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8.2 Identification of common gases

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Question 6

A student holds a piece of dry blue litmus paper in a sample of gas. The paper does not change colour. Which reason explains why this result does not show that the gas is free of chlorine?

[1]
A

Chlorine must dissolve in water before it can bleach the litmus paper.

B

Chlorine is shown by litmus paper turning red, so no bleaching is expected.

C

Chlorine must be bubbled through the paper several times before it acts.

D

Chlorine only bleaches red litmus paper, so blue litmus paper stays blue.

Markscheme

8.2 Identification of common gases Questions

  1. GCSE
  2. /Chemistry
  3. /8.2 Identification of common gases

89 exam-style questions on AQA GCSE Chemistry 8.2 Identification of common gases, covering 8.2.1 Test for hydrogen, 8.2.2 Test for oxygen, 8.2.3 Test for carbon dioxide, and 8.2.4 Test for chlorine. Each one has a worked solution and a mark scheme showing where the marks go.

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