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Chemistry · Oct / Nov 2023 · Paper 12 · Question 30

5070Water

Which statement about water is correct?

  1. ADistillation is used to remove insoluble impurities from the domestic water supply.
  2. BWater containing impurities turns anhydrous copper(II) sulfate blue.
  3. CWater containing impurities turns cobalt(II) chloride paper blue.
  4. DWater containing impurities boils at 100 °C.

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Correct answer: B. Water containing impurities turns anhydrous copper(II) sulfate blue.

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