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5.3 Equilibria

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Question 38

Four reversible reactions are each at equilibrium in a separate sealed container. The pressure in each container is lowered and the temperature is kept the same.

For which reaction does the position of equilibrium shift towards the products?

[1]
A

N2(g)+O2(g)⇌2NO(g)\mathrm{N_{2}(g) + O_{2}(g) \rightleftharpoons 2NO(g)}N2​(g)+O2​(g)⇌2NO(g)

B

CO(g)+2H2(g)⇌CH3OH(g)\mathrm{CO(g) + 2H_{2}(g) \rightleftharpoons CH_{3}OH(g)}CO(g)+2H2​(g)⇌CH3​OH(g)

C

NH3(g)+HCl(g)⇌NH4Cl(s)\mathrm{NH_{3}(g) + HCl(g) \rightleftharpoons NH_{4}Cl(s)}NH3​(g)+HCl(g)⇌NH4​Cl(s)

D

CaCO3(s)⇌CaO(s)+CO2(g)\mathrm{CaCO_{3}(s) \rightleftharpoons CaO(s) + CO_{2}(g)}CaCO3​(s)⇌CaO(s)+CO2​(g)

Markscheme

5.3 Equilibria Questions

  1. GCSE
  2. /Chemistry
  3. /5.3 Equilibria

124 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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