Gasoline (petrol)
4 marks · NormalGasoline (petrol) is an important fraction produced from crude oil.
State what gasoline (petrol) mainly consists of.
Give two different uses of gasoline.
Explain why gasoline is suitable for its main use in vehicles.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) A mixture of hydrocarbons with similar boiling points.
(b) Fuel for cars (petrol engines); can be used as fuel for small machines or lawn mowers.
(c) It is easily ignited and burns smoothly in car engines, providing energy for movement.
Common mistakes: confusing with refinery gases
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · States gasoline is a mixture of hydrocarbons (with similar boiling points).
B2 (b) · 1 mark · States gasoline is used as a fuel for cars (petrol engines).
B3 (b) · 1 mark · States another valid use (such as small machinery, lawn mowers, or motorbikes).
B4 (c) · 1 mark · Explains why gasoline is suitable: easily ignited and burns smoothly in engines, providing energy.
Worked solution
a) Gasoline (petrol) mainly consists of a mixture of hydrocarbons with similar boiling points.
b) Gasoline is used as a fuel for cars and as a fuel for some small engines such as lawn mowers.
c) Gasoline is suitable because it is easily ignited and burns smoothly in combustion engines, releasing energy for movement.