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Chemistry · Oct / Nov 2019 · Paper 11 · Question 31

5070Water

The water supply can be purified by filtration and chlorination. Which substance remains in the water supply after these treatments?

  1. Afine sand
  2. Bharmful microbes
  3. Cmineral salts
  4. Dsolid organic matter

As printed in the paper

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Correct answer: C. mineral salts

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