Question

Marsh gas mainly contains (a) C₂H₂ (b) CH₄(c) H₂S (d) CO

Answer 1

Marsh gas contains mainly methane, carbon dioxide, and excess nitrogen. Though there are other minor components like hydrogen, ethane, propane, and hydrogen sulfide.  

Hence, marsh gas mainly contains methane, CH₄.

The correct answer is (b) CH₄

Answer 2

(b) CH₄

Explanation:

• Marsh gas is also known as bio gas which is formed by the decay and decomposition of the living material like plants and herbivore animals.
• In the presence of water or wet lands, the anaerobic bacteria feed on these material for their survival and produce gases like methane, hydrogen sulfide and the carbon dioxide.
• Since methane is present in the highest amount ranging from 60-80 percent in marsh gas therefore marsh gas is also known as methane gas.
• The marsh gas is odourless and can be flames easily.
• Thus, Option-B is the correct answer.

To learn more:

1.  Marsh gas: https://brainly.in/question/1123730