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Chemistry · Oct / Nov 2023 · Paper 11 · Question 20

5070The characteristic properties of acids and bases

Limewater is aqueous calcium hydroxide. Which statement about limewater is correct?

  1. AIt has a pH below 7.
  2. BIt gives a blue-green colour in the flame test.
  3. CIt reacts with ammonia to form an ammonium salt.
  4. DIt turns yellow when methyl orange is added.

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Correct answer: D. It turns yellow when methyl orange is added.

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