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7.2 Group 7

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Question 12
H

Which half equation represents oxidation of iodide ions?

[1]
A

I2+2e−→2I−\mathrm{I_2+2e^-\rightarrow2I^-}I2​+2e−→2I−

B

I−+e−→I2−\mathrm{I^-+e^-\rightarrow I^{2-}}I−+e−→I2−

C

2I−→I2+2e−\mathrm{2I^-\rightarrow I_2+2e^-}2I−→I2​+2e−

D

I2→2I++2e−\mathrm{I_2\rightarrow2I^++2e^-}I2​→2I++2e−

Markscheme

7.2 Group 7 Questions

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

41 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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