A refinery processes crude oil into different fractions. The table below shows the relative yield of four fractions obtained from a sample of crude oil alongside their relative industrial demand.
| Fraction | Relative yield obtained (%) | Relative demand (%) |
|---|---|---|
| Refinery gases | 2 | 6 |
| Petrol | 12 | 28 |
| Diesel | 23 | 30 |
| Lubricating oil | 52 | 8 |
State the fraction for which the relative yield obtained exceeds the relative demand.
105 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.