The table shows the supply of each fraction from crude oil at a refinery and the demand for each fraction.
| Fraction | Supply / % | Demand / % |
|---|---|---|
| gases | 4 | 5 |
| petrol | 12 | 28 |
| kerosene | 11 | 12 |
| diesel oil | 21 | 25 |
| fuel oil and bitumen | 52 | 30 |
Which conclusion is best supported by the data?
Fuel oil should be cracked, as supply exceeds demand and cracking gives smaller molecules
Petrol should be cracked, as its demand is much greater than its supply from crude oil
Diesel oil should be cracked, as it has the largest shortfall of any liquid fuel fraction
Fuel oil should be distilled again, as this splits its long molecules into petrol-sized ones
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.