O-LevelChemistryRates of Reaction5070/11 · May/June 2025 · Q191 Mark

Which row shows the typical conditions used for the conversion of sulfur dioxide to sulfur trioxide in the Contact process?

Airon | 20000

Biron | 200

Cvanadium(V) oxide | 20000

Dvanadium(V) oxide | 200

✓ Correct answer

D: vanadium(V) oxide | 200

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2025 Paper 1 Variant 1, question 19.

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