Crude oil is a complex mixture of hydrocarbons that is separated into useful fractions via fractional distillation. Due to varying economic and industrial needs, the natural yield of each fraction does not always align with commercial demand.
The table below shows the percentage yield of each fraction obtained from a specific crude oil assay alongside its current global market demand:
| Hydrocarbon fraction | Yield from crude oil (%) | Global market demand (%) |
|---|---|---|
| Refinery gases | 3 | 7 |
| Petrol / Gasoline | 11 | 29 |
| Naphtha | 9 | 14 |
| Kerosene | 13 | 11 |
| Diesel / Gas oil | 20 | 26 |
| Fuel oil / Residue | 44 | 13 |
Which of the following options lists only the fractions that are produced in surplus (where the percentage yield exceeds the global market demand)?
Petrol / Gasoline, Naphtha, Diesel / Gas oil
Kerosene, Fuel oil / Residue
Refinery gases, Petrol / Gasoline, Naphtha
Naphtha, Kerosene, Fuel oil / Residue
Practise Edexcel GCSE Chemistry Fuels with exam-style questions for Foundation and Higher tier. 105 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
