A-LevelChemistryNitrogen and sulfur9701/12 · May/June 2018 · Q191 Mark

Sulfur dioxide can be catalytically oxidised by an oxide of nitrogen in the atmosphere. Which reaction shows the regeneration of the catalyst?

AN2 + 2O2 ⇌ 2NO2

B4NH3 + 5O2 → 4NO + 6H2O

CN2 + O2 → 2NO

DNO + ½O2 → NO2

✓ Correct answer

D: NO + ½O2 → NO2

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Topic: Nitrogen and sulfur, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2018 Paper 1 Variant 2, question 19.

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