O-LevelChemistryChemistry of the Environment5070/11 · Oct/Nov 2022 · Q351 Mark

Carbon is used in the purification of the water supply. What is the reason for this?

Ato remove mud and other insoluble solids

Bto remove nitrates caused by the excessive use of fertiliser

Cto remove tastes and odours

Dto sterilise the water by removing harmful bacteria

✓ Correct answer

C: to remove tastes and odours

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2022 Paper 1 Variant 1, question 35.

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