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Carboxylic acid reacts with ammonia to form ammonium salts which on heating produces_______________?

Correct answer: D. Acidamide

  • A. CO2
  • B. Alkane
  • C. Ester
  • D. Acidamide

Explanation

A carboxylic acid first reacts with ammonia to form ammonium carboxylate, RCOO-NH4+, and heating removes water to form the acid amide, RCONH2. Thus the product is an amide, not an ester or an alkane. Students may choose ester because both amides and esters are carboxylic acid derivatives, but ammonia supplies nitrogen and leads to an amide.

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About Carboxylic Acid Derivatives

Carboxylic acid derivatives include acid halides, acid anhydrides, esters and amides, formed by replacing the hydroxyl group of a carboxylic acid. Their nomenclature, structures, preparation, hydrolysis and relative reactivity are linked through nucleophilic acyl substitution, which differs from the nucleophilic addition reactions of aldehydes and ketones.

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