Natural and Synthetic Rubbers

The material used by dentists in root canals is

Which of the following structures represent repeating units of neoprene polymer?

Which of the following is the monomer of natural rubber?

The monomer units of polymer Buna-N.

Copolymerization of $1,3$ $-\mathrm{butadiene}$ and acrylonitrile gives

Assertion:- Natural Rubber has elastic property.
Reason:- It has linear structure.

Assertion:- Natural rubber is cis-$1,4$-polyisoprene.

Reason:- Isoprene is $2$ -methyl-$1,3$-butadiene.

Which of the following are monomers of natural rubber and neoprene respectively:

Monomers of natural rubber and neoprene are respectively:

Isoprene is:

The monomers of buna$-\mathrm{S}-$rubber are:

Neoprene, an important synthetic rubber, is formed by:

The polymerisation reaction shown below

would produce:

Structures of some common polymers are given. Which one is not correctly presented?

The monomer used for preparing neoprene rubber is

To improve the quality and tensile strength of natural rubber is heated with sulphur. This process is known as 

Identify the structure of neoprene polymer.

Which is the monomer of neoprene in the following?

Cis-$1,4$-polyisoprene is called

Two different polymers that can be formed from isoprene are natural rubber and gutta percha. What type of isomerism exists in between these two?