Which of the following is a non-conventional source of energy?

The variety of coal with the highest carbon content is:

Distinguish between metallic and non-metallic minerals with two examples of each.

Distinguish between conventional and non-conventional sources of energy, with two examples of each.

Name the four varieties of coal in increasing order of carbon content and state which is the best.

Name two iron ore producing regions of India and state the variety of ore found.

State three advantages of using solar energy in India.