O-LevelChemistryChemistry of the Environment5070/11 · Oct/Nov 2024 · Q281 Mark

The domestic water supply is treated to make it safe to drink. Which row identifies the treatment and its effect?

Achlorination: removes nitrates, filtration: removes solids, sedimentation: removes nitrates

Bchlorination: kills microbes, filtration: removes soluble compounds, sedimentation: removes solids

Cchlorination: removes solids, filtration: kills microbes, sedimentation: removes soluble compounds

Dchlorination: kills microbes, filtration: removes solids, sedimentation: removes solids

✓ Correct answer

D: chlorination: kills microbes, filtration: removes solids, sedimentation: removes solids

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2024 Paper 1 Variant 1, question 28.

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