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8.2 Identification of common gases

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Question 12

A technician tests a gas sample with a glowing splint. The tip continues to glow but does not burst into flame.

Why should the technician not record this as a positive result for oxygen?

[1]
A

Oxygen is shown by the splint relighting; a splint keeps glowing in air too.

B

Oxygen is shown by a squeaky pop, which needs a burning splint instead.

C

Oxygen is shown by limewater turning milky, not by using a splint.

D

Oxygen is shown by the splint going out, not by it carrying on glowing.

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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