Chapter-1 CHEMICAL REACTION AND
EQUATIONS
Q-1. Why parents are
advised to discourage their children to eat chips and junk food?
Chapter-2 ACID, BASES AND
SALTS
Q-2. Brushing our teeth twice a day is a well known saying.
Justify this statement.
Q-3. Farmers are
using a large number. of Pesticides and fertilizers in their fields to increase
crop production and to enhance their profits. But by doing so they are causing damage
to the soil as well as to the environment. Do you agree with this statement?
Why should we avoid eating fruits and vegetables without washing them properly?
Chapter -3 METALS AND NONMETALS
Q-4. Gold is a very precious metal. Pure gold is
very soft it is therefore not suitable for making jewellery. It is alloyed with
either Silver or Copper to make it hard. But sometimes jewellers mix a large
quantity of copper and Silver in gold to earn more profit.
Q-i. What precautions should you take while purchasing
gold jewellery?
Q-(ii). Why does Government insist on purchasing Hall Marked
jewellery?
Q-5. Corrosion is a serious problem. Every year an enormous
amount of money is spend to replace damaged iron. What steps can be taken to
prevent this damage.
Q-6. Mercury is the
only metal found in the liquid state. It is largely used in thermometers to
measure the temperature. But mercury is a very dangerous metal as its density
is very high. What two precautions you would take while handling the equipments
containing Mercury?
Chaper-4. CARBON AND ITS COMPOUNDS
Q-7. Mrs. Anita observed that her cooking utensils are
becoming black in colour and the flame of her gas stove is yellowish in colour
what can be the reason for this sooty flame. How is this problem harmful for
our environment? What steps should be taken to stop this process.
Q-8. Ethanol is used on a large scale at
commercial level this is a very useful chemical. It is commonly called alcohol
and is the active ingredient of alcoholic drink. But consumption of alcohol
also causes drunkenness and this practice is Socially condemned. As a
responsible student of class –X what steps you would take to discourage the use
of alcohol
Q-9. You must have
seen advertisements stating that some vegetable oils are healthy. Saturated
fatty acids which are said to be harmful for health. Why vegetable oils are
considered healthy then Saturated fatty acids (ghee)? What precautions you
would take in selecting a cooking oil
Chapter – 5 PERIODIC CLASSIFICATION OF ELEMENTS
Q-11. Ria and Rama are students of Class-X. Ria is very much
organized and maintained. The teachers love her. She earns a great respect in
the class where as Rama is un-organised and always faces a lot of problems in handling
life situations.
(i). In your opinion how
organization help in daily life?
(ii). How can you relate the above fact with the
chapter classification of elements. How classification of elements help us in
studying them properly?
Q-10. Adulteration is becoming a very serious problem of
our society. Study reveals that more people die because of food adulteration
rather than hunger. Shopkeepers mix harmful chemicals and things in food items
to earn more profit which may even lead to deaths.
(i). Being a responsible
citizen how can you fight against adulteration?
(ii). Give an example of food
adulteration.
(iii) How will you test about the adulteration in
this food item?
Chapter-6 LIFE
PROCESSES
Q-12. Eating junk food results in several health problems
including obesity and heart problems. Still lot of children prefer to eat junk
food. What suggestion you will give to avoid eating junk food.
Q-13. Regular physical exercise for 45 minutes is
advisable for normal functioning of human body. Comment upon the advantages of
this statement/practice in daily life.
Q-14. Rahul wants to build up his body very quickly without
following right exercise regime and balanced diet. Instead he started eating
readymade food supplement.
i). In your opinion was the
step taken by Rahul is right. Justify your answer.
ii). What are the harmful
effects of taking artificial health supplement without consulting a physician.
Q-15. Om, Rohit and Kishore always remain in a hurry. One
day, during lunch hour they all quickly gulped food and went out to play.
(i). Om suddenly developed
stomach ache while playing. What according to you might have gone wrong with
him.
Q-16. Meena who is studying in Class-X gets tired
very soon and her skin colour is turning pale, her haemoglobin content in the
blood is also low She is really confused about this situation.
i). Which disease is she
suffering from.
ii). What kind of diet should
she take to overcome this problem.
