A bottle is labelled pentene. Which molecular formula matches this alkene?
C5H10\text{C}_5\text{H}_{10}C5H10
C4H8\text{C}_4\text{H}_8C4H8
C5H12\text{C}_5\text{H}_{12}C5H12
C6H12\text{C}_6\text{H}_{12}C6H12
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.