxygen and iron surface. The rust is formed by an electrochemical reaction. Fe oxidises to Fe₂O₃. H₂O on one part of iron surface while oxygen gets reduced to H₂O on another part or surface, Different regions on the surface of iron become anode and cathode.
(1) Fe is oxidised to Fe²⁺ in the anode region.
Fe_(s) → Fe²⁺ _(aq) + 2e^–
(2) O₂ is reduced to form water in the cathode region.
O_2(g) + 4H⁺ _(aq) + 4e— → 2H₂O_(l)

When Fe²⁺ ions migrate from the anode region they react with water and futher get oxidised to form Fe³⁺ ions.
A reddish coloured hydrated oxide is formed from Fe³⁺ ions. It is called rust. It collects on the
surface.
2Fe³⁺ _(aq) + 4H₂O_(l) → Fe₂O₃. H₂O_(s) + 6H⁺ _(aq)…
Because of various components in the atmosphere, oxidation of metals takes place, consequently resulting in their damage. This is called ‘corrosion’. Iron rusts and a reddish coloured layer is formed on it. This is corrosion of iron.

Question 6.
Identify from the following reactions the reactants that undergo oxidation and reduction.
a. Fe + S → FeS
Answer:
Fe + S → FeS
In this reaction, Iron (Fe) undergoes oxidation
and sulphur. (S) undergoes reduction.

b. 2Ag₂O → 4Ag + O₂↑
Answer:
2Ag₂O → 4Ag + O₂↑
In this reaction, reduction of Ag₂O takes place.

c. 2Mg + O₂ → 2MgO
Answer:
2Mg + O₂ → 2MgO
In this reaction, oxidation of Mg takes place.

d. NiO + H₂ → Ni + H₂O
Answer:
NiO + H₂ → Ni + H₂O
In this reaction, reduction of NiO takes place and oxidation of H₂ takes place.

Question 7.
Balance the following equation stepwise.
a. H₂S₂O_7(l) + H₂O_(l) → H₂SO_4(l)
Answer:
Step 1: Rewrite the given equation as it is
H₂S₂O7_(l) + H₂O_(l) → H₂SO_4(l)
Step 2: write the number or atoms of each element in the unbalanced equation on both sides of equations.

Element	Number of atoms in reactant (left side)	Number of atoms in products (right side)
H	4	2
S	2	1
O	8	4

Step 3: To equalise the number of hydrogen atoms, sulphur atoms and oxygen atoms we use 2 as the coemficient or factor in the product.

Element	Number of atoms in reactant (left side)	Number of atoms in products (right side)
H	4	2 × 2
S	2	1 × 2
O	8	4 × 2
Total	14	14

Now the equation becomes H₂S₂O₇ + H₂O → 2H₂SO₄
Now, count the atoms of each element on both sides of the equation. The number of atoms on both sides are equal. Hence, the balanced equation is
H₂S₂O₇ + H₂O → 2H₂SO₄
Now indicate the physical states of the reactants and products.
H₂S₂O_7(l) + H₂O_(l) → 2H₂SO_4(l)

b. SO_2(g) + H₂S_(aq) → S_(s) + H₂O_(l)
Answer:
Step 1:
Rewrite the given equation as it is
SO_2(g) + H₂S_(aq) → S_(s) + H₂O_(l)

Step 2:
Write the number of atoms of each element in the unbalanced equation on both sides of equations.

Element	Number of atoms in reactants (left side)	Number of atoms in products (right side)
S	2	1
O	2	1
H	2	2

The number of hydrogen atoms on both sides of the equation is same, therefore, equalise the number of sulphur atoms and oxygen atoms.

Step 3: To balance the number of sulphur atoms:

Number of atoms of sulphur	In reactants		In products
	S2O	H2S	(S)
Initially	1	1	1
To balance	1	1	1 × 2

To equalise the number of sulphur atoms, we use 2 as the factor in the product, now the equation becomes
SO₂ + H₂S → 2S + H₂O

Step 4:
To equalise the number of oxygen atoms in the unbalanced equation.

Number of atoms of oxygen	In reactants (SO2)	In products H2O
Initially	2	1
To balance	2	1 × 2

To equalise the number of sulphur atoms, we use 2 as the factor in the product i.e. H₂O, now the unbalanced equation becomes
SO₂ + H₂S → 2S + 2H₂O

Step 5:
To equalise the number of hydrogen atoms in unbalanced equation:

Number of atoms of hydrogen	In reactants (H2S)	In products (H2O)
Initially	2	4
To balance	2 × 2	4

To equalise the number of hydrogen atoms we use 2 as the factor in the reactant i.e, H₂S, now the unbalanced equation become
SO₂ + 2H₂S → 2S + 2H₂O
Now, count the atoms of each element on both sides of the equation, there are less number of sulphur atoms in the product. Now equalise the sulphur atoms, the balanced equation becomes,
SO₂ + 2H₂S → 3S + 2H₂O
Now indicate the physical states of reactants and products.
SO_2(g) + 2H₂S_(aq) → 3S_(s) + 2H₂O_(l)

c. Ag_(s) + HCl_(l) → AgCl ↓ + H₂ ↑
Answer:
Step 1:
Rewrite the given equation as it is
Ag_(s) + HCl_(l) → AgCl ↓ + H₂ ↑

Step 2:
write the number of atoms or each element in the unbalanced equation on both sides of equations.

Element	Number of atoms in reactants (left side)	Number of atoms in products (right side)
Ag	1	1
H	1	2
Cl	1	1

The number of silver and chlorine atoms on both sides of the equation are same, therefore, equalise the number of hydrogen atoms.

Step 3:
To balance the number of hydrogen atoms.

Number of atoms of hydrogen	In reactants HCl	In products H2
Initially	1	2
To balance	1 × 2	2

To equalise the number of hydrogen atoms, we use 2 as the factor in the product HCl, now the unbalanced equation become
Ag_(s) + 2HCl → AgCl + H₂

Step 4:
To balance the number of chlorine atoms:

Number of atoms of chlorine	In reactants (2HCl)	In products (AgCl)
Initially	2	1
To balance	2	2 ×1

To equalise the number of chlorine atoms, we use 2 as the factor in the product AgCl. now the unbalanced equation becomes
Ag + 2HCl → 2AgCl + H₂
Now count the atoms of each element on both sides of the equation, there are less number of silver atoms in the reactant. Now equalise the silver atoms, the balanced equation becomes
2Ag + 2HCl → 2AgCl + H₂
Now indicate the physical states of the reactunts and products
2Ag_(s) + 2HCl_(l) → 2AgCl ↓ + H₂ ↑

d. H₂SO_4(aq) + NaOH_(aq) → Na₂SO_4(aq) + H₂O_(l)
Answer:
Step 1:
Rewrite the given equation as it is
H₂SO_4(aq) + NaOH_(aq) → Na₂SO_4(aq) + H₂O_(l)

Step 2:
write the number of atoms of each element in the unbalanced equation on both sides of the equation.

Element	Number of atoms in reactants	Number of atoms in products
Na	1	2
S	1	1
O	5	5
H	3	2

The number of oxygen atoms involved in different compounds on both sides (reactants and products) are equal. Therefore, balance the number of atoms of the second element, sodium.

Step 3:
To balance the number of sodium atoms:

Number of atoms of sodium	In reactants	In products
To begin with	1 (in NaOH)	2 (in Na2SO4)
To balance	1 × 2	2

To equalise the number of sodium atoms, we use 2 as the factor of NaOH in the reactants. Now, the partly balanced equation becomes as follows
H₂SO₄ + 2NaOH → Na₂SO₄ + H₂O

Step 4:
Now, balance the number of hydrogen atoms:

Number of atoms of hydrogen	In reactants	In products
To begin with	(in H2SO4) 2 (in NaOH)	2 (in H2O)
To balance	4	2 × 2

To equalise the number of hydrogen atoms, we use 2 as the factor or H₂O in the products. The equation then becomes
H₂SO₄ + 2NaOH → Na₂SO₄ + H₂O
Now, count the atoms of each element on both sides of the equation. The number of atoms on both sides are equal. Hence, the balanced equation is
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
Now indicate the physical states of the reactants and the products.
H₂SO_4(aq) + 2NaOH_(aq) → Na₂SO_4(aq) + 2H₂O_(l)

Question 8.
Identify the endothermic and exothermic reaction.
a. HCl + NaOH → NaCl + H₂O + heat
Answer:
Exothermic reaction.

b. \(2 \mathrm{KClO}_{3}(\mathrm{s}) \stackrel{\Delta}{\longrightarrow} 2 \mathrm{KCl}(\mathrm{s})+3 \mathrm{O}_{2} \uparrow\)
Answer:
Exothermic reaction.

c. CaO + H₂O → Ca(OH)₂ + heat
Answer:
Exothermic reaction.

d. \(\mathrm{CaCO}_{3}(\mathrm{s}) \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}(\mathrm{s})+\mathrm{CO}_{2} \uparrow\)
Answer:
Exothermic reaction.

