Hydrocarbons: Fuel & Feedstock (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes

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Fractional Distillation & Petrochemicals
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What property is used to separate crude oil in fractional distillation?

Boiling points

What is crude oil?

A complex mixture of hydrocarbons

Why is crude oil not very useful in its raw state?

It contains hydrocarbons with varying properties

What are fractions in fractional distillation?

Simpler mixtures with similar chain lengths

Where is the fractionating column hottest?

At the bottom

Where do hydrocarbons with higher boiling points condense?

Lower in the column

What happens to hydrocarbons with lower boiling points in the column?

Continue to rise higher up

How does crude oil enter the fractionating column?

Heated and enters at the bottom

What are petrochemicals?

Substances we get from crude oil

Which is a product made from petrochemicals?

Polymers

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