Which biogas is not produced by the decomposition of dung and dead plants?
(a) CH₄
(b) NH₃
(c) H₂S
(d) H₂
WBBSE
Class X
Life Science
05 (a) Nitrogen
01 Mark
2025
(d) H₂
Explanation:
Hydrogen gas (H₂) is not a typical component of biogas produced from the anaerobic decomposition of dung and plant materials. The principal gases in biogas are methane (CH₄), carbon dioxide (CO₂), with traces of ammonia (NH₃) and hydrogen sulfide (H₂S).
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