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9.2 Carbon dioxide and methane as greenhouse gases

9.2 Carbon dioxide and methane as greenhouse gases

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Question 3

A laboratory simulation of the atmospheric conditions on early Earth uses a gas mixture containing methane (CH4CH_4CH4​) and propene (C3H6C_3H_6C3​H6​).

a.

Explain how methane, a greenhouse gas, acts to keep the simulated planetary surface warmer than it would be without an atmosphere. You should refer to radiation and wavelengths in your answer.

[3]
b.

Explain how a researcher could chemically confirm that propene is an unsaturated hydrocarbon. State the reagent used and the observation that would confirm this.

[2]
Markscheme

9.2 Carbon dioxide and methane as greenhouse gases Questions

  1. GCSE
  2. /Chemistry
  3. /9.2 Carbon dioxide and methane as greenhouse gases

13 exam-style questions on AQA GCSE Chemistry 9.2 Carbon dioxide and methane as greenhouse gases, covering 9.2.1 Greenhouse gases, 9.2.2 Human activities which contribute to an increase in greenhouse gases in the atmosphere, 9.2.3 Global climate change, and 9.2.4 The carbon footprint and its reduction. Each one has a worked solution and a mark scheme showing where the marks go.

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