O-LevelChemistryChemistry of the Environment5070/12 · Oct/Nov 2018 · Q331 Mark

Several different treatments are used to purify the water supply. Which impurities can be removed by which treatment?

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Afiltration: harmful microbes; use of carbon: solids; chlorination: unpleasant odours and tastes

Bfiltration: harmful microbes; use of carbon: unpleasant odours and tastes; chlorination: solids

Cfiltration: solids; use of carbon: harmful microbes; chlorination: unpleasant odours and tastes

Dfiltration: solids; use of carbon: unpleasant odours and tastes; chlorination: harmful microbes

✓ Correct answer

D: filtration: solids; use of carbon: unpleasant odours and tastes; chlorination: harmful microbes

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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 2, question 33.

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