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Which of the following is a homopolymer (NOT a copolymer)?

1. Buna-S
2. Neoprene
3. PHBV
4. Butadiene-styrene rubber

Correct answer: Neoprene

Solution

Buna-S (butadiene + styrene), PHBV (3-hydroxybutyrate + 3-hydroxyvalerate) and butadiene-styrene rubber are all copolymers. Neoprene (polychloroprene) is synthesised from a single monomer (chloroprene), making it a homopolymer.

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