NCERT Class 8 Science Chapter 5 Coal and Petroleum Extra Questions and Answers
Class 8 Science Chapter 5 Extra Questions and Answers – Coal and Petroleum. Here in this Page Class VIII Students can Learn Extra Questions & Answer 5th Chapter Science fully Inside.
We Provided Here Coal and Petroleum Science Chapter 5 Long Answer Type Question, Very Short Type Questions (VSA) / MCQ Type Questions, Short Type Questions (SA).
1) Fill in the blanks:
a) ____ is an inexhaustible natural resource. (Sunlight)
b) ____ is used for road surfacing.(Bitumen)
c) ____ is called black gold.(Petroleum)
d) ____ is used in Vaseline.(Paraffin wax)
2) Multiple choice questions:
a) Burning of ____ fuel is a major cause of air pollution?
a) Petroleum b) Natural gas
Ans. a) Petroleum
b) Naphthalene balls are obtained from _____?
a) Coal gas b) Coke c) Coal Tar
Ans. c) Coal Tar
c) ____ is used for power generation?
a) Petroleum b) Compressed natural gas
Ans. b) Compressed natural gas
d) ____ is used as a fuel of jet aircrafts?
a) Petrol b) Diesel c) Kerosene
Ans. c) Kerosene
3) Answer the following questions:
a) What are fossil fuels? Give an example.
Ans. The exhaustible natural resources which were formed from the dead remains of living organisms, are known asfossil fuels.
Example – Coal.
b) What is an almost pure form of carbon? Write one use of it.
Ans. Coke is an almost pure form of carbon.
One use of coke – it is used in the manufacture of steel.
c) What are inexhaustible natural resources? Give an example.
Ans. The resources which are present in unlimited quantity in nature and are not likely to be exhausted by human activities, are called inexhaustible natural resources.
Example – air.
d) What are exhaustible natural resources? Give an example.
Ans. The resources which are present in limited quantity in nature and can be exhausted by human activities, are called exhaustible natural resources.
Example – natural gas.
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e) Write the uses of coal?
Ans. The uses of coal are,
I) Coal is one of the fuels used to cook food.
II) It is used in thermal power plants to produce electricity.
III) Coal is also used as a fuel in various industries.
4) Match the items of column I with the information of column II:
Column I Column II
a) Coal Tari) used as a source of heat
b) Wildlife ii) used as a fuel in light automobiles
c) Coal gas iii) used as a fuel in heavy motor vehicles
d) Petrol iv) used in the manufacture of plastics
e) Diesel v) an exhaustible natural resource
Ans. a) – iv), b) – v), c) – i), d) – ii), e) – iii).
5) Petroleum is a dark oily liquid. It has an unpleasant odor. It is a mixture of various constituents such as petroleum gas, petrol, diesel, lubricating oil, paraffin wax, etc. The process of separating the various constituents/fractions of petroleum is known as refining. It is carried out in a petroleum refinery.
a) _____ is a dark oily liquid.(Petroleum)
b) What is refining?
Ans. The process of separating the various constituents/fractions of petroleum is known as refining.
c) Refining is carried out in a _____. (Petroleum refinery)
d) Name any three constituents of petroleum.
Ans. Three constituents of petroleum are petrol, diesel and lubricating oil.
More Extra Questions and Answers
Q.1) Write one use of following.
1.) LPG
Ans : For cooking, industry
2.) petrol
Ans:Motor fuel.
3.) paraffin wax
Ans :Candle, Vaseline.
4.) kerosene
Ans :Stove fuel, lamp
5.) Diesel
Ans :Fuel for heavy vehicle, generators.
Q.2.) Distinguish between the following
1.) Exhaustible and Inexhaustible nature
Exhaustible nature |
Inexhaustible nature |
Resources present in limited quantity and are likely to be exhausted by human. | Resources present in unlimited Quantity and are not likely to be exhausted by human. |
Example -Petrol ,gas. | Example -sunlight, air. |
Q.3) Answer the following
1.) Define coal, its formation and uses.
Ans :i) Coal is one of the fuel which is used in cooking railway engine to produce steam, in thermal plants to produce electricity.
ii) Formation of coal
- coal is formed from the remains of vegetation.
- Due to natural process the forests get buried under the soil and got compressed.
- Due to the change in temperature dead plants got converted into a fossil called coal.
Q.4.) Fill in the blanks
- The slow process of conversion of dead vegetation into coal is called carbonisation.
- Coal gas is obtained during the processing of coal to get coke.
- petroleum is a mixture of gas ,petrol and diesel.
- CNG is used for power generation.
- CNG gas pipeline supply network is located at vadodara in Gujarat.
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