A-LevelChemistryEquilibria9701/12 · Oct/Nov 2019 · Q101 Mark

The decomposition of SO₃(g) is a dynamic equilibrium. 2SO₃(g) ⇌ 2SO₂(g) + O₂(g) What happens when the pressure of the system is increased?

AThe rate of reaction will decrease and the position of the equilibrium will move to the left.

BThe rate of reaction will decrease and the position of the equilibrium will move to the right.

CThe rate of reaction will increase and the position of the equilibrium will move to the left.

DThe rate of reaction will increase and the position of the equilibrium will move to the right.

✓ Correct answer

C: The rate of reaction will increase and the position of the equilibrium will move to the left.

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Topic: Equilibria, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 2, question 10.

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