Which of the following polymer is NOT a thermoplastic?

Correct answer: (b) Neoprene

Explanation

Neoprene is a synthetic rubber (an elastomer) made by polymerization of chloroprene, so it is not a thermoplastic.

Thermoplastics soften on heating and harden on cooling, and can be remoulded repeatedly.

Teflon, Polystyrene and Polythene are all true thermoplastics.