Which statement about petroleum is NOT correct?
A It can be separated into useful substances by fractional distillation.
B It consists mainly of hydrocarbons.
C It is found underground in many parts of the world.
D Its main use is for making lubricants and polishes.
The diagram shows an industrial process. Substance M is one of the substances produced by this process and is used as aircraft fuel.
What is this process and what is substance M?
A
B
C
D
In an oil refinery, crude oil is separated into useful fractions.
The diagram shows some of these fractions.
What are fractions X, Y and Z?
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