O-LevelChemistryChemistry of the Environment5070/11 · Oct/Nov 2018 · Q321 Mark

Pollutant gases are released by the bacterial decay of vegetable matter. The bacterial decay of vegetable matter is the main source of which gas?

Acarbon monoxide

Bmethane

Cnitrogen dioxide

Dsulfur dioxide

✓ Correct answer

B: methane

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2018 Paper 1 Variant 1, question 32.

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