Question

Direction: in the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution.

(i)

(1) (I)< (II)< (III) (2) (III)< (II)< (I)

(3) (I)< (III)< (II) (4) (III)< (I)<(II)

(ii)

(1) (I)< (II)< (III) (2) (I)< (III)< (II)

(3) (III)< (II)< (I) (4) (II)< (III)<(I)

(iii)

(1) (III)< (II)< (I) (2) (II)< (III)< (I)

(3) (I)< (III)< (II) (4) (I)< (II)<(III)

(iv)

(1) (I)< (II)< (III) (2) (II)< (I)< (III)

(3) (III)< (II)< (I) (4) (I)< (III)<(II)

• A. (I)< (II)< (III); (1) (I)< (II)< (III); (1) (III)< (II)< (I); (1) (I)< (II)< (III)
• B. (III)< (II)< (I); (2) (I)< (III)< (II); (2) (II)< (III)< (I); (2) (II)< (I)< (III)
• C. (I)< (III)< (II); (3) (III)< (I)< (II); (3) (I)< (II)< (III); (3) (III)< (II)< (I)
• D. (III)< (I)< (II); (4) (II)< (III)< (I); (4) (I)< (III)< (II); (4) (I)< (II)< (III)

Answer 1

Answer: (A)

(I)< (II)< (III); (1) (I)< (II)< (III); (1) (III)< (II)< (I); (1) (I)< (II)< (III)

Answer 2

In compound (I), Br is directly attached to chiral C atom thus, will give recemic mixture on nucleophilic substitution $(S_{N}1)$ by $OH^{-}$ion.