Consider the acidity of the carboxylic acids:
(1) `PhCOOH`
(2) `o-NO_(2) C_(6) H_(4) COOH`
(3) `p-NO_(2) C_(6) H_(4) COOH`
(4) `m-NO_(2) C_(6) H_(4) COOH`
Which of the following order is correct?

Options

A. `2 gt 4 gt 1 gt 3`
B. `2 gt 4 gt 3 gt 1`
C. `1 gt 2 gt 3 gt 4`
D. `2 gt 3 gt 4 gt 1`

Answer

D

Explanation

Electron withdrawing group, increases the acidity of benzoic acid, o-isomer will have higher acidity then corresponding m and p-isomer due to ortho effect