A-LevelChemistryNitrogen and sulfur9701/12 · Feb/Mar 2023 · Q11 Mark

Four equations representing reactions of nitrogen or one of its compounds are given. Which equation represents a disproportionation reaction?

A2HNO3 + CaCO3 → Ca(NO3)2 + CO2 + H2O

BN2 + 3H2 → 2NH3

CNH4Cl + NaOH → NH3 + NaCl + H2O

D2NO2 + H2O → HNO3 + HNO2

✓ Correct answer

D: 2NO2 + H2O → HNO3 + HNO2

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Topic: Nitrogen and sulfur, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2023 Paper 1 Variant 2, question 1.

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