The table shows the percentage of each fraction supplied by crude oil and the percentage that customers demand.
| Fraction | Percentage supplied (%) | Percentage demanded (%) |
|---|---|---|
| LPG | 3 | 4 |
| Petrol | 12 | 25 |
| Kerosene | 11 | 12 |
| Diesel | 22 | 24 |
| Heavy fuel oil | 38 | 12 |
A refinery wants to make more petrol by cracking.
Which fraction is the most suitable to crack?
Heavy fuel oil
LPG
Petrol
Kerosene
63 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.