O-LevelChemistryChemistry of the Environment5070/12 · Oct/Nov 2017 · Q351 Mark

Why is chlorine added to the water supply?

AChlorine is used to desalinate the water.

BChlorine kills bacteria that may be present in the water.

CChlorine precipitates solids that may be present in the water.

DChlorine removes tastes and odours from the water.

✓ Correct answer

B: Chlorine kills bacteria that may be present in the water.

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 2, question 35.

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