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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
Amino group
C
Carboxyl group
D
Hydroxyl group
Verified step by step guidance
1
Identify the functional groups listed in the problem: Carbonyl group, Amino group, Carboxyl 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 (C=O).
Recognize that the amino group consists of a nitrogen atom bonded to hydrogen atoms (NH2), which does not involve a carbon-oxygen double bond.
Note that the carboxyl group contains both a carbonyl group (C=O) and a hydroxyl group (OH), but the defining feature of a carbonyl group is the C=O bond itself.
The hydroxyl group is characterized by an oxygen atom single-bonded to a hydrogen atom (OH), which is different from the carbon-oxygen double bond in a carbonyl group.