Q-17. Sohan went to his town Agra 200 Km away from Delhi
with his father in a car. On the way there was lot of traffic jam. Sohan while
reaching his town felt nausea and headache. He had inhaled lots of toxic
polluted gases.
i). Which system/part of his
body gets affected.
ii). What steps could be taken to reduce air
pollution
CHAPTER-7. CONTROL AND
COORDINATION
Q-18. Mayank‟s father never bothered to check the brand/contents of
the salt he had purchased from the market. Mayank noticed that her sister had
developed swollen neck. The doctor advised her to eat Iodised Salt.
i). Name the disease from which
Mayank‟s sister suffered.
ii). Why the doctor has advised
her to eat Iodised Salt?
Q-19. Injections are given to the cattle for the production
of milk.
(i). Do you think it is a right
practice.
(ii). What harm is this practice causing us?
Q-20. Often the road accidents victims faced really a
tough time due to the shortage of blood in the hospital.
i). Give suggestion to avoid
shortage of blood in the blood bank.
Q-21. A person is taking the insulin injection everyday.
(i). Name the disease he is
suffering from.
(ii). How does healthy life
style help this patient to control this disease?
Q-22. Most of students suffer from exam stress and anxiety
during exam days.
i). Suggest three good habits
which students should adopt to tackle this problem.
Q-23. Generally some of teenagers readily come under bad
influences under peer group pressure.
(i). Why does teenagers readily
come under this influence.
(ii). Suggest methods to
overcome such problems.
Chapter-8 HOW DO ORGANISMS
REPRODUCE
Q-24. We hear and read about female foeticide,
which is really is a wrong practice. In some families, be it rural or urban,
females are tortured for giving birth to a girl child. They do not seem to
understand the scientific reason behind the birth of a boy or a girl.
In your opinion,the approach of
the society towards mother in this regard is correct or not? Explain the
scientific reason.
Q-25. Mr. R. Sharma was suffering from various
types of diseases presently. He went for thorough health checkups and was
diagnosed as HIV+ve. Soon this news spread in his neighborhood and on account
of this, he faced social isolation.
Comment upon:-
i. Do you think people‟s
indifference towards HIV+ve people is justifiable?
What kind of approach should we have towards the persons
suffering from AIDS.
ii. How can one protect oneself from this diseases?
Q-26.
It
is a well known fact that pregnant woman‟s
health is a backbone of every family, society and thus nation
i).
Which tissue is responsible for providing nutrition from mother to growing
embryo?
ii).
According to you, what can be the likely measures to maintain woman health
during pregnancy.
Q-27.
How
can one justify this statement that “Like physical mental and social fitness,
human beings need fitness of reproductive life” i.e. „Reproductive Health‟.
Q-28.
Arjun
and Ram are students of Class-IX. Both were initially good in studies. After
some time academic performance of Arjun started declining and he became
irritable. This change was noticed by his class teacher the teacher, while
interacting with Arjun found out that he had six siblings and whole family
lived in a single room.
Mother was not able to devote
much attention to him and resources were not sufficient.
After
going through the situation, what are the factors, which you think, are
responsible for change in behaviour and his poor performance in studies.
Chapter-7 CONTROL AND
COORDINATION
Q-29. Rahul got a bike on his 18th Birthday from
his parents. His father instructed him always to wear helmet while driving. He
reluctantly obeys him but does not tie the straps of Helmet properly.
(i). According to you, what
danger Rahul can face in future while he is driving his bike.
(ii). Which vital organ/organs
gets protection by wearing the helmet while driving the two wheelers?
CHAPTER-10-11 LIGHT, HUMAN
EYE AND COLOURFUL WORLD
Q-30. „Vision‟ is one
of the wonderful gifts given to us by God. But most of the people never take
care of their eyes. Care for eyes should be taken, suggest some methods for
proper eye care
Q-31. Suddenly a news spread in the school that a student
of class-IX-A has expired due to heart attack, but he has donated his beautiful
eyes to one of his friend. All the members of school felt very sad for his
untimely death, but on the other side they were overwhelmed on hearing the
donation of his eyes to his friend, who would now be able to see this beautiful
nature.
Do you think that the student
who expired had done good job? Is it worth to donate vital organs?
Q-32. In a class-room, there were four or five
students who were not able to read the material written on black board. The
other students of class helped them to sit at the front seat, so that they can
also read the material written on blackboard.
What can be the reason behind it, what will you recommend
these students and what precautions you will insist them?
Q-33. On the rainy day, Ram reached his grandfather‟s place in village. On the way to house he saw a
beautiful rainbow in this sky. In night, he saw lots of twinkling stars in the
clear sky. He was very excited to see these beautiful natural phenomenon, which
he was not able to see in th city, where he lived with his father.
