Which functional group is present in every alkene molecule?
A carbon-carbon single bond, C-C\text{C-C}C-C
A carbon-carbon double bond, C=C\text{C=C}C=C
A hydroxyl group, -OH\text{-OH}-OH
A carboxyl group, -COOH\text{-COOH}-COOH
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.