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5.3 Equilibria

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Question 35

Nitrosyl chloride undergoes a reversible reaction in a rigid vessel.

2NOCl(g)⇌2NO(g)+Cl2(g) \mathrm{2NOCl(g) \rightleftharpoons 2NO(g) + Cl_{2}(g)} 2NOCl(g)⇌2NO(g)+Cl2​(g)

The mixture is allowed to reach equilibrium. Extra chlorine gas is then pumped in and the vessel is closed again. The vessel is kept at the same temperature throughout.

Which statement describes the amounts of nitrosyl chloride and nitrogen monoxide once equilibrium is re-established, compared with before the chlorine was added?

[1]
A

Nitrosyl chloride: increased; nitrogen monoxide: decreased

B

Nitrosyl chloride: unchanged; nitrogen monoxide: unchanged

C

Nitrosyl chloride: increased; nitrogen monoxide: unchanged

D

Nitrosyl chloride: decreased; nitrogen monoxide: increased

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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