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Chemistry · Oct / Nov 2021 · Paper 11 · Question 5

5070Identification of ions and gases

A compound X, when heated with an aqueous solution of compound Y, produces a gas that turns red litmus blue. 1 Y could be potassium hydroxide. 2 X is an acid. 3 X could be an ammonium salt. 4 X could be sodium nitrate. Which statements are correct?

  1. A1, 2 and 3
  2. B1 and 3 only
  3. C3 only
  4. D2 and 4

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Correct answer: B. 1 and 3 only

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