A student makes three statements about the alkanes.
(relative atomic masses: C = 12, H = 1)
Statement 1: a molecule of butane, C4H10\mathrm{C_{4}H_{10}}C4H10, contains 13 covalent bonds
Statement 2: the relative formula masses of consecutive alkanes differ by 14
Statement 3: the alkane with 10 carbon atoms has the formula C10H20\mathrm{C_{10}H_{20}}C10H20
Which statements are correct?
1 and 2 only
2 only
2 and 3 only
1, 2 and 3
36 exam-style questions on Edexcel GCSE Chemistry 10.2 Hydrocarbons, covering 10.2.1 Formulae and structures of the alkanes, 10.2.2 Alkenes and the C=C functional group, 10.2.3 Addition reactions of alkenes and testing for unsaturation, and 10.2.4 Combustion of alkanes and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.