O-LevelChemistryRates of Reaction5070/11 · May/June 2010 · Q291 Mark

These reactions are used in the manufacture of sulfuric acid. P S + O2 → SO2 Q 2SO2 + O2 ⇌ 2SO3 R SO3 + H2O → H2SO4 Which reactions are speeded up by using a catalyst?

AP only

BQ only

CR only

DQ and R

✓ Correct answer

B: Q only

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2010 Paper 1 Variant 1, question 29.

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