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GCSE Combined Science · key term
A mixture separated from crude oil that contains hydrocarbons with similar numbers of carbon atoms and similar boiling points.
Used by AQA and Edexcel
Specification 5.7.1.2 · Paper 4
Revise: Fractional DistillationSeparating every individual compound would be unnecessary for many uses. Instead, crude oil is separated into fractions. Each fraction is still a mixture, but its molecules have a similar number of carbon atoms and therefore similar boiling points.
Specification Fuels · Paper 3, Paper 4
A mixture of hydrocarbons with similar boiling points, collected during fractional distillation.
Revise: Crude oil, fractional distillation and crackingMethane is another non-renewable fossil fuel, but it is found in natural gas rather than obtained as one of these crude oil fractions.
A fraction is a mixture of hydrocarbons with similar numbers of carbon atoms, not a single pure compound.
Know the five named fuels and the four types of petrochemical product in this lesson. Names of other specific fractions or fuels are not required.
A fraction is a mixture of hydrocarbons with similar boiling points, not a single pure compound.
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