Which of the following classes of organic compounds has a functional group consisting of an oxygen atom bonded to a hydrogen atom?

Question

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The functional group consisting of an oxygen atom bonded to a hydrogen atom is called a hydroxyl group (-OH), which is present in carboxylic acids (choice B). Aldehydes (choice A) have a carbonyl group (-C=O) at the end of a carbon chain, while ketones (choice C) have a carbonyl group in the middle of a carbon chain. Therefore, choices A and C do not have a hydroxyl group.

Which of the Following Classes of Organic Compounds Has a Functional