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Q. Biogas produced by fermentation of manure, sewage, cattle dung, etc predominantly comprises

Delhi UMET/DPMTDelhi UMET/DPMT 2010

A

methane, nitrogen and hydrogen

B

methane and carbon dioxide

C

methane and carbon monoxide

D

methane and nitric oxide

Solution:

Biogas typically refers to a gas produced by the biological breakdown of organic matter in the absence of oxygen. The typical composition of biogas given below

Compound Percentage

Methane 50-75

Carbon dioxide 25-50

Nitrogen 0-10

Hydrogen 0-1

Hydrogen sulphide 0-3

Oxygen 0-2