Question

Free radical chlorination is a highly reactive process but very less selective, however, free radical bromination is less reactive, require a greater amount of energy very highly selective.
State whether the statement is True or False

Answer 1

Reactivity and selectivity have inverse relationship. Higher reactivity results in lower selectivity and lower reactivity results in higher selectivity.
Free radical chlorination is highly reactive process but very less selective. Hence, the substitution is governed by the probabiity factor.
However free radical bromination is less reactive, require greater amount of energy (and occurs at higher temperature) very highly selective. Hence, substitution is governed by relative reactivity of H atom.