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

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

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 options: Carboxyl group (-COOH), Hydroxyl group (-OH), Amino group (-NH2), and Carbonyl group (C=O).
4. Recognize that the hydroxyl group (-OH) is the functional group that defines alcohols, as it is directly bonded to a carbon atom in the carbon chain.
5. Conclude that among the options provided, the hydroxyl group (-OH) is the correct functional group commonly found in alcohols.