question_answer

The decreasing order of rate of \[{{S}_{N}}2\] reaction is:

A) IV > III > II > I

B) II > III > I > IV

C) II > I > IV > III

D) None of these

Correct Answer: C

Solution :

[c] Here all the alky1 halides are primary so here order rate of \[{{S}_{N}}2\]reaction is not on the basis of hinderance. In this-I group attached will increase the rate of \[{{S}_{N}}2\]reaction and +I group attached will decrease.