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Multiple Choice
Which of the following functional groups is present in all alcohols?
A
Hydroxyl group (-OH)
B
Carbonyl group (C=O)
C
Amino group (-NH2)
D
Carboxyl group (-COOH)
Verified step by step guidance
1
Identify the functional groups listed in the problem: Hydroxyl group (-OH), Carbonyl group (C=O), Amino group (-NH2), and Carboxyl group (-COOH).
Understand the definition of an alcohol in organic chemistry: Alcohols are organic compounds where a hydroxyl group (-OH) is bonded to a saturated carbon atom.
Recognize that the hydroxyl group (-OH) is the defining feature of alcohols, distinguishing them from other organic compounds.
Compare the functional groups: The carbonyl group (C=O) is typically found in aldehydes and ketones, the amino group (-NH2) is characteristic of amines, and the carboxyl group (-COOH) is present in carboxylic acids.
Conclude that the hydroxyl group (-OH) is the functional group present in all alcohols, as it is the key structural component that characterizes this class of compounds.