Which structural formula represents propene?
CH3CH2CH3\text{CH}_3\text{CH}_2\text{CH}_3CH3CH2CH3
CH3CH2CH2OH\text{CH}_3\text{CH}_2\text{CH}_2\text{OH}CH3CH2CH2OH
CH2=CHCH2CH3\text{CH}_2\text{=CHCH}_2\text{CH}_3CH2=CHCH2CH3
CH3CH=CH2\text{CH}_3\text{CH=CH}_2CH3CH=CH2
40 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.