Question

Among i-iv, the compound that does not undergo polymerization under radical initiation is:

• A. i
• B. ii
• C. iii
• D. iv

Answer 1

The correct option is A i

The compound that does not undergo polymerization under radical initiation, is compound (i).
It is styrene (ethyl benzene). It polymerises through anionic polymerisation to form polystyrene.
$KN{H}_2$ is added during the initiation step of polymerisation to form an ionic intermediate $H_{2}N-C{H}_2{-}^{-}CH-C_6{H}_5{K}^{+}$