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8.2 Identification of common gases

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Question 20

A sealed sampling bag is labelled oxygen. The gas in the bag is known to be hydrogen, oxygen, carbon dioxide or chlorine.

An analyst passes a small sample of the gas over damp litmus paper. The paper is not bleached white.

The analyst concludes that the label on the bag is correct.

Give one reason why the analyst's conclusion is not justified.

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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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