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7.2 Group 7

7.2 Group 7

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Question 15

A student investigates the reactivity and physical properties of the halogens by carrying out two separate displacement experiments.

In Experiment 1, chlorine water is added to an aqueous solution of potassium bromide. In Experiment 2, bromine water is added to an aqueous solution of potassium iodide.

Cyclohexane is then added to each reaction mixture, and the test tubes are thoroughly shaken and allowed to separate into two layers.

Which of the following options correctly describes the final colour of the upper organic (cyclohexane) layer in each experiment?

A

Experiment 1: pale green; Experiment 2: brown

B

Experiment 1: orange; Experiment 2: purple

C

Experiment 1: orange; Experiment 2: brown

D

Experiment 1: pale green; Experiment 2: purple

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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