Which one of the following monomers gives the polymer neoprene on polymerization?

Step-by-step solution

2-chloro but-2-ene (or Chloroprene) is the monomer of neoprene. Related Theory Neoprene elastomer was first synthesized in the 1930 s and became the first synthetic elastomer to provide significant advantages over natural rubber. Caution Neoprene is not a condensation polymer. It is an additional polymer. Neoprene is formed by the free radical or monomer polymerization of chloroprene.