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

3

(a)

Name the petroleum product used for surfacing of roads.

3

(a)

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

3

(a)

Explain why fossil fuels are exhaustible natural resources.

3

(a)

Sunlight and air are inexhaustible natural resources. Comment.

3

(a)

Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources. Air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen.

3

(a)

Write the various fractions of petroleum

3

(a)

Write the difference between coke and coal

3

(a)

What are the disadvantages of using fossil fuels?

3

(a)

You are provided with a mixture of petroleum and water. Can you suggest a method to separate the two?

3

(a)

Where do we get coal from and how is it formed?

3

(a)

Write the characteristics and some important uses of coal.

3

(a)

List various constituents of petroleum and their uses.

3

(a)

In a village people burn wood and cow dung as a fuel for basic necessity. In other nearby village they have a big biogas plant in which bio-waste is used to prepare biogas. If we compare the situation of both villages, which practice will you prefer as the best and why?

3

(a)

Conserving energy has become the need of the society and nature, be it in the transport, household or industries. Energy conservation has been recognized as a national issue for a long time. As a responsible citizen of India, what steps would you take to conserve energy?

3

(a)