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Multiple Choice
Which functional group is present in the structure of an amide?
A
Hydroxyl group (OH)
B
Carbonyl group (C=O) bonded to a nitrogen atom
C
Aldehyde group (CHO)
D
Carboxyl group (COOH)
Verified step by step guidance
1
Begin by understanding the structure of an amide. An amide is a functional group characterized by a carbonyl group \( \text{C=O} \) directly bonded to a nitrogen atom \( \text{N} \).
Recognize that the carbonyl group \( \text{C=O} \) is a key component of the amide structure. This group consists of a carbon atom double-bonded to an oxygen atom.
Identify the nitrogen atom that is bonded to the carbonyl group. This bond is what differentiates amides from other carbonyl-containing functional groups.
Compare the amide structure to other functional groups listed in the problem: Hydroxyl group \( \text{OH} \), Aldehyde group \( \text{CHO} \), and Carboxyl group \( \text{COOH} \). Note that none of these groups have the specific \( \text{C=O} \) bonded to \( \text{N} \) configuration.
Conclude that the defining feature of an amide is the presence of a carbonyl group \( \text{C=O} \) bonded to a nitrogen atom, distinguishing it from the other functional groups mentioned.