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Basic chemistry (common gases): Marsh gas is chemically identified as which simple hydrocarbon? Identify the gas produced in anaerobic swamps and biogas plants. Choose the correct gas.

Difficulty: Easy

Methane (CH4)
Ethane (C2H6)
Propane (C3H8)
Butane (C4H10)

Correct Answer: Methane (CH4)

Explanation:

What is being asked?
The chemical identity of "marsh gas".

Given data

Natural setting: marshes, swamps, biogas

Concept/Approach
Marsh gas is predominantly methane (CH₄), produced by methanogenic bacteria under anaerobic conditions.

Final Answer
Methane (CH₄)

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