Multiple choice general knowledge

Cowdung when dried emits which chemical

  1. CH4

  2. C2H4

  3. CH3

  4. 2CH3
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A Correct answer
Explanation

Dried cow dung emits methane (CH4), the simplest alkane. This is because cow dung contains organic matter that undergoes anaerobic decomposition, producing methane gas. C2H4 is ethylene, CH3 is a methyl radical (not a stable molecule), and 2CH3 is not a valid chemical formula. Methane is a major greenhouse gas.

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