Question

Choose the incorrect statement

विकल्प

• We are encouraged to plant more trees so as to ensure clean environment and also provide bio-mass fuel

• Gobar-gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen

• The main ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash

• Bio-mass is a renewable source of energy

Answer 1

The main ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash

Explanation - 

The main constituent of biogas is not ethane. The main constituent of biogas is methane. It constitute 75% of the biogas.