CBSE 8th Standard Science Coal and Petroleum Sample Question Papers Study Material - QB365 Set B | QB365

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CBSE 8th Standard Science Coal and Petroleum Sample Question Papers Study Material - QB365 Set B

Published on: 29/10/2025

Question Set B

CBSE 8th Standard Science Coal and Petroleum Sample Question Papers Study Material - QB365

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Std: 8th Standard CBSE - Science

chapter: Coal and Petroleum - Sample Question Papers

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Questions:

Generic 3

5 x 3 = 15

Mohan uses a diesel car which causes lot of pollution. But his friend Sohan has purchased an electric car which does not use fossil fuel and does not cause air pollution. Sohan told his friend that major pollution of air is caused by industries and combustion of fossil fuels by vehicles. Sulphur dioxide and nitrogen dioxide are released into air by burning coal and petroleum. Air is precious for our life, but air pollution causes many diseases like asthma, bronchitis and heart related disease. Read the given passage and answer the following questions.
(a) What are the formula of sulphur dioxide and nitrogen dioxide?
(b) What is the effect of increase in carbon dioxide in the atmosphere?
(c) What values are possessed by Sohan?

Write the difference between coke and coal

Sunlight and air are inexhaustible natural resources. Comment.

The following table shows the total power shortage in India from 1991-1997. Show the data in the form of a graph plot shortage percentage for the years on the Y-axis and the year on the X-axis.

S.No.	Year	Shortage (%)
1	1991	7.9
2	1992	7.8
3	1993	8.3
4	1994	7.4
5	1995	7.1
6	1996	9.2
7	1997	11.5

What are the advantages of using CNG and LPG as fuels?

Fill up / 1 Marks

5 x 1 = 5

__________is a petroleum gas in liquid form.

Petroleum is also called_________.

Least polluting fuel for vehicle is ___________________

Process of separation of different constituents from petroleum is called ____________________

10.

Fossil fuels are __________,____________ and ______________

True or False

6 x 1 = 6

11.

Oxygen in air is an exhaustible natural resource

(a)

True

(b)

False

12.

Kerosene is not a fossil fuel.

(a)

True

(b)

False

13.

Coal tar is a mixture of various substances.

(a)

True

(b)

False

14.

Coke is almost pure form of carbon

(a)

True

(b)

False

15.

CNG is more polluting fuel than petrol.

(a)

True

(b)

False

16.

Fossil fuels can be made in the laboratory.

(a)

True

(b)

False

Generic 2

6 x 2 = 12

17.

What is the full form of CNG and LPG?

18.

Give some examples of materials which are manufactured by using petrochemicals.

19.

What do you mean by carbonisation?

20.

Petrochemicals are obtained from where? Give examples

21.

Petroleum is called black gold. Why?

22.

Which product of coal is used as a reducing agent in the extraction of metals?

Generic 5

2 x 5 = 10

23.

Why petrol is exhaustible natural resource whereas sunlight is not? Explain.

24.

Name the products obtained and their uses when coal is processed in industry.

Multiple Choice Question

10 x 1 = 10

25.

A black, tough and porous substance is :

(a)

Coal tar

(b)

Coal Gas

(c)

Coke

(d)

Diesel

26.

Which is not an exhaustible natural resource?

(a)

Sunlight

(b)

Petroleum

(c)

Natural gas

(d)

Wildlife

27.

PCRA stands for:

(a)

Public Conservation Research Association

(b)

Petroleum Conservation Research Association

(c)

Public Council of Research Association

(d)

Partial Counting of Remaining Amendment.

28.

Coal is formed from the remains of

(a)

vegetation only

(b)

animals only

(c)

both vegetation and animals

(d)

neither vegetation nor animals

29.

Fossil fuels are obtained from

(a)

remains of non-living materials

(b)

dead remains of birds only

(c)

dead remains of insects only

(d)

dead remains of living organisms

30.

Exhaustible natural resources are

(a)

unlimited in quantity

(b)

not dependent on nature

(c)

limited in quantity

(d)

not exhausted by human activities

31.

Coal is processed in industries to get some useful products. Which of the following is not obtained from coal?

(a)

Coke

(b)

Coal tar

(c)

Coal gas

(d)

CNG

32.

