Chemistry · Oct / Nov 2025 · Paper 12 · Question 28
5070Water
Water may contain many substances before it is purified for drinking. Three substances are listed. 1 dissolved oxygen 2 harmful microbes 3 insoluble solids Which substances are removed by the treatment of the domestic water supply?
- A1 and 2
- B1 and 3
- C2 and 3
- D3 only
As printed in the paper
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Correct answer: C. 2 and 3
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