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7.2 Reactions of alkenes and alcohols

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Question 27

A technician burns ethene and ethane separately in the same burner, using the same air supply. Their molecular formulae are shown in the table.

FuelMolecular formula
EtheneC2H4\text{C}_2\text{H}_4C2​H4​
EthaneC2H6\text{C}_2\text{H}_6C2​H6​

Explain why ethene is expected to produce a smokier flame than ethane.

[2]
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7.2 Reactions of alkenes and alcohols Questions

  1. GCSE
  2. /Chemistry
  3. /7.2 Reactions of alkenes and alcohols

97 exam-style questions on AQA GCSE Chemistry 7.2 Reactions of alkenes and alcohols, covering 7.2.1 Structure and formulae of alkenes, 7.2.2 Reactions of alkenes, 7.2.3 Alcohols, 7.2.4a Carboxylic acids, and 7.2.4b Carboxylic acids as weak acids. Each one has a worked solution and a mark scheme showing where the marks go.

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