Question

`CH_(3)Br +Nu^(Theta) rarr CH_(3)-Nu +Br^(Theta)`
The decreasing order of the rate of the above reaction with nucleophiles `Nu^(Theta) A` to `D` is-
`[Nbar(u) =(A) phO^(-), (B) AcO^(-), (C)H bar(O),(D) CH_(3)bar(O)]`
A. `(D) gt (C) gt (A) gt (B)`
B. `(D) gt (C) gt (B) gt (A)`
C. `(C) gt (D) gt (A) gt (B)`
D. `(B) gt (D) gt (C) gt (A)`

Answer 1

Correct Answer - `c`
Acidic character:
`underset(pK_(a) "value:")() underset(4.75)(ACOH) gt underset(9.9)(PhOH) gt underset(15.5)(MeOH) gt underset(15.74)(H_(2)O)`
Basic and nucelphilic characters are same because of same nucleophilic centre.
Nucleophliic order:
`{:(AcO^(Theta),lt,PhO^(Theta),lt,MeO^(Theta),lt,overset(Theta)(O)H),((B),lt,(A),lt,(D),lt,(C)):}`