Tetradecane is cracked. The equation shows the products.
C14H30→2C3H6+C2H4+X\mathrm{C_{14}H_{30} \rightarrow 2C_{3}H_{6} + C_{2}H_{4} + X}C14H30→2C3H6+C2H4+X
What is the formula of X?
C9H20\mathrm{C_{9}H_{20}}C9H20
C8H18\mathrm{C_{8}H_{18}}C8H18
C6H14\mathrm{C_{6}H_{14}}C6H14
C6H12\mathrm{C_{6}H_{12}}C6H12
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.