Do you think that pollution in
atmosphere effects the formation of rainbow and twinkling of starts. Do you
agree with the fact that pollution free environment will strengthen such
natural phenomenon in the cities as well ellaborate.
Q-34. We mostly read in newspaper, that few
students went for picnic, but while boating one or two drowned in river.
Situation below can be the reason for this.
Situation- while boating with parents, a child saw a
beautiful fish in the river or lake. He/she tried to catch it, thinking that it
is very closer to him/her. But situation became worse when he/she drowned in
the river/lake instead of catching it Name the phenomenon that shows the
apparent position of fish, explain it.
What precautionary measures you will suggest while
boating.
Q-35. Generally, we observe that the adolescence age is the
age of change in physical appearance, behaviour, mental level, etc. Because of
these changes, the child of this age always loves to stand in front of mirror
and feel happy. But if we think little more, we will observe that the mirror
reflect both image physical as well as internal feelings that is whatever we
think is also reflected by mirror.
Do you agree with this, comment on it.
Chapter 12-13 ELECTRICITY,MAGNETIC EFFECTS OF ELECTRIC CURRENT
Q No. 36 Suddenly the news spread in the school that the fire
had broke out in examination room. All the important papers and office
documents were burnt. The reason for this mishap was short circuiting.
What is short circuiting and
what precautions can be taken to avoid such tragic incidents.
Q No. 37 Mr. Sharma a property dealer, had many expensive
appliances at his home like fridge 3 air conditioners, geyser etc but he forgot
to put earth wire connections to these appliances. One day his younger daughter
opened the fridge and suffered a severe electric shock though, she was saved.
Why it happened and how can one
save himself of herself from these electric shock by these electrical
appliances.
Q No. 38 We generally use a device in an electrical circuit,
which is essential for safety of appliance as well as life.
What is that safety device
called?
How it works and helps us to
live happily?
Do you think it is necessary
for every place where electricity is used.
Q No.39 One day science teacher was teaching in her class, one
of her student was very sad. The teacher asked her the reason, the way she
responded amaze the students in the class room. She told the teacher of the
mishap which took place in her locality where four members of a family died, as
they were trying to theft electricity by connecting the conducting wire with
the live wire on the street.
Now do you think is this
practice of electricity theft good, how does one‟s conscience allows it. What advice would you like to
give to improve such mind set?
Q No. 40 One day sohan went to his friend‟s house. He was surprised to see that most of the
electrical appliances at his house were functional. For example tube light and
fan in all room, two TV‟s,
computer, light of toilet & kitchen were switched on sohan told his friend
that this is not the way to use electricity.
Now the question arises whether
this habit of consuming electrical energy is acceptable or not. Will it not
effect like economical condition of family as well as the nation how?
Chapter – 14 SOURCE OF ENERGY
Q No. 41 In a school, there are seventy teachers most of them
come by their personal vehicle. Where as there are many teachers who come from
the same place.
Is this practice of commuting
to school will help nature. Justify it?
Q No. 42 During the natural disaster (Tsunami) at Japan, the
nuclear reactors were damaged, due to which hazardous radiation affected the
large area.
i. What will be the reason for
this damage?
ii. How it affected the people
and environment?
iii. Do you think that nuclear
energy is good for nature?
Q No. 43 In a village people burn wood and cow dung as a fuel
for basic necessity. In other nearby village, they have bio gas plant in which
bio waste is used to prepare bio gas.
If we compare the situation of
both village, which practice you will prefer the best and why?
Q No. 44 You would have seen at the roofs of the minister‟s house, hospital, hotels etc, solar panel for
electricity and solar heater for hot water are placed. Now a days most of the
people are preferring these methods.
Why they are preferring these
types of method?
What kind of source of energy
is used here?
How it will effect our
environment.
Q No. 45 Conserving energy has become the need of the society &
nature, be it in the transport house hold or industries. Energy conservation
has been recognized as a national issue for long time.
As a responsible citizen of India, what steps would
you take to conserve energy
Chapter – 15 OUR ENVIRONMENT
Q No. 46 It is often advised to stop our vehicles engine at red
light and also to drive car / vehicles at constant speed.
Based on the above statement, answer the following
question.
1. Which type of fuel is used in vehicles? Is it
renewable or non renewable.
2. How can you contribute towards saving these fuels at
your level?
Q No. 47 Number of vultures is decreasing
remarkably. Now a days which is a matter of concern.
