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Multiple Choice
Which of the following functional groups is characterized by a carbon double-bonded to an oxygen and single-bonded to a hydroxyl group?
A
Amino group
B
Carbonyl group
C
Hydroxyl group
D
Carboxyl group
Verified step by step guidance
1
Identify the functional groups listed in the problem: amino group, carbonyl group, hydroxyl group, and carboxyl group.
Understand the structure of each functional group: An amino group contains a nitrogen atom bonded to hydrogen atoms. A carbonyl group consists of a carbon atom double-bonded to an oxygen atom. A hydroxyl group is characterized by an oxygen atom single-bonded to a hydrogen atom.
Recognize that a carboxyl group is a combination of a carbonyl group and a hydroxyl group, where a carbon atom is double-bonded to an oxygen atom and single-bonded to a hydroxyl group (OH).
Visualize the structure of a carboxyl group: \( \text{R-COOH} \), where \( \text{R} \) represents the rest of the molecule, \( \text{C} \) is the carbon atom, \( \text{O} \) is the oxygen atom, and \( \text{OH} \) is the hydroxyl group.
Conclude that the functional group characterized by a carbon double-bonded to an oxygen and single-bonded to a hydroxyl group is the carboxyl group.