Question 9.
Match the column in the following table:

Reactants	products	Type of chemical reaction
BaCl2(aq) + ZnSO4(aq)	H2CO3(aq)	Displacement
2 AgCl(s)	FeSO4(aq) + Cu(s)	Combination
CuSO4(aq) + Fe(s)	BaSO4↓ + ZnCl2(aq)	Decomposition
H2O(l) + CO2(g)	2Ag(s) + Cl2(g)	Double displacement

Answer:

Reactants	products	Type of chemical reaction
BaCl2(aq) + ZnSO4(aq)	BaSO4↓ + ZnCl2(aq)	Double displacement
2 AgCl(s)	2Ag(s) + Cl2(g)	Decomposition
CuSO4(aq) + Fe(s)	FeSO4(aq) + Cu(s)	Displacement
H2O(l) + CO2(g)	H2CO3(aq)	Combination

Project:
Do it your self:
1. Prepare aqueous solutions or various solid salts available in the laboratory. Observe what happens when aqueous solution of sodium hydroxide is added to these. Prepare a chart of double displacement reactions based on these observation.

2. Observe and note the physical and chemical changes experienced in various incidents in your day to day 1ife.

Can you recall? (Text Book Page No.16)

Question 1.
what are the types of molecules of elements and compounds?
Answer:
Elements are divided into three classes i.e. metals, nonmetals and metalloids. When two or more elements combine chemically in a fixed proportion by weight, a compound is formed. The properties of a compound are altogether different from those of the constitutional elements.

Question 2.
what is meant by valency of element?
Answer:
The number of electrons that an atom of an element gives away or takes up while forming an ionic bond, is called the valency or that element.

Question 3.
What is the requirement for writing molecular formulae of different compounds?
How are the molecular formulae of the compounds written?
Answer:
while writing the molecular formulae of different compounds, the symbol of the radicals and their valence should be known.
The number of the ions is written as subscript on the right of the symbol or the ion. By cross multiplication of valenceies chemical formula is obtained.

Find out (Text Book Page No. 44)
Question1.
How are the blackened silver utensils and patinated (greenish) brass utensils cleaned?
Answer:
The blackened silver utensils and patinated (greenish) brass utensils are cleaned using baking soda, vinegar and lemon mix.

Use your brain power! (Text Book Page No. 35)

Question 1.
write down the physical states of reactants and products in the reaction
SO₂ + 2H₂S → 3S + 2H₂O
Answer:
Reactants : SO_2(g), 2H₂S_(g)
Products : 3S_(s), 2H₂O_(l).

Question 2.
write down the physical states of reactants and products in the reaction
2Ag + 2HCl → 2AgCl + H₂
Answer:
Reactants: 2Ag_(s), 2HCl_(l)
Products: 2AgCl ↓, H₂ ↑

Question 3.
Identify the reactants and products of the following equation.

Answer:
Reactants: vegetable oil, H₂(g)
Product: Vanaspathi ghee

Use your brain power! (Text Book Page No. 42)

Question 1.
Which is the oxidant used for purification of drinking water?
Answer:
The chlorine based oxidants are used in the purification of drinking water.

Question 2.
Why is potassium permanganate used during cleaning water tanks?
Answer:
Potassium permanganate is an oxidising agent. It oxidises dissolved iron, manganese and hydrogen sulphide into solid particles that are filtered out of the water tank. It is used to control iron bacteria growth in tank.

Can you tell? (Text Book Page No. 43)

Question 1.
what is the type of this reaction, in which Vanaspathi ghee is formed from vegetable oil?
Answer:

In the preparation of vanaspathi ghee from vegetable oil hydrogen gas is used. This process is known as hydrogenation. This is reduction reaction.

Find out (Text Book page No. 33)

What are the other uses of silver nitrate in every day life?
Answer:
Silver nitrate is used in the voters-ink. It is used as reactant in the laboratory. Silver nitrate is used to prevent infection in wounds and skin burns.

Use your brain power! (Text Book Page No. 35)

Question 1.
N_2(g) + H_2(g) ⇌ NH_3(g)
Answer:
Step 1:
Rewrite the given equation as it is
N_2(g) + H_2(g) ⇌ NH_3(g)

Step 2:
Write the number of atoms of each element in the unbalanced equation on both sides of equations

Element	Number of atoms in reactants	Number of atoms in products
N	2	1
H	2	3

Step 3:
In the given equation. NH₃ is a compound and it contains hydrogen element. On the left hand side there are two H atoms and on the right side 3H atoms. Equalise H atoms on both sides.

Hydrogen atoms	In reactants	In products
Initially	2	3
To balance	3 × 2	2 × 3

To equalise the number of hydrogen atoms, we use 3 as the factor in the reactant and 2 as the factor in the products. Now the equation becomes
N₂ + 3H₂ → 2NH₃
Now, count the atoms of each element on both sides of the equation. The number of atoms on both sides are equal. Hence, the balanced equation is
N₂ + 3H₂ → 2NH₃
Now indicate the physical states of the reactants and products
N_2(g) + 3H_2(g) ⇌ 2NH_3(g)

Question 2.
Calcium chloride + Sulphuric acid → Calcium sulphate + Hydrogen chloride.
Answer:
Step 1:
Write the chemical equation from the given word equation.
CaCl₂ + H₂SO₄ → CaSO₄ + HCl

Step 2:
Write the number of atoms of each element in the unbalanced on both sides of equation.

Element	Number of atoms in reactants	Number of atoms in products
Ca	1	1
Cl	2	1
H	2	1
S	1	1
O	4	4

Step 3:
In the given equation H₂SO₄ is a compound and it contains hygrogen element. On the left hand side there are two hydrogen atoms and on the right side one hydrogen atom. Equalise H atoms on both sides.

Hydrogen atoms	In reactants (H2SO4)	In products (HCl)
Initially	2	1
To balance	2	2  × 1

To equalise the number of hydrogen atoms we use 2 as the factor in the product so that the number of H atoms on both sides are equal. Therefore, the equation becomes
CaCl₂ + H₂SO₄ → CaSO₄ + 2 HCl
Now, count the atoms of each element on both sides of the equation. The number of atoms on both sides are equal hence, the balanced equation is
CaCl₂ + H₂SO₄ → CaSO₄ + 2 HCl
Now, indicate the physical state of the reactants and products.
CaCl_2(s) + H₂SO_4(l) → CaSO_4(s) + HCl_(l)

Can you tell? (Text Book Page No. 39)

Take into account the time required for following processes. Classify them into two groups and give titles to the groups.
(1) Cooking gas starts burning on ignition.
(2) Iron article undergoes rusting.
(3) Erosion of rocks takes place to form soil.
(4) Alcohol is formed on mixing yeast in glucose solution under proper condition.
(5) Effervescence is formed on adding baking soda into a test tube containing dilute acid.
(6) A white precipitate is formed on adding dilute sulphuric acid to barium chloride solution.
Answer:
The above processes are classified into two groups (a) slow speed reactions (b) fast speed reactions.
Slow speed reactions: (2), (3) and (4).
Fast speed reactions: (1),(5) and (6).

Use your brain power! (Text Book Page No. 43)

Question 1.
Some more examples of redox reaction are as follows. Identify the reductants and oxidants from them.
(1) 2H₂S + SO₂ → 3S↓ + 2H₂O
(2) MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂↑
Answer:
Oxidants: SO₂, MnO₂
Reductants: H₂S, HCl

Question 2.
If oxidation means losing electrons, what is meant by reduction.
Answer:
Reduction means gaining one or more electrons.

Question 3.
Write the reaction of formation of Fe²⁺ by reduction Fe³⁺ by making use of the symbol (e^–).
Answer:
Fe³⁺ + e^– → Fe²⁺ (reduction)

Think about it (Text Book Page No. 43)

Question 1.
The luster of the surface of the aluminium utensils in the house is lost after a few days. Why does this happen?
Answer:
The aluminium utensils when kept in the house for a few days, oxidation of aluminium takes place, a thin laver aluminium oxide (Al₂O₃) is deposited on the surface. Hence, aluminium utensils lose their lustre in a few days.

Question 3.
How many products are formed in each of the above reactions?
Answer:
A single product is formed in each of the above reaction.

