Question

The combination of carboxyl group & hydroxyl group on the same atom is called _____________ functional groups.

• A. carboxylic acid
• B. keetone
• C. aldehyde
• D. ester

Answer 1

The correct option is A carboxylic acid

The combination of carbonyl group $-\underset{\underset{O}{||}}{C}-$ & hydroxyl group$-OH$ on the same atom is called carboxylic acid functional group. It is represented as $-\underset{\underset{O}{||}}{C}-OH$.

For example, acetic acid $C{H}_3-\underset{\underset{O}{||}}{C}-OH$ contains carboxylic acid as functional group.