The table shows the boiling point range of three fuels. Fuels with a higher boiling point range contain larger molecules. What is the order of the three fuels, from the least flammable to the most flammable?
Table: The boiling point range of three fuels obtained from crude oil
| Fuel | Boiling point range in ∘C^\circ\text{C}∘C |
|---|---|
| P | 25 to 70 |
| Q | 175 to 250 |
| R | 300 to 400 |
P, Q, R
R, Q, P
Q, R, P
R, P, Q
40 exam-style questions on AQA GCSE Chemistry 7.1 Carbon compounds as fuels and feedstock, covering 7.1.1 Crude oil, hydrocarbons and alkanes, 7.1.2 Fractional distillation and petrochemicals, 7.1.3 Properties of hydrocarbons, and 7.1.4 Cracking and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.