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