1. Choose the incorrect statement
(a) We are encouraged to plant more trees so as to ensure clean environment and also provide bio-mass fuel
(b) Gobar-gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen
(c) 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

Question

1.	Choose the incorrect statement
(a)	We are encouraged to plant more trees so as to ensure clean environment and also provide bio-mass fuel
(b)	Gobar-gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen
(c)	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

Accepted Answer

Soln:

Answer is (c) The main ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash
Explanation:
Main product of a biogas is methane. It burns with less smoke and did not produce residual ash.

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