Multiple choice general knowledge

Marsh gas is

  1. nitrogen

  2. ethane

  3. methane

  4. hydrogen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Marsh gas is methane (CH4), named because it bubbles up from marshes and swamps where anaerobic bacteria decompose organic matter. It's the simplest alkane and major component of natural gas (70-90%). Methane is colorless, odorless (though commercial gas has added scent), and highly flammable - this characteristic 'will-o'-the-wisp' phenomenon inspired folklore.

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