CAIE A Level Chemistry 9701 · Polymerisation
Poly(propene) is an addition polymer used to make ropes and food containers. Ropes and containers made from poly(propene) are often disposed of in landfill sites, where they may remain for decades. Explain why poly(propene) is not biodegradable and why its disposal by combustion can produce harmful products.
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.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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