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Chemistry · May / June 2018 · Paper 12 · Question 3

5070Identification of ions and gases

Which row gives the correct tests to identify both ammonia and sulfur dioxide?

  1. Adamp blue litmus paper; acidified potassium manganate(VII)
  2. Bdamp blue litmus paper; damp red litmus paper
  3. Cdamp red litmus paper; acidified potassium manganate(VII)
  4. Ddamp red litmus paper; damp blue litmus paper

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Correct answer: C. damp red litmus paper; acidified potassium manganate(VII)

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