A-LevelChemistryElectrochemistry9701/12 · May/June 2015 · Q341 Mark

Which of these reactions are redox reactions? 1 6NO(g) + 4NH₃(g) → 5N₂(g) + 6H₂O(g) 2 2SO₂(g) + O₂(g) → 2SO₃(g) 3 SO₃(g) + H₂O(g) → H₂SO₄(g)

A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

B: 1 and 2 only are correct

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2015 Paper 1 Variant 2, question 34.

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