A-LevelChemistryNitrogen and sulfur9701/12 · May/June 2022 · Q251 Mark

Solid R is added to a solution of ammonium nitrate and the mixture is heated. A gas is given off which turns red litmus to blue. What could be R?

Aaluminium chloride

Bmagnesium chloride

Csodium oxide

Dphosphorus oxide

✓ Correct answer

C: sodium oxide

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Topic: Nitrogen and sulfur, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2022 Paper 1 Variant 2, question 25.

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