What are the different techniques used for mineral extraction?

4

(a)

What are the different types of minerals? Explain them briefly.

4

(a)

Distinguish between Anthracite and Bituminous Coal.

4

(a)

Classify the power resources briefly.

4

(a)

Write down the advantages and disadvantages of coal.

4

(a)

Write down some advantages of biogas.

4

(a)

What are non-conventional sources of energy ? Why there is a pressing need to use these resources of energy?

4

(a)

What do you understand by solar energy? Write down its importance.

4

(a)

Answer the following briefly:
(a) Two minerals which you use every day.
(b) Two regions rich in natural gas resources.

4

(a)

Explain briefly that how can we use organic waste to generate energy ?

4

(a)