Chemistry - Polymer Question with Solution | TestHub

Nylon-6 is prepared by heating caprolactam with water at a high temperature ($533-543$ K). Caprolactam is a cyclic amide, and its polymerization involves the opening of this ring to form a linear polymer.

Terylene is a condensation polymer of ethylene glycol and terephthalic acid.

Nylon-6,6 is a condensation polymer of hexamethylenediamine and adipic acid.

Bakelite is a condensation polymer of phenol and formaldehyde.

Therefore, Nylon-6 is the only polymer among the given options obtained by ring opening polymerization.

Answer: Nylon-6