Use your brain power! (Text Book Page No. 39)

Question 1.
What is the difference in the process of dissolution and a chemical reaction.
Answer:
In the process of dissolution, new substance is not necessarily formed. Whereas in a chemical reaction a new substance is definitely formed.

Question 2.
Does a new substance form when a solute dissolves in a solvent?
Answer:
It is not necessary that a new substance is always formed.

Fill in the blanks:

Question 1.
Organic waste is decomposed by micro-organism and as a result manure and……..are formed.
Answer:
Organic waste is decomposed by micro-organism and as a result manure and bio gas are formed.

Question 2.
……….is formed on mixing yeast in glucose solution under proper condition.
Answer:
Alcohol is formed on mixing yeast in glucose solution under proper condition.

Question 3.
The chemical reaction during which H_2(g) is lost is termed as………
Answer:
The chemical reaction during which H_2(g) s lost is termed as oxidation.

Question 4.
Corrosion can be prevented by using………
Answer:
Corrosion can be prevented by using antirust solution.

Question 5.
The chemical reactions in which heat is liberated are called………..reactions.
Answer:
The chemical reactions in which heat is liberated are called exothermic reactions.

Question 6.
The chemical formula of rust is………
Answer:
The chemical formula of rust is Fe₂O₃.H₂O.

Question 7.
A reaction in which heat is absorbed is called………reaction.
Answer:
A reaction in which heat is absorbed is called endothermic reaction.

Question 8.
The process of rusting or iron is………process.
Answer:
The process of rusting of iron is oxidation process.

Question 9.
when oil and fats are oxidised or even allowed to stand in air for a long time, they become ……….
Answer:
when oil and fats are oxidised or even allowed to stand in air for a long time, they become rancid.

Question 10.
……… are used to prevent oxidation of food.
Answer:
Antioxidants are used to prevent oxidation of food.

Question 11.
Carbon dioxide is passed through water. The reaction is a………reaction.
Answer:
Carbon dioxide is passed through water. The reaction is a combination reaction.

Question 12.
Calcium carbonate is heated. The reaction is a………..reaction.
Answer:
Calcium carbonate is heated. The reaction is a decomposition reaction.

Question 13.
Zinc strip is dipped in a CuSO₄ solution. The reaction is a……….reaction.
Answer:
Zinc strip is dipped in a CuSO₄ solution. The reaction is a displacement reaction.

Question 14.
Silver nitrate solution is added to NaCl solution. The reaction is a……….reaction.
Answer:
Silver nitrate solution is added to NaCl solution. The reaction is a double displacement reaction.

Question 15.
The slow process of decay or destruction of a metal due to effect of air, moisture and acids on it is known as……….
Answer:
The slow process of decay or destruction of a metal due to effect of air, moisture and acids on it is known as corrosion.

Rewrite the following statements by selecting the correct options:

Question 1.
The reaction of iron nail with copper sulphate solution is………reaction. (March 2019)
(a) double displacement
(b) displacement
(c) combination
(d) decomposition
Answer:
(b) displacement

Question 2.
Reddish brown deposit formed on iron nails kept in a solution of copper sulphate is
(a) Cu₂O
(b) Cu
(c) CuO
(d) CuS
Answer:
(b) Cu

Question 3.
The reaction CuSO_4(aq) + Zn_(s) → ZnSO_4(aq) + Cu_(s) is a……..reaction.
(a) displacement
(b) double displacement
(c) decomposition
(d) combination
Answer:
(a) displacement

Question 4.
………is a combination reaction.
(a) Cu + H₂SO₄ → CuSO₄ + H₂
(b) H₂ + Cl₂ → 2HCl
(c) \(2 \mathrm{HgO} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{Hg}+\mathrm{O}_{2}\)
(d) \(\mathrm{CaCO}_{3} \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{CO}_{2}\)
Answer:
(b) H₂ + Cl₂ → 2HCl

Question 5.
………..a decomposition reaction.
(a) \(\mathrm{CaCO}_{3} \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{CO}_{2}\)
(b) H₂O + CO₂ → H₂CO₃
(c) CaS + 2HCl → CaCl₂ + H₂S
(d) 2H₂ + O₂ → 2H₂O
Answer:
(a) \(\mathrm{CaCO}_{3} \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{CO}_{2}\)

Question 6.
In a chemical equation the……….are written on the left hand side.
(a) products
(b) reactants
(c) catalysts
(d) elements
Answer:
(b) reactants

Question 7.
The Δ sign written above the arrow indicates………..of the reaction.
(a) reactant
(b) product
(c) heat
(d) direction of the reaction
Answer:
(c) heat

Question 8.
The reaction KNO_3(S) + H₂O_(l) + Heat → KNO_3(aq) is a/an……….reaction.
(a) exothermic
(b) endothermic
(c) oxidation
(d) reduction
Answer:
(b) endothermic

Question 9.
The reaction NaOH_(S) + H₂O_(l) → NaOH_(aq) is a/an……..reaction.
(a) exothermic
(b) endothermic
(c) oxidation
(d) reduction
Answer:
(a) exothermic

Question 10.
A solution of Al₂(SO₄)₃ in water is……….
(a) blue
(b) pink
(c) green
(d) colourless
Answer:
(d) colourless

Question 11.
Carbon dioxide………..
(a) turns lime water milky
(b) is odourless
(c) is colourless
(d) All the three (a), (b) and (c) are correct
Answer:
(d) All the three (a), (b) and (c) are correct

Question 12.
……….is the correct set up to pass CO₂ through lime water.

Answer:
Correct set up D.

Question 13.
when……..is passed through fresh lime water, it turns milky.
(a) H₂
(b) CO
(c) CO₂
(d) SO₂
Answer:
(c) CO₂

Question 14.
Magnesium reacts with con. HCl to form………..salt.
(a) copper chloride
(b) ferrous chloride
(c) calcium chloride
(d) magnesium chloride
Answer:
(d) magnesium chloride

Question 15.
Zinc reacts with hydrochloric acid. The reaction is a reaction.
(a) combination
(b) decomposition
(c) displacement
(d) double decomposition
Answer:
(c) displacement

Question 16.
In a double displacement reaction,………… (Practice Activity Sheet – 1)
(a) ions remain at rest
(b) ions get liberated
(c) ions are exchanged
(d) ions are not created
Answer:
(c) ions are exchanged

State whether the following statements are True or False:

Question 1.
Rusting of iron is a fast reaction.
Answer:
False. (Rusting of iron is a slow reaction.)

Question 2.
Milk is set into curd is a chemical change.
Answer:
True.

Question 3.
The reaction between salt and water is an example of exothermic reaction.
Answer:
False. (The reaction between salt and water is an example of endothermic reaction.)

Question 4.
The speed of a chemical reaction depends on the catalyst used in the chemical reaction.
Answer:
True.

Question 5.
The simple form of representation of a chemical reaction in words is known as word reaction.
Answer:
True.

Question 6.
Nascent oxygen is always denoted by showing the symbol of oxygen.
Answer:
False. (Nascent oxygen is always denoted by showing symbol of oxygen [0] in square brackets.)

Question 7.
Antioxidants are used to prevent oxidation or food containing fats and oils.
Answer:
True.

Question 8.
When oils and fats are allowed to stand for a long time, they become rancid.
Answer:
True.

Question 9.
The chemical formula of rust is Fe₃O₄ .xH₂O.
Answer:
False. (The chemical formula or rust is Fe₂O₃ .xH₂O.)

Question 10.
Glucose combines with oxygen in our body and provides energy. The reaction is an endothermic reaction.
Answer:
False. (Glucose combines with oxygen in our body and provides energy. The reaction is an exothermic reaction.)

Question 11.
Chemical reactions in which reactants gain oxygen are reduction reactions.
Answer:
False. (Chemical reactions in which reactants gain oxygen are oxidation reactions.)

Question 12.
CuSO_4(aq) + Znl_(s) → ZnlSO_4(aq) + Cu_(s) is an example of decomposition reaction.
Answer:
False. (It is an example of displacement reaction.)

Question 13.
The chemical reactions in which heat is liberated are called endothermic reactions.
Answer:
False. (The chemical reactions in which heat is liberated are called exothermic reactions.)

Question 14.
The product or insoluble solid in chemical reaction is indicated by an arrow pointing upwards.
Answer:
False. (The product or insoluble solid in chemical reaction is indicated by an arrow ↑ pointing downwards.)

Question 15.
The rate of a reaction increases on increasing the temperature.
Answer:
True.

Question 16.
The digestion of food is a chemical decomposition process.
Answer:
True.

Question 17.
The reaction between sodium hydroxide and hydrochloric acid is a slow reaction.
Answer:
False (The reaction between sodium hydroxide and hydrochloric acid is a fast reaction.)

