Identify the polymer obtained by using the monomer shown in the image:

How is the following resin intermediate prepared and which polymer is formed by this monomer unit?

Which of the following is the monomer of neoprene?

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

The polymer $X$ consists of linear molecules and is closely packed. It is prepared in the presence of triethylaluminium and titanium tetrachloride under low pressure. The polymer $X$ is -

For spontaneous polymerization,which of the following is (are) correct?