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9.1 The composition and evolution of the Earth's atmosphere

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Question 12
F

Which pair of gases may have been present in small proportions in the Earth's early atmosphere?

[1]
A

Chlorine and helium

B

Hydrogen and helium

C

Methane and ammonia

D

Methane and chlorine

Markscheme

9.1 The composition and evolution of the Earth's atmosphere Questions

  1. GCSE
  2. /Chemistry
  3. /9.1 The composition and evolution of the Earth's atmosphere

40 exam-style questions on AQA GCSE Chemistry 9.1 The composition and evolution of the Earth's atmosphere, covering 9.1.1 The proportions of different gases in the atmosphere, 9.1.2 The Earth's early atmosphere, 9.1.3 How oxygen increased, and 9.1.4 How carbon dioxide decreased. Each one has a worked solution and a mark scheme showing where the marks go.

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