Question

Which of the two acids form anhydrides? (I) Oxalic acid
(II) Succinic acid
(III) Benzoic acid
(IV) Phthalic acid

• A. I & III
• B. II & IV
• C. I & II
• D. III & IV

Hint:

Carboxylic acids with two functional groups (like oxalic and succinic acid) can readily form anhydrides.

Answer 1

The Correct Option is C

Step 1: Anhydride Formation.
Anhydrides are formed by the dehydration of carboxylic acids. Oxalic acid (I) and succinic acid (II) can form anhydrides. Benzoic acid (III) and phthalic acid (IV) are less likely to form anhydrides.
Step 2: Conclusion.
The correct answer is (C), I & II.