Consider the acidity of the carboxylic acids I. PhCOOH II. O - NO_(2)C_(6)H_(4)COOH III. pNO_(2)C_(6)H_(4)COOH IV. m-NO_(2)C_(6)H_(4)COOH Which of the following order is correct

Consider the acidity of the carboxylic acids I. PhCOOH II. O - NO_(2

1.	Consider the acidity of the carboxylic acids I. PhCOOH II. O - NO_(2)C_(6)H_(4)COOH III. pNO_(2)C_(6)H_(4)COOH IV. m-NO_(2)C_(6)H_(4)COOH Which of the following order is correct
Answer» `I gt II gt III gt IV` `II gt IV gt III gt I` `II gt IV gt I gt III` `II gt III gt IV gt I` Solution :Electron WITHDRAWING group increases the acidity of benzoic ACID, `o-`isomer will have higher acidity than `m` and `p` isomer DUE to ortho effect. The `NO_(2)` group at `p` position have more pronounce electron withdrawing effect than `-NO_(2)` group at `m` position. Hence order of acidity is