In a water treatment plant in Singapore, chlorine is added to drinking water. Which statement correctly explains why chlorine is used?

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Question

In a water treatment plant in Singapore, chlorine is added to drinking water. Which statement correctly explains why chlorine is used?

Accepted Answer

Chlorine kills bacteria and other microorganisms — Award 1 mark for identifying the role of chlorine as a disinfectant. A is incorrect — ion exchange or lime softening removes calcium ions. C is incorrect — neutralisation requires alkalis, not chlorine. D is incorrect — filtration removes suspended particles.

Answer

Chlorine removes dissolved calcium ions

Answer

Chlorine neutralises acidic water

Answer

Chlorine removes suspended particles

Answer

Chlorine kills bacteria and other microorganisms

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