NCERT Solutions for Class 8 Science Science - NCERT Solution Chapter 5

Coal and Petroleum Class 8

Chapter 5 Coal and Petroleum Exercise Solutions

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Exercise : Solutions of Questions on Page Number : 62

Q1 :  

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


Answer :

The advantages of using compressed natural gas (CNG) and liquified petroleum gas (LPG) as fuels are:

(i) They can be burnt directly.

(ii) They can be transported easily through pipe lines.

(iii) They are clean fuels and do not give smoke when burnt.

(iv) They give a lot of heat energy when burnt.

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Q2 :  

Name the petroleum product used for surfacing of roads.


Answer :

Bitumen, a petroleum product, is used for surfacing roads.

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Q3 :  

Describe how coal is formed from dead vegetation. What is this process called?


Answer :

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Q4 :  

Fill in the banks.

(a) Fossil fuels are ________, ________and _________.

(b) Process of separation of different constituents from petroleum is called _________.

(c) Least polluting fuel for vehicles is __________.


Answer :

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Q5 :  

Tick True/False against the following statements.

(a) Fossil fuels can be made in the laboratory. (T / F)

(b) CNG is more polluting fuel than petrol. (T / F)

(c) Coke is almost pure form of carbon. (T / F)

(d) Coal tar is a mixture of various substances. (T / F)

(e) Kerosene is not a fossil fuel. (T / F)


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Q6 :  

Explain why fossil fuels are exhaustible natural resources.


Answer :

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Q7 :  

Describe characteristics and uses of coke.


Answer :

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Q8 :  

Explain the process of formation of petroleum.


Answer :

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Q9 :  

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

2

3

4

5

6

7

1991

1992

1993

1994

1995

1996

1997

7.9

7.8

8.3

7.4

7.1

9.2

11.5


Answer :

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Science - NCERT Solution - Science : CBSE NCERT Exercise Solutions for Class 8th for Coal and Petroleum will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

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