Question

Which of the following compounds is present in natural rubber as a monomer?

• A. 1, 3-Butadiene
• B. 2-Chloro-1,3-butadiene
• C. Styrene
• D. 2-Methyl-1,3-butadiene

Hint:

Natural rubber is made from polymerizing 2-methyl-1,3-butadiene (isoprene), which is a key monomer in the formation of polyisoprene.

Answer 1

The Correct Option is D

Step 1: Understanding the monomer in natural rubber.
Natural rubber is made from polymerizing 2-methyl-1,3-butadiene, also known as isoprene. This monomer undergoes addition polymerization to form polyisoprene, the polymer that makes up natural rubber.

Step 2: Analyzing the options.
(A) 1, 3-Butadiene: This is used in the production of synthetic rubber but is not the monomer in natural rubber.
(B) 2-Chloro-1,3-butadiene: This compound is not used in the production of natural rubber.
(C) Styrene: Styrene is used in the production of polystyrene, not natural rubber.
(D) 2-Methyl-1,3-butadiene: Correct — This is the monomer used in the production of natural rubber.

Step 3: Conclusion.
The correct monomer for natural rubber is (D) 2-Methyl-1,3-butadiene.