Question 18.
When calcium carbonate is heated, it decomposes into calcium oxide and oxygen gas.
Answer:
False (when calcium carbonate is heated. it decomposes into calcium oxide and carbon dioxide gas.

Question 19.
The rate of a chemical reaction changes in presence of catalyst.
Answer:
True.

Question 20.
Chlorines is an oxidant.
Answer:
True.

Taking into consideration the relationship in the first pair, complete the second pair. (OR) Complete the following:

Question 1.
2H₂ + O₂ → 2H₂O Combination reaction :: 2HgO → 2Hg + O₂ :……….
Answer:
Decomposition reaction

Question 2.
NH₃ + HCl → NH₄Cl : Combination reaction :: Fe + CuSO₄ → FeSO₄ + Cu :……..
Answer:
Displacement reaction

Question 3.
2C₂H₅OH + 2Na → 2C₂H₅ONa + H₂ : Oxidation :: CuO + H₂ → Cu + H₂O :……….
Answer:
Reduction

Question 4.
CuCl₂ + 2KI → CuI₂ + 2KCl : Double displacement :: Zn + 2HCl → ZnCl₂ + H₂ :……….
Answer:
Displacement reaction

Question 5.

Answer:
Combination reaction

Question 6.
CuI₂ : Brown :: AgCl :……….
Answer:
White.

Match the column in the following table:

Question 1.

Reactants	products	Type of chemical reaction
Fe + S	NaCl + H2O	Oxidation
CuSO4 + Zn	2CuO	Neutralization
2Cu + O2	ZnSO4 + Cu	Displacement
HCl + NaOH	FeS	Combination

Answer:

Reactants	products	Type of chemical reaction
Fe + S	FeS	Combination
CuSO4 + Zn	ZnSO4 + Cu	Displacement
2Cu + O2	2CuO	Oxidation
HCl + NaOH	NaCl + H2O	Neutralization

Rewrite the second column so as to match the item from first column or Match the following:

Question 1.

Column I	Column II
1. Reduction	(a) Type of a chemical reaction
2. Oxidation	(b) Combination with hydrogen
3. Double displacement	(c) Losing hydrogen
4. Displacement	(d) Exchange of ions

Answer:
(1) Reduction – Combination with hydrogen
(2) Oxidation – Losing hydrogen
(3) Double displacement – Exchange of ions
(4) Displacement – Type of chemical reaction.

Question 2.

Column I	Column II
1. Oils and fats are allowed to stand in air for a long time	(a) Slow  reaction
2. NaOH dissolves in water	(b) Rancid
3. Zinc is added to CuSO4 solution	(c) Exothermic reaction
4. Rusting of water	(d) Colourless Solution

Answer:
(1) Oils and fats are allowed to stand in air for a long time – Rancid
(2) NaOH dissolves in water – Exothermic reaction
(3) Zinc is added to CuSO₂ solution – Colourless solution
(4) Rusting of iron – Slow reaction.

Question 3.

Answer:
(1) Combination reaction – 2Cu +O₄ → 2CuO
(2) Double displacement reaction – AgNO₃ + NaCl → AgCl ↓ + NaNO₃
(3) Decomposition reaction – \(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11(\mathrm{s})} \stackrel{\Delta}{\longrightarrow} 12 \mathrm{C}_{(\mathrm{s})}+11 \mathrm{H}_{2} \mathrm{O}_{(\mathrm{g})}\)
(4) Displacement reaction – Zn+ 2HCl → ZnCl₂ + H₂ ↑

Classify each of the following reactions as combination, decomposition, displacement or double displacement reactions:

Answer:
Combination reaction

Answer:
Decomposition reaction

Answer:
Displacement reaction

Answer:
double displacement reaction

Answer:
Combination reaction

Answer:
double displacement reaction

Name the following:

Question 1.
The product formed in the thermal decomposition of sugar.
Answer:
Carbon is formed in the thermal decomposition of sugar.

Question 2.
The gas evolved when sorghum metal reacts with ethanol.
Answer:
Hydrogen (H₂) gas is evolved when sodium metal reacts with ethanol.

Question 3.
The precipitate formed when barium sulphide reacts with zinc sulphate.
Answer:
When barium sulphide reacts with zinc sulphide, a precipitate of barium sulphate is formed.
\(\mathrm{BaS}+\mathrm{ZnSO}_{4} \longrightarrow \underset{\text { precipitate }}{\mathrm{BaSO}_{4}}+\mathrm{ZnS}\)

Question 4.
The reducing agent used for the reduction of copper oxide.
Answer:
Hydrogen is used for the reduction of copper oxide.

Question 5.
The catalyst used to accelerate the rate of decomposition of hydrogen peroxide.
Answer:
Manganese dioxide (MnO₂) is used as a catalyst to accelerate the rate of decomposition of hydrogen peroxide.

Question 6.
which oxidising agent is used to oxidise ferrous sulphate.
Answer:
Potassium permanganate (KMnO₄) is used as an oxidising agent to oxidise ferrous sulphate.

Question 7.
The product formed in the oxidation of ethyl alcohol.
Answer:
Acetic acid is formed in the oxidation of ethyl alcohol.

Answer the following questions in one sentence each:

Question 1.
what is meant by a chemical equation?
Answer:
The simple representation or a chemical reaction in a condensed form with the help of chemical formulae is called a chemical equation.

Question 2.
what is meant by a word equation?
Answer:
The simple form or representation or a chemical reaction in words is known as word equation.

Question 3.
what happens in a combination reaction?
Answer:
A single compound (product) is formed from two or more substances during a combination reaction.

Question 4.
what happens in a displacement reaction?
Answer:
In a displacement reaction. a more reactive element displaces another element, having less reactivity, from its compound.

Question 5.
what happens in a decomposition reaction?
Answer:
A single substance is broken down and two or more substances are formed during a decomposition reaction.

Question 6.
what happens in a double displacement reaction?
Answer:
A precipitate is formed by exchange of ions between the reactants during a double displacement reaction.

Question 7.
IdentIry the type of following reaction:
\(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11} \stackrel{\Delta}{\longrightarrow} 12 \mathrm{C}+11 \mathrm{H}_{2} \mathrm{O}\) (Practice Activity Sheet – 2)
Answer:
The above reaction is a decomposition reaction.

Question 8.
what happens in an endothermic reaction?
Answer:
In an endothermic reaction, the reactants absorb heat to form products.

Question 9.
State the use of antioxidants in food containing fats and oils.
Answer:
Antioxidants are used to prevent oxidation of food containing fats and oils.

Question 10.
What are edible oils?
Answer:
Edible oils are compounds of alcohols and organic acids (carboxylic acids). The compounds formed are known as esters of carboxylic acids.

Question 11.
Is rancidity a phenomenon of oxidation or reduction?
Answer:
Rancidity is a phenomenon of oxidation.

Answer the following questions:

Question 1.
What do you understand by a physical change?
OR
Define physical change.
Answer:
The change in which only the physical state of a substance is changed; no new substance is formed. This change is temporary. During this change the composition of the substance does not change.

Question 2.
Explain giving two examples or physical change.
Answer:
(1) Conversion of ice into water is a physical change. On heating, ice melts into water. when the water is cooled, it freezes into ice. Thus, we get ice from water by a simple method and no new substance is formed. Hence, conversion of ice into water is a physical change.

(2) Magnetization of iron nail is a physical change. An iron nail magnetized by induction loses its magnetism as soon as it is detached from the magnet which induces magnetism in it. An iron nail magnetized by some other methods can also be demagnetized by simple means such as hammering or heating it. Thus, the magnetization of an iron nail can be easily reversed to get original nail. Hence, it is a physical change.

Question 3.
what do you understand by a chemical change?
OR
Define Chemical change.
Answer:
The change in which a substance or substances are converted into a new substance or substances, possessing properties altogether different from the original ones, is called a chemcial change. During this change, the original substance cannot be recovered by any simple means. This change is permanent.

Question 4.
Explain giving two examples of chemical change.
Answer:
(1) When carbon is burnt, carbon dioxide is formed. In this process carbon combines with oxygen, therefore carbon and oxygen are reactants, while curbon dioxide is a product. This change is permanent.
\(\mathrm{C}_{(\mathrm{s})}+\mathrm{O}_{2(\mathrm{g})} \stackrel{\text { Heat }}{\longrightarrow} \mathrm{CO}_{2(\mathrm{g})}\)

(2) When a magnesium wire is burnt in air, a white powder of magnesium oxide is formed. We cannot obtain magnesium from magnesium oxide by simple methods. Properties of magnesium oxide are altogether different from those of magnesium. A new substance MgO is formed in the reaction. Hence, this change is a chemical change.
\(\begin{array}{c}
2 \mathrm{Mg} \\
\text { Magnesium }
\end{array}+\mathrm{O}_{2} \stackrel{\Delta}{\longrightarrow} \begin{array}{c}
2 \mathrm{MgO} \\
\text { Magnesium oxide }
\end{array}\)

Question 5.
What is meant by a chemical reaction?
Answer:
A process in which some substances undergo bond breaking and are transformed into new substances by formation of new bonds is called a chemical reaction.

