O-LevelChemistryChemistry of the Environment5070/11 · Oct/Nov 2019 · Q301 Mark

Methane and sulfur dioxide are two air pollutants found in the Earth's atmosphere. Which row correctly identifies one source of each gas?

Aone source of methane: decaying plants, one source of sulfur dioxide: photochemical reactions

Bone source of methane: decaying plants, one source of sulfur dioxide: volcanoes

Cone source of methane: lightning activity, one source of sulfur dioxide: photochemical reactions

Done source of methane: lightning activity, one source of sulfur dioxide: volcanoes

✓ Correct answer

B: one source of methane: decaying plants, one source of sulfur dioxide: volcanoes

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 1, question 30.

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