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5.3 Equilibria

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Question 37

Ammonium chloride is heated at the bottom of a long test tube.

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

A white solid forms near the cool top of the test tube.

Statement 1: The white solid near the top of the test tube forms by the forward reaction.

Statement 2: The forward reaction is endothermic.

Statement 3: Lowering the temperature favours the formation of ammonium chloride.

Which statements are correct?

[1]
A

1 and 3 only

B

2 and 3 only

C

2 only

D

1 only

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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