arrange the compounds in increasing order of rate of reaction towards nucleophlic substitution.

Options

A. (i) `lt` (ii) `lt` (iii)
B. (ii) `lt` (i) `lt` (iii)
C. (iii) `lt` (ii) `lt` (i)
D. (i) `lt` (iii) `lt` (ii)

Answer

C

Explanation

Presence of electron releasing group at ortho and para position w.r.t. to chlorine decreases the rate of nucleophilic substitution reaction. Compound (iii) has two electron releasing groups and compound (ii) has one electron releasing group w.r.t. chlorine while compound (i) has no electron releasing group. So, the rate of nucleophilic substitution reaction is highest in compound (i) and order is (iii) `lt` (ii) `lt` (i).