Question

Which of the following is a monomer of natural rubber?
A.Isoprene
B.Chloroprene
C.Caprolactam
D.Styrene

Answer 1

Hint: Chloroprene is a synthetic rubber and not a natural rubber. Caprolactam is a fibre polymer of nylon 6 and styrene as the name suggests is made of polystyrene.

Complete step by step solution:
Polymers are defined as those molecules which have high molecular weight. They are found in a large number of units such as monomers. The units can be one or more than one type of the repeating units of monomer forming a polymer. On the basis of structure polymers can be linear, that is, they have long and straight, branched, that is, they have the linear chain with some branching and cross-linked, that is, they have various linear chains linked to each other by various bonds.
Preparation of natural rubber:
A linear polymer of isoprene is natural rubber. That is natural rubber is a polymer of isoprene. Natural rubber is an example of an additional polymer as it is formed by repeating a monomer without elimination of any molecule.
Synthetic rubber or neoprenes have chloroprene as its monomeric unit and it is also an additional polymer.
Polystyrene is also a polymer that is made up with styrene and an additional polymer too.
Nylon 6 is a polymer and has caprolactam as its monomeric unit. It is a condensation polymer. Condensation polymers are those polymers which are formed by eliminating the smaller molecules such as water and hydrochloride.

According to the above data the correct option is A.

Note:
Natural rubber is also called Indian rubber. It is extracted from the rubber tree; it has extensively many applications and is used to manufacture many products. It is used as an adhesive, insulator and fictional tapes.