Question 6.
What is the importance of a chemical equation?
Answer:

1. Reactants are converted into products.
2. Mass is conserved.
3. Atoms are conserved.
4. The properties and compositions of the products of a chemical reaction are different from those of its reactants.
5. Generally, energy is either absorbed or evolved.

Question 7.
What are the conventions used in writing a chemical equation?
Answer:
Conventions used in writing a chemical equation:
(1) The reactants are written on the left hand side (LHS), while the products are written on the right hand side (RHS).

(2) Whenever there are two or more reactants, a plus sign (+) is written between each two of them. Similarly, if there are two or more products, a plus sign is written between each two of them.

(3) Reactant side and product side are connected with an arrow (→) pointing from reactants to products. The arrow represents the direction of the reaction. Heat is to be given from outside to the reaction, it is indicated by the sign Δ written above the arrow.

(4) The conditions like temperature, pressure, catalyst, etc., are mentioned above the arrow (→) pointing towards the product side.

(5) The physical states of the reactants and products are also mentioned in a chemical equation. The notations g, l, s, and aq are written in brackets as a subscript along with the symbols / formulae of reactants and products. The symbols g, l, s, and aq stand for gaseous, 1iquid. solid and aqueous respectively.

If the product is gaseous, instead of (g) it can be indicated by an arrow ↑ pointing upwards. If the product formed is insoluble solid, then instead of (s) it can be indicated by an arrow ↓ pointing downwards.

(6) Special information or names of reactants/products are written below their formulae.

Write the balanced equations for the following reactions:

Question 1.
Ba(OH)₂ + HBr → BaBr₂ + H₂O
Answer:
Step 1:
Rewrite the given equation as it is
Ba(OH)₂ + HBr → BaBr₂ + H₂O

Step 2:
write the number of atoms of each element in the unbalanced equation on both sides of the equation.

Element	Number of atoms in reactants	Number of atoms in products
Ba	1	1
Br	1	2
O	2	1
H	3	2

Step 3:
To balance the number of oxygen atoms:

Number of atoms of oxygen	In reactants	In products
To begin with	2 [in Ba(OH)2]	1 (in H2O)
To balance	2	1 × 2

To equalise the number of oxygen atoms, we use 2 as the coefficient of H₂O in the product.
Now, the partly balanced equation become as follows
Ba(OH)₂ + HBr → BaBr₂ + 2H₂O

Step 4:
Now, balance the number of hydrogen atoms.
In the partly balanced equation:

Number of atoms of hydrogen	In reactants	In products
To begin with	2 [in Ba(OH)2] 1 (in HBr)	4 (in 2H2O)
To balance	1 × 2 + 2	4

To equalise the number of hydrogen atoms, we use 2 as the coefficient of HBr in the reactants. Now, the equation becomes
Ba(OH)₂ + 2HBr → BaBr₂ + 2H₂O
Now, count the atoms or each element on both sides of the equation. The number of atoms on both
sides are equal. Hence, the balanced equation is
Ba(OH)₂ + 2HBr → BaBr₂ +2H₂O
Now indicate the physical states of the reactants and products.
Ba(OH)_2(aq) + 2HBr_(aq) → BaBr_2(aq) +2H₂O_(l)

Question 2.
KCN + H₂SO₄ → K₂SO₄ + HCN
Answer:
Step 1:
Rewrite the given equation as it is
KCN + H₂SO₄ → K₂SO₄ + HCN

Step 2:
Write the number of atoms of each element or group in the unbalanced equation on both sides of the equation.

Element	Number of atoms in reactants	Number of atoms in products
K	1	2
CN (group)	1	1
O	4	4
H	2	1
S	1	1

The number of oxygen atoms involved in different compounds on both sides (reactants and products) are equal. Therefore, balance the number of atoms of the second element, potassium.

Step 3:
To balance K atoms:

Number of atoms of Potassium	In reactants	In products
To begin with	2 (KCN)	2 (in K2SO4)
To balance	1 × 2	2

To equalise the number of potassium atoms, we use 2 as the coefficient of KCN in the reactants.
Now, the partly balanced equation becomes
2KCN + H₂SO₄ → K₂SO₄ + 2HCN
Now, count the atoms of each element on both sides of the equation. The number of atoms on both sides are equal. Hence, the balanced equation is
2KCN + H₂SO₄ → KgSO₄ + 2HCN
Now indicate the physical states of the reactants and the products.
2KCN_(aq) + H₂SO_4(aq) → K₂SO_4(aq) + 2HCN_(g)

Question 3.
CH₄ + O₂ → 4CO₂ + H₂O
Answer:
Step 1:
Rewrite the given equation as it is
CH₄ + O₂ → 4CO₂ + H₂O

Step 2:
Write the number of atoms of each element in the unbalanced equation on both sides of the equation.

Element	Number of atoms in reactants	Number of atoms in products
C	1	1
O	2	3
H	4	2

Step 3:
To balance the number of oxygen atoms:

Number of atoms of oxygen	In reactants	In products
To begin with	2 (in O2)	1 (in H2O) 2 (in CO2)
To balance	2 × 2	1 × 2 + 2

To equalise the number of oxygen atoms, we use 2 as the coefficient of O₂ in the reactants and 2 as the coefficient of H₂O in the product.
Now, the partly balanced equation becomes
CH₄ + 2O₂ → CO₂ + 2H₂O
Now, count the atoms of each element on both sides of the equation. The number of atoms on both sides are equal. Hence, the balanced equation is,
CH₄ + 2O₂ → CO₂ + 2H₂O
Now, indicate the physical states of the reactants and the products.
CH_4(g) + 2O_2(g) → CO_2(g) + 2H₂O_(l)

Answer the following questions:

Question 1.
what are the different types of chemical reaction?
Answer:
Types of chemical reaction

1. Combination reaction
2. Decomposition reaction
3. Displacement reaction
4. Double displacement reaction.

Question 2.
What is meant by a combination reaction?
OR
Define: combination reaction.
Answer:
When two or more reactants combine in a reaction to form a single product, it is called a combination reaction.

Question 3.
Give two examples of combination reaction.
Answer:
Examples of combination reaction :
(1) The ammonia gas reacts with hydrogen chloride gas to form the salt in gaseous state, immediately it condenses at room temperature and gets transformed into the solid state.

(2) Magnesium burns in air to form white powder of magnesium oxide as a single product.

(3) Iron reacts with sulphur to form iron sulphide.

Question 4.
What Is meant by a decomposition reaction?
Answer:
The chemical reaction in which two or more products are formed from a single reactant is called decomposition reaction.

Question 5.
what is meant by a thermal decomposition?
Answer:
The reaction in which a compound is decomposed by heating it to a high temperature is called thermal decomposition.

Question 6.
What is meant by a electrolytic decomposition?
Answer:
The reaction in which a compound is decomposed by passing an electric current through its solution or molten mass is called an electrolytic decomposition.

Question 7.
Give two examples of thermal decomposition.
Answer:
(1) At high temperature, calcium carbonate decomposes into calcium oxide and carbon dioxide.

(2) At high temperature sugar decomposes into black mass of carbon and water vapour.

Question 8.
Give an example of electrolytic decomposition.
Answer:
When an electric current is passed through acidified water, it is electrolysed giving hydrogen
and oxygen.

Question 9.
Study the following reaction and answer the questions asked.

(a) State the type of reaction.
(b) Define this reaction. (Practice Activity Sheet – 1)
Answer:
(a) The type of reaction is electrolytic decomposition reaction.
(b) The reaction in which a compound is decomposed by passing an electric current through its solution or molten mass is called an electrolytic decomposition.

Question 10.
what is meant by a displacement reaction?
Answer:
The reaction in which the place of the ion of a less reactive element in a compound is taken by another more reactive element by formation of its own ions, is called displacement reaction.

Question 11.
Give an example of displacement reaction.
Answer:
when zinc granules are added to the blue coloured copper sulphate solution, the zinc ions formed from zinc atoms take the place or Cu²⁺ ions in CuSO₄, and copper atoms, formed from Cu²⁺ ions comes out i.e. the more reactive zinc displaces the less reactive Cu from copper sulphate.

