Identify a monomer used in preparation of neoprene.

Step-by-step solution

Neoprene is synthesized through addition polymerization of chloroprene , chemically designated as 2-chloro-1,3-butadiene. Option analysis: A) 2-methyl-1,3-butadiene (isoprene): monomer for natural rubber B) 2-chloro-1,3-butadiene (chloroprene): monomer for neoprene C) Melamine: monomer for melamine-formaldehyde resin D) 1,3-butadiene: monomer for Buna-S and Buna-N rubbers The monomer for neoprene is thus 2-chloro-1,3-butadiene.