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PVC is prepared by the polymerisation of:

1. ethylene
2. 1-chloropropene
3. propene
4. 1-chloroethene

Correct answer: 1-chloroethene

Solution

PVC is poly(vinyl chloride), so its monomer must be vinyl chloride, also called 1-chloroethene. During addition polymerization, the C=C bond opens and links many 1-chloroethene units into the polymer chain.

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