Question

What is the monomer unit of natural rubber?

• A. Isoprene
• B. Ethene
• C. Neoprene
• D. Tetrafluro ethene

Answer 1

The correct option is A

Isoprene

Explanation for correct option

(A) Natural Rubber

• Natural rubber is a linear polymer of isoprene $\left(2-\mathrm{methyl}-1,3-\mathrm{butadiene}\right)$ as shown in the diagram given below:-

• So, the monomer unit of natural rubber is isoprene.
• The structure of isoprene is as follows:-

Explanation for incorrect options

(B) Ethene is a monomer of polythene.

(C) Neoprene is formed by the free radical polymerization of chloroprene. So, neoprene is a polymer.

(D) Tetrafluro ethene is a monomer of Teflon.

The monomer unit of natural rubber is isoprene. Hence, the correct option is (A).