CAIE A-Level Chemistry AS 20.1.4 The Difficulty of the Disposal Questions

Practise CAIE 9701 environmental issues for poly(alkenes), explaining persistent waste, landfill problems and toxic gases from burning PVC.

Exam points

state that poly(alkenes) are non-biodegradable, so discarded material persists and accumulates
identify harmful or toxic gases released on burning, using the polymer composition to justify the product
separate the landfill persistence problem from the air-pollution problem caused by incineration

[Maximum number: 2]

Fig. 4.1 shows a possible synthesis of propene, $\mathrm{C}_{3} \mathrm{H}_{6}$ .

Fig. 4.1

Under suitable conditions, propene polymerises to form poly(propene).

Poly(propene) exhibits stereoisomerism.

State two difficulties associated with the disposal of poly(propene).

1

2

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