Question

The decreasing order of nucleophilicities of the following is :
(I) `H_2 O`
(II) `EtOH`
(III) `MeCOO^(Ө)`
(IV) `overset (Ө) O H`
(V) `EtO^(Ө)`.
A. `(V) gt (IV) gt (III) gt (II) gt (I)`
B. `(I) gt (II) gt (III) gt (IV) gt (V)`
C. `(IV) gt (V) gt (III) gt (II) gt (I)`
D. `(I) gt (II) gt (III) gt (V) gt (IV)`

Answer 1

Correct Answer - A
Acidity : `H_3 O^(oplus) gt Et overset (oplus) O H_2 gt MeCOOH gt H_2 O gt EtOH`.
Basicity and nucleophilicity : `H_2 O lt MeOH lt MeCOO^(Ө) lt overset (Ө)O H lt EtO^(Ө)` [i.e., `(V) gt (IV) gt (III) gt (II) gt (I)`].