Which of the following is a pair of exhaustible natural resources?

(a)

Coal and soil

(b)

Air and sunlight

(c)

Water and petroleum

(d)

Wildlife and minerals

33.

Air is a natural resource and cannot be exhausted by human activities. It is known as inexhaustible natural resource. Which of the following is another inexhaustible natural resource?

(a)

Coal

(b)

Petroleum

(c)

Sunlight

(d)

Minerals

34.

Various materials which are obtained from nature are called natural resources. Which of the following is not a natural resource?

(a)

Minerals

(b)

Water

(c)

Soil

(d)

Plastic

Match the following

4 x 1 = 4

35.

LPG

36.

Petroleum

37.

Natural gas

38.

Used for road surfacing

1 Marks

4 x 1 = 4

39.

Where is oil found in India?

40.

Write one use of coal.

41.

Name some useful products obtained from coal when it is processed in industry.

42.

What are fossil fuels?

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Answers Key:

Generic 3

5 x 3 = 15

(a) Formula of sulphur dioxide is S0₂. Formula of nitrogen dioxide is N0₂
(b) Increase in concentration of carbon dioxide in the atmosphere will increase the temperature of earth's atmosphere.
(c) Sohan is aware about the safety of environment from air pollution

Difference between coke and coal are as follows:

Coke	Coal
It is almost pure form of carbon	It mainly contains mainly carbon.
It is an amorphous form of carbon	It is a non-crystalline form of carbon
It is obtained by heating coal in the absence of air.	It is obtained by the decay of vegetation which existed millions of year ago.

These resources are present in an unlimited quantity in nature and are not likely to be exhausted by human activities.

Scale along X -axis, 1 unit = 1 year and along Y-axis, 1 unit = 1%

The advantages of using CNG and LPG as fuels are as follows :
(i) CNG and LPG are clean fuels.
(ii) They do not produce pollution.
(iii) They are easily available.
(iv) They can be used directly for burning.
(v) They are easy to transport.
(vi) Their cost is low.

Fill up / 1 Marks

5 x 1 = 5

()
LPG

()
black gold

()
Compressed Natural Gas (CNG)

()
refining

10.

()
coal, petroleum, natural gas

True or False

6 x 1 = 6

11.

(b)
False

12.

(b)
False

13.

(a)
True

14.

(a)
True

15.

(b)
False

16.

(b)
False

Generic 2

6 x 2 = 12

17.

CNG: Compressed Natural Gas.
LPG: Liquefied Petroleum Gas.

18.

Examples of materials which are manufactured by using petrochemicals are detergents, fibres, plastics, drugs, dyes, perfumes, fertilisers, synthetic rubber, etc.

19.

The slow process of conversion of dead vegetation into coal is called carbonisation.

20.

Those chemicals which are obtained from petroleum and natural gas are called petrochemicals. Some examples of petrochemicals are methyl alcohol, ethyl alcohol, acetone, benzene, hydrogen, etc.

21.

Petroleum is called black gold due to its great commercial importance.

22.

Coke

Generic 5

2 x 5 = 10

23.

The natural resources which are present in a limited quantity in nature and can be exhausted (used up) by human activities are called exhaustible natural resources, e.g. coal, petroleum, natural gas, minerals, forests, wildlife, etc.
It requires millions of years for the conversion of the dead organisms into petroleum, from which petrol is separated. So, once the present stock of it gets exhausted, no new supplies of it will be available to us in the near future, whereas sunlight is present in an unlimited quantity in nature, so it is inexhaustible natural resource. It is not likely to be exhausted by human activities.

24.

When coal is strongly heated in the absence of air in closed retorts, various useful products are obtained. These are coke, coaltar and coal gas.
Uses of coke Coke is used in the manufacture of steel and in the extraction of many metals. It acts as a fuel and it is a better fuel than coal.
Uses of coal tar The various compounds obtained from coal tar are used as starting materials for manufacturing a large number of substances used in everyday life and in industry like synthetic dyes, drugs, explosives, perfumes, plastics, paints, photographic materials, roofing materials, etc. Naphthalene balls used to repel moths and other insects are also obtained from coaltar.
Uses of coal gas It is used as a fuel in many industries situated near the coal processing plants.

Multiple Choice Question

10 x 1 = 10

25.

26.