Which of the following is a functional group commonly found in alcohols?

• A. Hydroxyl group ($\mathrm{-OH}$)
• B. Carbonyl group ($>C=O$)
• C. Amino group ($-\mathrm{NH}{2}_{}$)
• D. Carboxyl group ($-\mathrm{COOH}$)

Answer: (A)

Verified step by step guidance

1. Identify the functional groups listed in the problem: Hydroxyl group, Carbonyl group, Amino group, and Carboxyl group.
2. Recall the structure of an alcohol molecule, which typically includes an -OH group attached to a carbon atom.
3. Understand that the -OH group is known as the hydroxyl group, which is characteristic of alcohols.
4. Differentiate the hydroxyl group from other functional groups: the carbonyl group (C=O), amino group (-NH2), and carboxyl group (-COOH).
5. Conclude that the functional group commonly found in alcohols is the hydroxyl group.