Which statement about the members of the alkane homologous series is correct?
Their ease of ignition increases as the molecules get larger
Neighbouring compounds in the series differ in molecular formula by CH2\text{CH}_2CH2
They have completely different chemical reactions from one another
Their volatility increases as the carbon chain length increases
130 exam-style questions on Edexcel GCSE Chemistry 9.1 Fuels, covering 9.1.1 Hydrocarbons and crude oil, 9.1.2 Fractional distillation of crude oil and its fractions, 9.1.3 The alkanes as a homologous series, 9.1.4 Complete and incomplete combustion, 9.1.5 Pollutants from burning fuels, 9.1.6 Hydrogen as a fuel and non-renewable fossil fuels, and 9.1.7 Cracking of larger alkanes. Each one has a worked solution and a mark scheme showing where the marks go.