The correct increasing order of the acidic strength of acids, butyric acid (I), 2-chlorobutyric acid (II), 3-chlorobutyric acid (III) and 2,2-dichlorobutyric acid (IV) is

Options

A. `IltIIltIIIltIV`
B. `IIIltIIltIVltI`
C. `IltIIIltIIltIV`
D. `IIIltIltIIltIV`

Answer

C

Explanation

Among the acids
(i) Butyric acid
(ii) 2-chlorobutyric acid
(iii) 3-chlorobutyric acid
(iv) 2-dichlorobutyric acid
The acidic strength increases on.
(i) Presence of electron with drawing group, (i.e. -I group)
(ii) Closeness of electron withdrawing group from the — COOH groups.
(iii) Number of electron with drawing groups, (i.e. -I group)
Hence, the conect order will be` I lt III lt II lt IV`