Q.

Biogas majorly contains -

A. Ethane
B. Methane
C. Hydrogen
D. CO
Answer» B. Methane
Explanation: Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O) , hydrogen sulfide (H2S) etc.
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