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Multiple Choice
Which of the following functional groups is characterized by a carbon atom double-bonded to an oxygen atom?
A
Carbonyl group
B
Carboxyl group
C
Amino group
D
Hydroxyl group
Verified step by step guidance
1
Identify the functional groups listed in the problem: Carbonyl group, Carboxyl group, Amino group, and Hydroxyl group.
Understand the structure of each functional group: A carbonyl group is characterized by a carbon atom double-bonded to an oxygen atom, represented as .
Compare the structures: The carboxyl group contains a carbonyl group as part of its structure, but it also includes an -OH group, making it . The amino group contains nitrogen, typically . The hydroxyl group is simply an -OH group.
Focus on the carbonyl group: It is the simplest structure with a carbon atom double-bonded to an oxygen atom, without additional atoms or groups attached.
Conclude that the carbonyl group is the correct answer based on its defining feature of a carbon atom double-bonded to an oxygen atom.