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7.2 Group 7

7.2 Group 7

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Question 13
H

Which ionic equation shows a reaction that actually takes place, with the species oxidised or reduced correctly identified?

[1]
A

I2+2Br−→2I−+Br2\mathrm{I_{2} + 2Br^{-} \rightarrow 2I^{-} + Br_{2}}I2​+2Br−→2I−+Br2​; bromide ions are oxidised

B

Cl2+2I−→2Cl−+I2\mathrm{Cl_{2} + 2I^{-} \rightarrow 2Cl^{-} + I_{2}}Cl2​+2I−→2Cl−+I2​; chlorine molecules are oxidised

C

Br2+2I−→2Br−+I2\mathrm{Br_{2} + 2I^{-} \rightarrow 2Br^{-} + I_{2}}Br2​+2I−→2Br−+I2​; iodide ions are oxidised

D

Br2+2Cl−→2Br−+Cl2\mathrm{Br_{2} + 2Cl^{-} \rightarrow 2Br^{-} + Cl_{2}}Br2​+2Cl−→2Br−+Cl2​; bromine molecules are reduced

Markscheme

7.2 Group 7 Questions

  1. GCSE
  2. /Chemistry
  3. /7.2 Group 7

106 exam-style questions on Edexcel GCSE Chemistry 7.2 Group 7, covering 7.2.1 Physical properties of the halogens, 7.2.2 Reactions of the halogens, 7.2.3 Relative reactivity and displacement reactions of the halogens, and 7.2.4 Halogen displacement as a redox reaction. Each one has a worked solution and a mark scheme showing where the marks go.

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