Class 8 Science Chapter-6 Sources of Energy DAV/CBSE Book Solution 2021

Class 8 Science Chapter-6 Sources of Energy DAV/CBSE Book Solution 2021

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Class 8 Science Chapter 6 : Sources Of Energy 

This Post Contains All The Exercises of Chapter 6 Science Of Class 8.

• A.Fill In The Blanks.

• B.State true or false for the following statements

• C.Tick(√) The Correct Option

• D.Answer The Following Questions in Brief 

• E.Answer The Following Questions
• Value Based Question
• Something To Do

A. Fill in the blanks (Class 8 Ch-6 Science DAV Book)

1. Coal And petroleum are non-renewable sources of energy.

2. Solar energy is a major renewable, natural resource.

3. The process, in which coal is strongly heated in the absence of air, is known as destructive distillation.

4. In oil wells, natural gas is always found above the layer of petroleum.

5. Coal tar is a black viscous liquid, obtained by destructive distillation of coal.

B. State true or false for the following statements (Class 8 Ch-6 Science DAV Book)

1. Fossil fuels are renewable natural resources.

Ans- False

2. Anthracite has higher carbon content than lignite.

Ans- True

3. Coke can be used to make fuel gases.

Ans- True

4. Natural gas is found below the petroleum layers.

Ans- False

5. Burning of fossil fuels is a major source of pollution.

Ans- True

C. Tick the correct option (Class 8 Ch-6 Science DAV Book)

1. The highest grade of coal is known as----

Ans- Anthracite

2. Coke and coal tar are obtained from----

Ans- Coal

3. Different type of coal generally have the----

Ans- Different content of volatile material as well as different percentage of carbon.

4. A product, that is not obtained through the refining of petroleum is----

Ans-  Coal gas

5. Which of the following is a renewable source of energy?

Ans- Tidal energy

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