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Chemistry · Oct / Nov 2018 · Paper 12 · Question 33

5070Water

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

  1. Afiltration: harmful microbes; use of carbon: solids; chlorination: unpleasant odours and tastes
  2. Bfiltration: harmful microbes; use of carbon: unpleasant odours and tastes; chlorination: solids
  3. Cfiltration: solids; use of carbon: harmful microbes; chlorination: unpleasant odours and tastes
  4. Dfiltration: solids; use of carbon: unpleasant odours and tastes; chlorination: harmful microbes

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

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