The correct order of acidic strength of the following is
(I) Oxalic acid $HOOC - COOH$
(II) Malonic acid $HOOC - C{H}_{2} - COOH$
(III) Succinic acid $HOOC - {\left(C{H}_{2}\right)}_{2} - COOH$
(IV) Glutaric acid $HOOC - {\left(C{H}_{2}\right)}_{3} - COOH$

Question

The correct order of acidic strength of the following is
(I) Oxalic acid

HOOC - COOH

(II) Malonic acid

HOOC - C{H}_{2} - COOH

(III) Succinic acid

HOOC - {\left(C{H}_{2}\right)}_{2} - COOH

(IV) Glutaric acid

HOOC - {\left(C{H}_{2}\right)}_{3} - COOH

Quantrex Academy · Accepted Answer

Correct answer: A. I > II > III > IV

Acidic strength of dicarboxylic acid is based on the +I effect of alkyl group. As +I increases acidic nature decreases.
Compounds with formula

HOOC - {\left(C{H}_{2}\right)}_{n} - COOH

are called dicarboxylic acid.
Acidic strength order is:
Oxalic acid > Malonic acid > Succinic acid > Glutaric acid

The correct order of acidic strength of the following is (I) Oxalic...