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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3co216

Complete hydrolysis with dilute aqueous acid and heat gives ethanoic acid as the only carboxylic acid from which of the following?

A $(CH X_{3} CO) X_{2} O$
B $CH X_{3} CONH X_{2}$
C $CH X_{3} CH X_{2} COOCH X_{3}$
D $CH X_{3} CN$

Answer: A, B, D

Ethanenitrile, ethanamide and ethanoic anhydride all contain only the ethanoyl unit and give

CH X_{3} COOH

(the nitrile and amide also give

NH X_{4} X^{+}

). Methyl propanoate gives propanoic acid instead.

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