Question

X on polymerisation gives neoprene. Identify X.

(a) 1-Chloro-1,3-butadiene

(b) 2-Chloro-1,3-butadiene

(c) 1-Methyl-1,3-butadiene

(d) 2-Methyl-1,3-butadiene

I got this question in an interview for job.

My enquiry is from Types of Polymerisation Reactions in portion Polymers of Chemistry – Class 12

Answer 1

Right choice is (b) 2-Chloro-1,3-butadiene

To explain: Neoprene or polyisoprene is a synthetic rubber obtained from the addition polymerisation of chloroprene (2-chloro-1,3-butadiene) through free radical mechanism. It has a better stability towards oxidation than natural rubber.