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Objective Questions:

1. The energy generated by biomass is

a. solar energy.

b. biogas.

c. bioenergy.

d. wind energy.

2. Biogas is popularly known as

a. Gobar gas.

b. water gas.

c. producer gas.

d. coal gas.

3. Biogas is a better fuel than animal dung cakes because

a. the calorific value of biogas is much higher than that of animal dung cakes.

b. it is renewable source of energy.

c. it produces less smoke.

d. it can be manufactured instantly.

4. Geo-thermal energy is obtained from

a. plants on earth.

b. animals on earth.

c. water on the earth.

d. rocks inside the earth.

5. The major constituent of biogas is

(a) Methane