Which one of the following is an example of a thermosetting polymer?

Options

A. `(-CH_(3)-underset(underset(Cl)(|))(C )=CH-CH_(2)-)_(n)`
B. `(-CH_(2)- underset(underset(Cl)(|))(C H)-)_(n)`
C. `(-overset(overset(H)(|))(N)-(CH_(3))_(6) - overset(overset(H)(|))(N)-overset(overset(O)(||))(C )-(CH_(3))_(4)- overset(overset(O)(||))( C)-)_(n)`
D.

Answer

D

Explanation

This a linear polymer called Bakelite or novolac. It is a thermosetting polymer formed by the condensation reaction of phenol and formaldehyde.