Methanol, ethanol, and propan-1-ol are investigated as sustainable alternative biofuels to mitigate global carbon emissions. Why are these compounds classified as members of the same homologous series?
They have the same empirical formula and identical chemical reactivities in all oxidation reactions.
They are structural isomers of each other with the general formula CnH2n+2O\text{C}_n\text{H}_{2n+2}\text{O}CnH2n+2O, resulting in identical physical properties.
Their successive members differ by a −CH3−-\text{CH}_3-−CH3− group, but they share a common functional group and general formula.
They possess the same functional group, show a gradual trend in physical properties, and can be represented by the same general formula.
83 exam-style questions on OCR GCSE Chemistry Organic chemistry. Each one has a worked solution and a mark scheme showing where the marks go.