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Paper 2 H - SAMPLE SET 1 Q20 Answers

20) Poly(propenenitrile) is an addition polymer.
​Look at the flow chart. It shows how poly(propenenitrile) is made from crude oil.
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(a) Crude oil is a complex mixture of hydrocarbons.
Fractional distillation separates this mixture.
Explain, in terms of intermolecular forces, fractional distillation. [2]

​(b) Look at the displayed formula for propenenitrile.
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Propenenitrile is an unsaturated compound.
How you can tell from the displayed formula? [1]

(​Total for Question 20 = 3 marks)

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