O-LevelChemistryAcids, Bases & Salts5070/12 · May/June 2018 · Q31 Mark

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

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Adamp blue litmus paper, acidified potassium manganate(VII)

Bdamp blue litmus paper, damp red litmus paper

Cdamp red litmus paper, acidified potassium manganate(VII)

Ddamp red litmus paper, damp blue litmus paper

✓ Correct answer

C: damp red litmus paper, acidified potassium manganate(VII)

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2018 Paper 1 Variant 2, question 3.

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