Question 12.
Observe the reaction and answer the following questions.
CuSO_4(aq) + Fe_(s) → FeSO_4(aq) + Cu_(s)
(a) Identify and write the type of chemical reaction.
(b) write the definition of above reaction. (Practice Activity Sheet – 3)
Answer:
(a) When iron powder is added to the blue coloured copper sulphate solution, the iron ions formed from iron atoms take the place or Cu²⁺ ions in CuSO₄, and copper atoms, formed from Cu²⁺ ions comes out i.e. the more reactive iron displaces the less reactive Cu from copper sulphate. Therefore this reaction is a displacement reaction.

(b) The reaction in which the place of the ion of a less reactive element in a compound is taken by another more reactive element by formation of its own ions, is called displacement reaction.

Question 13.
what is meant by a double displacement reaction?
Answer:
The reaction in which the ions in the reactants are exchanged to form a precipitate is called double displacement reaction.

Question 14.
Give two examples of double displacement reaction.
Answer:
(1) Solutions of sodium chloride and silver nitrate react with each other forming a precipitate of silver chloride and a solution of sodium nitrate.

White precipitate of AgCl is formed by exchange of ions Ag⁺ and Cl^– between the reactants.

(2) Barium suiphide reacts with zinc sulphate to form zinc sulphide and a white precipitate of barium sulphate.

white precipitate is formed by exchange of ions Ba⁺⁺ and SO₄^— between the reactants.

Question 15.
Write down what you understand from the following chemical reaction:
AgNO_3(aq) + NaCl_(aq) → AgCl ↓ + NaNO_3(aq)
Answer:
(i) The above reaction is a double displacement reaction.
(ii) AgNO₃ and NaCl are the reactants while AgCl and NaNO₃ are the products.
(iii) The reactants and the product NaNO₃ are in aqueous state. The product AgCl is formed in the form of precipitate.

Question 16.
Study the following chemical reaction and answer the questions given below:
AgNO_3(aq) + NaCl_(aq) → AgCl_(s)↓ + NaNO_3(aq)
(i) Identiry and write the type of chemical reaction.
(ii) write the definition of above type of chemical reaction.
(iii) Write the names of reactants and products of above reaction. (March 2019)
Answer:
(i) The type of chemical reaction: Double displacement reaction.
(ii) The reaction in which the ions in the reactants are exchanged to form a precipitate is called double displacement reaction.
(iii)

1. The above reaction is a double displacement reaction.
2. AgNO₃ and NaCl are the reactants while AgCl and NaNO₃ are the products.
3. The reactants and the product NaNO₃ are in aqueous state. The product AgCl is formed in the form of precipitate.

Question 17.
When sodium chromate solution is mixed with barium sulphate solution, a precipitate is formed.
(i) What is the colour of the precipitate formed?
(ii) Name the precipitate.
(iii) What is the type of chemical reaction?
Answer:
(i) The colour of the precipitate is yellow.
(ii) The yellow precipitate formed is barium chromate.
(iii) The type of chemical reaction is double displacement.

Question 18.
Explain the term Exothermic reaction.
Answer:
Exothermic reaction : The process in which heat is given out is called an exothermic reaction.
When NaOH_(s) dissolves in water, there is evolution of heat leading to a rise in temperature.
NOH_(s) + H₃O_(l) → NaOH_(aq) + Heat

Question 19.
State whether the following reactions are exothermic or endothermic:
(i) 3CaO. Al₂O_3(s) + 6H₂O_(l) → 3CaO. Al₂O₃. 6H₂O_(s) + Heat
Answer:
Exothermic reaction

(ii) 2CaSO₄. H₂O + 3H₂O → 2CaSO₄. 2H₂O + Heat
Answer:
Exothermic reaction

(iii) KNO_3(aq) + H₂O_(l) + Heat → KNO_3(aq)
Answer:
Endothermic reaction

(iv) NaOH_(s) + H₂O_(l) → NaOH_(aq) + Heat
Answer:
Exothermic reaction

(v) Transformation of ice into water.
Answer:
Endothermic reaction

(vi) Water turns into ice.
Answer:
Exothermic reaction

(vii) Cooking of food.
Answer:
Endothermic reaction

(viii) Burning candle.
Answer:
Exothermic reaction

Question 20.
What do you mean by slow speed reaction?
OR
Define: Slow speed reaction.
Answer:
The reaction which requires long time for completion i.e. occurs slowly is called slow speed reaction.

Question 21.
What do you mean by fast speed reaction?
OR
Define: Fast speed reaction.
Answer:
The reaction which is completed in short time i.e. occurs rapidly is called fast speed reaction.

Question 22.
Give two examples of slow speed reactions.
Answer:
(1) On heating potassium chlorate (KClO₃) it decomposes slowly into potassium chloride and oxygen gas.

This reaction requires long time for completion, therefore it is slow speed reaction.

(2) Rusting of iron is a slow speed reaction. In this reaction iron reacts with oxygen from air to form iron oxide.

Question 23.
Give two examples of fast speed reactions.
Answer:
(1) The reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) is a neutralization reaction and it is fast speed reaction.
NaOH_2(aq) + HCl_(aq) → NaCl_(aq) + H₂O_(l)
This neutralizaton reaction is completed in short time, therefore it is fast speed reaction.

(2) Aqueous solution of sodium chloride reacts with silver nitrate solution to form white precipitate of silver chloride (NaCl) and sodium nitrate.
NaCl_(aq) + AgNO_3(aq) → NaNO_3(aq) + AgCl ↓
This reaction is completed in short time, therefore it is fast reaction.

Question 24.
Write a short note on slow speed and fast speed reactions.
Answer:
Slow speed reaction:
The reaction which requires long time for completion i.e. occurs slowly is called slow speed reaction.
Examples:
(1) On heating potassium chlorate (KClO₃) it decomposes slowly into potassium chloride and oxygen gas.

This reaction requires long time for completion, therefore it is slow speed reaction.

(2) Rusting of iron is a slow speed reaction. In this reaction iron reacts with oxygen from air to form iron oxide.

This reaction requires long time for completion.

Fast speed reaction:
The reaction which is completed in short time i.e., occurs rapidly is called fast speed reaction.
Examples:
(1) The reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) is a neutralization reaction and it is fast speed reaction.
NaOH_(aq) + HCl_(aq) → NaCl_(aq) + H₂O_(l)
This neutralizaton reaction is completed in short time, therefore it is fast speed reaction.

(2) Aqueous solution of sodium chloride reacts with silver nitrate solution to form white precipitate of silver chloride (NaCl) and sodium nitrate.

This reaction is completed in short time, therefore it is fast reaction.

Question 25.
State the factors which affect the speed (or rate) of a reaction.
Answer:
The factors which affect the rate of a reaction are

1. Nature of the reactants.
2. Size of the particles of the reactants.
3. Concentration of the reactants.
4. Temperature of the reaction.
5. Catalyst.

Question 26.
How does the rate of reaction depend on the nature of the reactants? Illustrate with suitable example.
Answer:
(1) when the reactant combines with two or more other reactants then the rate of a chemical reaction depends on the nature of the reactants.

(2) Both Al and Zn reacts with dilute hydrochloric acid, H₂ gas is liberated and water soluble salts of these metals are formed. However, aluminium metal reacts faster with dil. HCl as compared to zinc metal.

(3) Al is more reactive than Zn. Therefore, the rate of reaction of Al with hydrochloric acid is higher than that of Zn. Hence, the nature of the reactant affect the rate of a reaction.

Question 27.
How does the rate of a reaction depend on the size of the particles of reactants?
Answer:
(1) In the reaction of dil. HCl and Shahabad tile, CO₂ effervescence is formed slowly. On the other hand, C₂ effervescence forms at faster speed with the powder of Shahabad tile.

(2) The above observation indicates that the rate of a reaction depends upon the size of the particles of the reactants taking part in the reaction. Smaller the size of the reactant particles taking part in a reaction faster will be the rate of reaètion.

Question 28.
How does the rate of a reaction depend upon the concentration of the reactants? Give suitable example.
Answer:
(1) A chemical reaction takes place due to collisions of the reactant molecules. Higher the concentrations of the reactants more will be the frequency of collisions and faster wifi be the rate of the reaction.

(2) In the reaction of dil. HCl and CaCO₃, CaCO₃ disappears slowly and CO₂ also liberates slowly. On the other hand the reaction with concentrated HCl takes place rapidly and CaCO₃ disappears fast.

(3) Concentrated acid reacts faster than dilute acid, that means the rate of a reaction is proportional to the concentration of reactants.

