Which of the following functional groups is commonly found in alcohols?

• A. Carbonyl group ($C=O$)
• B. Hydroxyl group ($-OH$)
• C. Amino group ($-NH2$)
• D. Carboxyl group ($-COOH$)

Answer: (B)

Verified step by step guidance

1. Identify the functional group associated with alcohols. Alcohols are characterized by the presence of a hydroxyl group.
2. Understand the structure of a hydroxyl group. It is represented as \(-OH\), where an oxygen atom is bonded to a hydrogen atom.
3. Differentiate between the given functional groups: Carbonyl group \((C=O)\), Amino group \((-NH_2)\), and Carboxyl group \((-COOH)\).
4. Recognize that the carbonyl group \((C=O)\) is typically found in aldehydes and ketones, not alcohols.
5. Conclude that the hydroxyl group \((-OH)\) is the functional group commonly found in alcohols, distinguishing them from other organic compounds.