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7.2 Group 7

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Question 11
H

When 7.0 g of gallium is heated in iodine vapour, 45.1 g of gallium iodide is formed. No other product forms.

What is the formula of gallium iodide?

(relative atomic masses: Ga = 70, I = 127)

[1]
A

Ga2I3\mathrm{Ga_{2}I_{3}}Ga2​I3​

B

GaI3\mathrm{GaI_{3}}GaI3​

C

Ga3I\mathrm{Ga_{3}I}Ga3​I

D

GaI6\mathrm{GaI_{6}}GaI6​

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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