Hydel power is a

1. renewable resource
2. non-renewable resource
3. exhaustible resource
4. very expensive

Multipurpose projects were installed by Pandit Jawaharlal Nehru to

1. supply water to cities and for power generation
2. for navigation
3. for economic development
4. to avoid silting in the river

The main raw materials for generation of atomic energy

1. uranium and plutonium
2. coal and non-ore
3. manganese and copper
4. copper and bauxite

Solar energy is

1. in-exhaustible
2. non-renewable
3. non affordable
4. more useful in temperate zone