Which one of the following is the major constituent of biogas ?

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Carbon dioxide

Nitrous oxide

Methane

Oxygen

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This question was previously asked in

UPSC NDA-2 – 2019

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The correct option is C) Methane.

Biogas is a mixture of gases produced by the breakdown of organic matter in the absence of oxygen, primarily consisting of methane and carbon dioxide.

The typical composition of biogas is about 50-75% methane (CH4) and 25-50% carbon dioxide (CO2), with traces of other gases like hydrogen sulfide, nitrogen, and hydrogen. Methane is the primary combustible component that gives biogas its fuel value.

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