One molecule of nonane, C9H20\text{C}_9\text{H}_{20}C9H20, can be cracked to produce two molecules of ethene, C2H4\text{C}_2\text{H}_4C2H4, and one molecule of product Y.
C9H20→2C2H4+product Y \text{C}_9\text{H}_{20} \rightarrow 2\text{C}_2\text{H}_4 + \text{product Y} C9H20→2C2H4+product YWhat is the formula of product Y?
C5H10\text{C}_5\text{H}_{10}C5H10
C5H12\text{C}_5\text{H}_{12}C5H12
C7H14\text{C}_7\text{H}_{14}C7H14
C7H16\text{C}_7\text{H}_{16}C7H16
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.