CAIE A Level Chemistry 9701 · Polymerisation

Polymerisation: describe question

Describe7 marksChallenge

A sample of an addition polymer contains the following repeating units: −CHX2−CHX2−CHX2−CHCl−CHX2−CHX2−CHX2−CHClX−\ce{-CH2-CH2-CH2-CHCl-CH2-CH2-CH2-CHCl-}

(a) Identify the two monomers that were used to produce this polymer.

(b) Describe the mechanism of addition polymerisation, using one of these monomers as an example.

(c) State two difficulties associated with the disposal of poly(alkene)s, such as this polymer.

0 words · 7 marks

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How this question is marked

7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.

Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.

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