1. Vultures belong to which category of animal.
2. What is their role in nature to maintain ecological
balance.
Q No. 48 Newspaper reports about the alarming
increase in pesticides level in packed food items Some of states have even
banned these food items.
1. What are the sources of
these pesticides in these food items.
2. Name the biological
phenomenon associated with accumulation of pesticide in the food chain.
Q No. 49 Ozone depletion / Ozone hole is a cause of concern now
a days.
1. What are the causes of ozone
depletion.
2. As students what steps will
you advise to reduce ozone depletion.
Q No. 50 Acid rain is causing damage to monuments / Buildings
etc. and also harm the flora and fauna.
1. What is the cause of acid
rain.
2. What essential changes in
our daily life can lie done to prevent acid rain / damage caused by acid rain.
Q No. 51 Plastic production is increasing day by day in spite
of the fact that plastic is harmful for the environment.
Based on the above statement
answer the following.
1. What are the harmful effects
of plastic usage?
2. In our day to day situation
what are the alternatives that we can use instead of plastics.
Chapter 16 Management of
Natural Resources
Q No. 52 Chipko movement was stared in 1970s in a small village
of Garhwal high up in Himalayas villagers stood against greedy contractors.
Women folk hugged the trees.
The chipko – movement spread slowly to all nearby areas under the leadership of
Shri Sunder Lal Bahuguna.
1. Do you feel inspired by this
movement which prevented felling of trees.
2. Do you think that local
people are real stake holders?
3. Which old belief has been
challenged by chipko movement?
Q No. 53 There are certain N.G.O‟s which motivate the general public to donate clothes
books toys, stationary items, utensils etc to them. There N.G.O.‟s further segregate and distribute these items to the
needy.
In your opinion what objective / objectives are fulfilled
by this initiative?
Q No. 54 Reena is a student of class X of a Govt. School she is
a member of Eco club‟
of her school.
What suggestions would like to
give Reena to improve the environment in her school?
Q No. 55 Human population was less in early days.
Men used to live in harmony with nature however, in present time tremendous
growth of population and science & technology is resulting in fast
depletion of natural resources.
1. Don‟t you think, it is high time
that humans should realize that their own survival is in danger if they do not
follow the path of sustainable development.
2. What are the ill effects of
unsustainable development?
Q No. 56 My sister is in habit of keeping the tap open while
brushing her teeth. She loves to bathe under shower. My neighbour uses hosepipe
attached to drinking water supply pipe for washing his scooter & car.
According to me their way of
handling the most precious source water is absolutely wrong.
1. Do you agree with me or not?
2. What changes in the above
situation can be done to conserve water.
Q No. 57 Govt. of India has recently instituted an Amrita Devi
Bishnoi National Award for wildlife conservation in the memory of Amrita Devi
Bishnoi. Who sacrified her life along with 363 others for the protection of
khejri trees near Jodhpur in Rajasthan. Based an the above statement answer the
following question.
1. How trees are important to
us?
2. How can you protect trees?
3. What is the significance of
Van Mahotsava?
Q No. 58 Sneha and Sugandha are friends. Sneha belongs to a
rich family and she believes in throwing and discarding the things after use
while Sugandha does not like wastage and she reused the things. Based on above
information answer the following questions :-
1. How reusing the things avoid
wastage.
2. List any two examples where
you can reuse the things.
3. What change can you make in
your habits to become more Eco-friendly.
Q No. 59 Business is not only about accumulating wealth and
glory. It is not about growth for the sake of size. It is about being a good
corporate citizen and the admirer of the environment. How can you say that
being a good citizen is more important than becoming a successful businessman?
How can you become a good and responsible citizen?
Q No. 60 Water is one of our most precious commodities and no
life can survive without it. It has been predicted that water scarcity will
become the subject of “Wars” is the near future.
1. Write any two ways in which
water is getting polluted?
2. Write any two measures to
stop water pollution at your level?
Q No. 61 Tourism sector is a major source of income for Govt.
To obtain more income the hills are being converted into tourist places where
rest houses and resorts are made and millions of tourists visit those hills.
They throw plastic covers, bottles and other litter there and destroy them. As
a responsible citizen of the country what two precautions you would take while visiting
tourist place.
Q No. 62 Human actions are leading to environmental problems.
But we need not feel powerful or helpless as there are many things we can do to
make a difference.
Keeping in view the above
statement answer the following questions:-
1. What are the three R‟s which can make a difference in our environment.
2. How can you contribute at
your own level to save the environment.
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