Which of the following gas is found in coal mines and marshy places?
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a
H2
b
CH4
c
Coal gas
d
Water gas
answer is B.
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Detailed Solution
Firedamp - Methane gas (CH4)Methane (CH4) is a colorless, odorless, highly flammable, and highly explosive noxious gas. It occurs naturally in coal seams and shale deposits and is a major component of the natural gas that we burn for energy.