A-LevelChemistryElectrochemistry9701/12 · Oct/Nov 2013 · Q21 Mark

In which reaction does a single nitrogen atom have the greatest change in oxidation number?

A4NH3 + 5O2 → 4NO + 6H2O

B3NO2 + H2O → 2HNO3 + NO

C2NO + O2 → 2NO2

D4NH3 + 6NO → 5N2 + 6H2O

✓ Correct answer

A: 4NH3 + 5O2 → 4NO + 6H2O

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2013 Paper 1 Variant 2, question 2.

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