Crude oil is found in rocks under the ground and under the sea. It is a complex mixture of hydrocarbons.
The table shows the formulae of five substances.
| Substance | Formula |
|---|---|
| A | C5H12\mathrm{C_{5}H_{12}}C5H12 |
| B | C2H5OH\mathrm{C_{2}H_{5}OH}C2H5OH |
| C | C6H6\mathrm{C_{6}H_{6}}C6H6 |
| D | CO2\mathrm{CO_{2}}CO2 |
| E | C8H16\mathrm{C_{8}H_{16}}C8H16 |
State what is meant by a hydrocarbon.
Give the letters of two substances in the table that are hydrocarbons.
Describe how the carbon atoms are arranged in the hydrocarbon molecules found in crude oil.
Crude oil is an important source of fuels. Give one other use of crude oil.
State why crude oil is described as a finite resource.
37 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.