What does CNG stand for and why is it considered to be a better fuel than petrol

2

(a)

Give two natural resources. Why these are called natural resources.

2

(a)

Where was the first oil well drilled in India?

2

(a)

Petroleum is called black gold. Why?

2

(a)

How can you define coke?

2

(a)

Coal, petroleum and natural gas are called fossil fuels. Why?

2

(a)

What do you mean by carbonisation?

2

(a)

We use all our natural resources forever. Can it be possible?

2

(a)

Name the petroleum product used as fuel for stoves, lamps and jet aircrafts

2

(a)

Name the process by which various compounds  present in coal tar are separated.

2

(a)

Where coal is found in India?

2

(a)

Which gas is used as a starting material for the manufacture of a number of chemicals and fertilisers and why?

2

(a)

What is the full form of CNG and LPG?

2

(a)

Write different uses of coal-tar.

2

(a)

What are the harmful effects of using fossil fuels?

2

(a)