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Identify the monomer used to prepare neoprene from the following compounds.

1. CH2=C(CH3)—CH=CH2
2. CH2=C(Cl)—CH=CH2
3. CH2=CH—C≡CH
4. CH2=CH—CH=CH2

Correct answer: CH2=C(Cl)—CH=CH2

Solution

The correct option is a chlorinated diene, which can undergo polymerization to form neoprene, a synthetic rubber. The presence of the chlorine atom in the monomer facilitates the polymerization process, leading to the formation of a stable polymer structure.

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