Question Detail
Question
Which of the following is NOT a carboxylic acid derivative?
Correct Answer
Option D is the correct answer.
Detailed Explanation
Aldehydes are a separate class of carbonyl compounds, not derivatives of carboxylic acids. Carboxylic acid derivatives have the general structure R-CO-Y where Y is an electronegative atom or leaving group (halide, alkoxy, amine, etc.).
Hint
Think of replacing the OH in RCOOH with another group.