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Multiple Choice
Which of the following functional groups is characterized by a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group?
A
Amino group
B
Hydroxyl group
C
Carbonyl group
D
Carboxyl group
Verified step by step guidance
1
Identify the functional groups listed in the problem: amino group, hydroxyl group, carbonyl group, and carboxyl group.
Understand the structure of each functional group: An amino group contains a nitrogen atom bonded to hydrogen atoms (NH₂). A hydroxyl group consists of an oxygen atom bonded to a hydrogen atom (OH). A carbonyl group features a carbon atom double-bonded to an oxygen atom (C=O). A carboxyl group includes a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group (COOH).
Focus on the description given in the problem: a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group.
Match the description to the correct functional group: The description matches the structure of a carboxyl group, which is characterized by the presence of both a carbonyl group (C=O) and a hydroxyl group (OH) bonded to the same carbon atom.
Conclude that the functional group described in the problem is the carboxyl group, as it fits the given structural characteristics.