Which of the following classes of organic compounds must have at least two oxygen atoms in its functional groups?

Question

Quizplus · Accepted Answer

Both carboxylic acids and carboxylic esters have a functional group consisting of a carbonyl group (C=O) and an oxygen atom bonded to the carbon atom of the carbonyl group. Therefore, both classes of compounds must have at least two oxygen atoms in their functional groups.

Which of the Following Classes of Organic Compounds Must Have