Neoprene is a polymer of

Which of the following polymers can be formed by a condensation polymerization reaction?

The widely used plastic $PVC$ is a polymerization product of

The monomers used in the preparation of Dextron are

The following structure represents a subunit of a hydrocarbon polymer that may be prepared by a radical polymerization method. Identify the monomer that has been polymerized to make this polymer chain.

The Ziegler-Natta catalyst used for polymerisation of ethene and styrene is $TiCl_4 + (C_2H_5)_3Al$. The catalysing species (active species) involved in the polymerisation is