Slow reaction:
CaCO₃ + dli.2HCl → CaCl₂ + CO₂ + H₂O
Fast reaction:

Question 29.
How does the rate of a reaction depend upon the temperature of reactants? Give suitable example.
Answer:
(i) (1) When the temperature of the reactants is increased, the reactant molecules start moving with more velocity and their kinetic energy increases. As a result, the number collisions increases. Hence, the rate of chemical reaction increases.

(2) Lime stone on heating decomposes to give CO₂, which turns 1ime water milky. On the other hand, the lime water does not turn milky before heating the lime stone: because of the zero rate of reaction. The above observation indicates that the rate of a reaction increases on increasing the temperature.

(ii) Solid CaCO₃ does not decompose at room temperature when heated, it decomposes to give CaO and CO₂ that means the rise in temperature increases the rate of reaction. CaCO₃ room temperature No chemical reaction.

Question 30.
How does the rate if a reaction depend upon the catalyst? Give suitable example.
Answer:
(1) The substance in whose presence the rate of a chemical reaction changes, without causing any chemical change to it is called a catalyst.

(2) On heating potassium chlorate (KClO₃) decomposes into potassium chloride and oxygen slowly.
\(2 \mathrm{KClO}_{3} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{KCl}+3 \mathrm{O}_{2}\)
The rate of the above reaction neither increases by reducing the particle size nor by increasing the reaction temperature. However in the presence of manganese dioxide, KClO₃ decomposes at a comparatively lower temperature and oxygen is produced more briskly. No chemical change takes place in MnO₂ in this reaction. It acts as catalyst.

Question 31.
State the Importance of rate in a chemical reaction.
Answer:

1. The use of strong acid and strong base in a chemical reaction increases the rate of reaction.
2. In a chemical reaction, if the smaller size of the reactant particles, the concentrated solution, high temperature and use of catalyst increases the rate of chemical reaction.
3. The rate of chemical reaction is important with respect to environment.
4. If the rate of chemimal reaction is fast it is profitable for the chemical factories.
5. The ozone layer in the earth’s atmosphere protects the life of earth from the ultraviolet radiation of the sun. The process of depletion or maintenance of this layer depends upon the rate of production or destruction of ozone molecules.

Question 32.
Define Oxidation reaction.
Answer:
Oxidation: The chemical reaction in which a reactant combines with oxygen or loses hydrogen to form the product is called oxidation reaction.

Question 33.
Give examples of oxidation.
Answer:
(1) when carbon burns in air, it forms carbon dioxide. In this reaction carbon accepts oxygen, therefore, this is an oxidation reaction.
C_(s) + O_2(g) → CO_2(g)

(2) when sodium reacts with ethyl alcohol, sodium ethoxide and hydrogen gas is formed. In this reaction, hydrogen is removed from ethyl alcohol, therefore this is an oxidation reaction.

(3) Acidified potassium dichromate: (K₂Cr₂O₇/H₂SO₄) oxidises ethly alcohol to acetic acid.

Question 34.
What do you mean by oxidant? Explain with suitable example.
Answer:
The chemical substances which bring about an oxidation reaction by making oxygen available are called oxidants or oxidizing agents.

1. In the combustion of carbon, oxygen is an oxidant.
2. In the oxidation of ethly alcohol, potassium dichromate is used as oxidant.

Question 35.
Name the various oxidants. How nascent oxygen is liberated from these oxidants?
Answer:
K₂Cr₂O₇/H₂SO₄, KMnO₄/H₂SO₄ are the commonly used chemical oxidants. Hydrogen peroxide (H₂O₂) is used as a mild oxidant. Ozone (O₃) is also a chemical oxidant. Nascent oxygen is generated by chemical oxidants and it is used for the oxidation reaction.
O₃ → O₂ + [O].
H₂O₂ → H₂O + [O]
K₂Cr₂O₇ + 4H₂SO₄ → K₂SO₄ + Cr₂(SO₄)₃ + 4H₂O + 3[O]
2KMnO₄ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 3H₂O + 5[O]
Nascent oxygen is a state prior to the formation of the O₂ molecule. It is the reactive form of oxygen and is represented by the symbol as [O]

Question 36.
Acidified potassium permanganate (KMnO₄) is a chemical oxidant and explain, how acidified potassium permanganate oxidise ferrous sulphate (FeSO₄). Accordingly write a new definition of oxidation and reduction.
Answer:
Acidified KMnO4 oxidises ferrous sulphate (FeSO₄) to ferric sulphate Fe₂(SO₄)₃ and in addition to above K₂SO₄ and MnSO₄ by-products are formed.
2KMnO₄ + 10 FeSO₄ → 8H₂SO₄ → K₂SO₄ + 2MnSO₄ + 5Fe₂(SO₄)₃ + 8H₂O
2FeSO₄ → Fe₂(SO₄)₃
Ionic reaction :
2Fe₂ + 2SO₄²⁺ → 2Fe³⁺ + 3SO₂^2-
Net Ionic equation Fe²⁺ → Fe³⁺ + e^–
When ferric ion is formed from ferrous ion the positive change is increased by one unit. While this happens the rerrous ion loses one electron.

When metal or its ion loses electron, it is called an oxidation and gain of electron is called reduction.

Question 37.
Define reduction reaction.
Answer:
The chemical reaction in which a reactant gains hydrogen and loses oxygen to form the product is called the reduction reaction.

Question 38.
Give two examples of reduction.
Answer:
(1) When hydrogen gas is passed over black copper oxide a reddish coloured layer of copper is formed.
In this reaction an oxygen atom removed from CuO to form copper, hence, this is reduction.

(2) When hydrogen gas is passed over red hot coke, methane is obtained.
Here, hydrogen is added to coke (carbon). Hence, this is reduction.

Question 39.
What do you mean by reductant? Explain with suitable example.
Answer:
The chemical substances which bring about reduction by making hydrogen available are called reductant. In the preparation of methane from carbon, hydrogen is a reductant.

Question 40.
What are redox reactions? Identify the substances that are oxidised and the substances that are reduced in the following reactions:
(1) 2H₂S_2(g) + SO_2(g) → 3S_(s) + 2H₂O_(l)
(2) CuO_(s) + H_2(g) → CU_(s) + H₂O_(l)

Answer:
When oxidation and reduction take place simultaneously in a given chemical reaction, it is known as a redox reaction.
(1)

H₂S is oxidised and SO₂ is reduced.

(2)

CuO is reduced and H₂ is oxidised.

(3)

(1) Oxidation: H₂S, H₂O and HCl.
(2) Reduction: SO₂, CuO and MnO₂

Question 41.
Observe the following reaction and answer the questions given below:
BaSO₄ + 4C → BaS + 4CO
(1) what type of reaction is it? Justify.
(2) Give one more example.
Answer:
(1) This is a redox reaction. In this reaction the reduction of BaSO4 and oxidation of carbon take place simultaneously.

(2) Example
CuO+H₂ → Cu + H₂O
2H₂S + SO₂ → 3S + 2H₂O

Question 42.
What is corrosion?
Answer:
The slow process of decay or oxidation of metals due to various components of atmosphere is known as corrosion.
Iron rusts and a reddish coloured layer is collected on it. This is corrosion of iron.

Question 43.
How does rusting of iron occur?
Answer:
Iron when exposed to moist air forms a reddish layer of hydrated ferric oxide.

Question 44.
How can corrosion be prevented?
Answer:

1. Corrosion damages buildings, bridges, automobiles, ships, iron railings and other articles made of iron.
2. It can be prevented by using an anti-rust solution, coating the surface by a paint, processes like galvanising and electroplating with other metals.

Question 45.
What is corrosion? Do gold ornaments corrode? Justify.
Answer:
The slow process of decay or oxidation or metal due to the effect of air, moisture and acids on
it is known as corrosion.
(1) Gold is a noble metal. There is no effect or moist air or action of acid on it at any temperature.
(2) Pure gold is a very soft metal. it breaks and gets bent easily. Hence, in gold ornaments, gold is alloyed with other metals 1ike copper or silver in appropriate proportion to make it hard and resistant to corrosion. Hence gold ornaments do not get corroded.

