Which is the correct general formula for non-cyclic compounds in the homologous series?
carboxylic acids — CnH2nO2\text{C}_n\text{H}_{2n}\text{O}_2CnH2nO2
ketones — CnH2n+2O\text{C}_n\text{H}_{2n+2}\text{O}CnH2n+2O
monohaloalkanes — CnH2nX\text{C}_n\text{H}_{2n}\text{X}CnH2nX (where X\text{X}X is a halogen)
alkynes — CnH2n\text{C}_n\text{H}_{2n}CnH2n
21 exam-style questions on AQA A Level Chemistry Introduction to organic chemistry, covering Nomenclature, Reaction mechanisms, and Isomerism. Each one has a worked solution and a mark scheme showing where the marks go.