Which of the following acids cannot be prepared directly from carboxylic acid?
Correct answer: B. Acid amide
- A. Acid halide
- B. Acid amide
- C. Ester
- D. Acid anhydride
Explanation
Acid amide cannot be prepared by the reaction of a carboxylic acid with ammonia. Carboxylic acids react with ammonia to form ammonium salts which on heating produce acid amides. CH3COOH + NH3 --> CH3COONH4 + H2O CH3COONH4 --> CH3CONH2
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