A-LevelChemistryEquilibria9701/12 · Oct/Nov 2025 · Q131 Mark

In the Contact process, sulfur dioxide and oxygen react to form sulfur trioxide. In the Haber process, nitrogen and hydrogen react to form ammonia. Which statement about these processes is correct?

AKp for the Haber process has no unit.

BIn the Contact process, the value of Kp falls when pressure is increased at constant T.

CThe Haber process uses a homogeneous catalyst.

DWhen V2O5 is used in the Contact process, the position of equilibrium is unchanged.

✓ Correct answer

D: When V2O5 is used in the Contact process, the position of equilibrium is unchanged.

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Topic: Equilibria, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2025 Paper 1 Variant 2, question 13.

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