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A-LevelChemistryEquilibria9701/12 · May/June 2023 · Q131 Mark

In which equilibrium will an increase in pressure at constant temperature increase the yield of the products on the right-hand side of the equation?

ACaCO₃(s) ⇌ CaO(s) + CO₂(g)
B4HCl(g) + O₂(g) ⇌ 2H₂O(g) + 2Cl₂(g)
C2HI(g) ⇌ H₂(g) + I₂(g)
D3Fe(s) + 4H₂O(g) ⇌ Fe₃O₄(s) + 4H₂(g)

✓ Correct answer

B: 4HCl(g) + O₂(g) ⇌ 2H₂O(g) + 2Cl₂(g)

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About this question

Topic
Equilibria, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source
A-Level Chemistry, May/June 2023 Paper 1 Variant 2, question 13.

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