Question 46.
Complete the process of iron rusting by filling the blanks. Suggest a way to prohibit the process.
The iron rust is formed due to reaction. Different regions on iron surface become anode and cathode.
Reaction on anode region:
Fe_(s) → Fe²⁺ _(aq) + 2e^–
Reaction on cathode region:
O_2(g) + 4H⁺ _(aq) +………→ 2H₂O_(l)
when Fe²⁺ ions migrate from anode region they react with……..to fomm Fe³⁺ ions.
A reddish coloured hytirated oxide is formed from……….ions. It is called rust.
2Fe³⁺ _(aq) + 4H₂O_(l) → +………+ 6H⁺ _(aq)
A way to prevent rusting………..
(Practice Activity Sheer – 2)
Answer:
The iron rust is formed due to electrochemical reaction. Different regions on iron surface become unode and cathode.
Reaction on anode region:
Fe_(s) → Fe²⁺ _(aq) + 2e^–
Reaction on cathode region:
O_2(g) + 4H⁺ _(aq) + 4e^– → 2H₂O_(l)
when Fe²⁺ ions migrate from anode region they react with water to form Fe³⁺ ions.
A reddish coloured hydrated oxide is formed from Fe³⁺ ions. It is called rust.
2Fe³⁺ (aq) + 4H₂O_(l) → + Fe₂O₃. H₂O_(s) + 6H⁺_(aq)
A way to prevent rusting by colouring with acrylic paints, Zn plating, galvanizing, anodizing, alloying, etc.

Question 17.
Deifne: Rancidity.
Answer:
When oil or fat or left over cooking oil for making food stuff undergoes oxidation ir stored for a long time and it is found to have foul odour called rancidity.

Distinguish between the following:

Question 1.
Combination reaction and Decomposition reaction.

Combination reaction	Decomposition reaction
1. In a combination re­action, two or more reactants take part in the chemical reaction.	1. In a decomposition reaction there is only one reactant in the chemical reaction.
1. In the combination reaction, only one product is formed.	2. In a decomposition reaction, two or more products are formed.

Question 2.
Oxidation and reduction
Answer:

Oxidation	Reduction
1. The chemical reaction in which reactants gain oxygen or lose hydrogen is called oxidation.	1. The chemical reaction in which reactants gain hydrogen or lose oxygen is called reduction.
2. A reducing agent undergoes oxidation.	2. An oxidising agent undergoes reduction.

Question 3.
Exothermic and Endothermic reaction.
Answer:

Exothermic reaction	Endothermic reaction
1. The reaction in which heat is evolved is called an exothermic reaction.	1. The reaction in which heat is absorbed is called an endothermic reaction.
2. The evolution of heat leads to a rise in the temperature of the solution.	2. The absorption of heat leads to a fall in the temperature of the solution.

Give scientific reasons:

Question 1.
Grills of doors and windows are always painted before they are used.
Answer:

• Grills of doors and windows are made from iron. Iron has a tendency to undergo corrosion.
• Paint does not allow air or moisture to come in contact with iron surface.
  Therefore, to prevent rusting of iron. grills of doors and windows are always painted before they are used.

Question 2.
Physical states of reactants and products are mentioned while writing a chemical equation.
Answer:
(1) while writing a chemical equation, gaseous, 1iquid and solid states are symbolised as (g), (l) and (s) respectively.

(2) This is done to make it more informative and to emphasise that those reactions occur in that manner only under those conditions. Hence, physical states of reactants and products are mentioned while writing a chemical equation.

Question 3.
Iron articles rust readily whereas steel which is also mainly made of iron does not undergo corrosion.
Answer:
(1) Iron articles rust readily as iron reacts with oxygen and moisture of air to convert into its hydroxide and oxide (Fe₂O₃. x H₂O), while steel is an alloy of iron, carbon and chromium.

(2) The properties of an alloy are different from the properties of its constituents. The added metals increase its resistance to corrosion. It is more durable and clean.

Question 4.
Concentrated hydrochloric acid reacts more vigorously with calcium carbonate than dilute hydrochloric acid.
Answer:

1. The rate of a reaction increases with the concentration of the reactant.
2. As concentrated hydrochloric acid contains more number of HCl molecules than those in an equal volume of dilute HCl, concentrated HCl reacts more vigorously with calcium carbonate.

Question 5.
Zinc powder reacts much faster with dil. H₂SO₄ than does granulated zinc of the Same mass.
Answer:
(1) In a reaction. the rate of the reaction depends upon the particle size of the solid reactant as the reaction takes place on the surface only. Smaller the particles are, the more will be their total surface area and faster will be the rate of the reaction.
(2) Hence, zinc powder reacts much faster with dil. H₂SO₄ than does granulated zinc.

Question 6.
When copper articles exposed to air for a long time, gets corroded.
Answer:
Copper oxidises to form black coloured laver of copper oxide. when copper oxide combines with carbon dioxide from air, copper loses its lustre due to formation of greenish layer of copper carbonate on its surface. Thus, copper articles exposed to air for a long time get corroded.

Question 7.
When silver vessels exposed to air turns blackish after sometime.
Answer:
On exposure to air, silver vessels turns blackish after sometime. This is because of the layer of silver sulphide (Ag₂S) formed by the reaction or silver with hydrogen suphide in air.

Explain the following reactions giving their balanced chemical equations:

Question 1.
Calcium carbonate (Lime stone) is heated.
Answer:
When calcium carbonate (Lime stone) is heated at high temperature it decomposes to form quicklime and carbon dioxide gas.

Question 2.
Copper reacts with dil. nitric acid.
Answer:
When copper reacts with dil. nitric acid, nitric oxide gas is formed.

Question 3.
Copper reacts with conc. nitric acid.
Answer:
When copper reacts with conc. nitric acid, reddish coloured poisonous nitrogen dioxide gas is formed.

Question 4.
Ammonia gas reacts with hydrogen chloride gas.
Answer:
When ammonia gas reacts with hydrogen chloride gas, it forms the salt ammonium chloride in gaseous state, but immediately it got transformed into the solid state.

Question 5.
Magnesium strip is burnt in air.
Answer:
When magnesium strip is burnt in air, a white powder of magnesium oxide is formed.

Question 6.
Calcium oxide is mixed with water.
Answer:
When calcium oxide (slaked lime) is mixed with water, calcium hydroxide is formed with evolution of large amount of heat.

Question 7.
Sugar is heated.
Answer:
When sugar is heated, it decomposes to form carbon (black substance).

Question 8.
Electric current is passed through acidulated water.
Answer:
When an electric current is passed through acidulated water, it decomposes into hydrogen and
oxygen gas.

Question 9.
Zinc powder is added to copper sulphate solution.
Answer:
When zinc powder is added to copper sulphate solution, more reactive zinc displaces less reactive copper from copper sulphate solution. The colourless zinc sulphate is formed with evolution of heat.

Question 10.
Iron powder is added to copper sulphate solution.
Answer:
When iron powder is added to copper sulphate solution, more reactive iron displaces less reactive copper from copper sulphate. The colourless ferrous sulphate solution is formed with evolution of heat.

Question 11.
Lead is added to copper sulphate solution.
Answer:
When lead is added to copper sulphate solution, more reactive lead displaces less reactive copper from copper sulphate. The colourless lead sulphate solution is formed with evolution of heat.

Question 12.
Potassium chromate solution is added to barium sulphate solution.
Answer:
When potassium chromate solution is added to barium sulphate solution, yellow precipitate of barium chromate is formed.

Question 13.
Calcium chloride solution is added to sodium carbonate solution.
Answer:
When calcium chloride solution is added to sodium carbonate solution, white precipitate of calcium carbonate is formed.

Question 14.
Sodium chloride solution is mixed with silver nitrate solution.
Answer:
When sodium chloride solution is mixed with silver nitrate solution, white precipitate or silver chloride is formed.

Question 15.
Dilute sulphuric acid is added to barium chloride solution.
Answer:
When dilute sulphuric acid is added to barium chloride solution, white precipitate of barium sulphate is rormed.

Question 16.
Calcium carbonate (Lime stone) is treated with dil. hydrochloric acid.
Answer:
When calcium carbonate (lime stone) is treated with dil. hydrochloric acid, carbon dioxide gas is formed.

Question 17.
Aluminium is treated with dil. hydrochloric acid.
Answer:
When aluminium is treated with dilute hydrochloric acid, hydrogen gas is liberated.

Question 18.
Magnesium is treated with hydrochloric acid.
Answer:
When magnesium is treated with hydrochloric acid, hydrogen gas is liberated.

Question 19.
Hydrogen peroxide is decomposed in the presence of manganese dioxide (MnO₂).
Answer:
When hvdrogen peroxide is decomposed in the presence of manganese dioxide (MnO₂), water and oxygen are formed.

Question 20.
Ethyl alcohol is treated with acidified potassium dlchromate.
Answer:
When ethly alcohol is treated with acidified potassium dichromate, acetic acid is formed. This is oxidation reaction.

Question 21.
Hydrogen gas is passed over black copper oxide.
Answer:
When hydrogen gas is passed over black copper oxide, a reddish coloured layer of copper is formed.