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JEE Advanced levelSingle correct optionDifficulty 3 of 3ro051

N-Methylacetamide, $CH X_{3} CO - NH - CH X_{3}$ , is (i) refluxed with dilute HCl to give P (organic products) and (ii) treated separately with excess $LiAlH X_{4}$ followed by water to give Q. P and Q are respectively

Aacetamide and methanol; ethanol
Bacetic acid and methylammonium chloride; N-methylethanamine
Cacetic acid and methylamine (free base); N-methylacetamide
Dacetaldehyde and methylammonium chloride; ethanamine

Answer: B

(i) Amide hydrolysis gives

CH X_{3} COOH

and

CH X_{3} NH X_{3} X^{+} Cl X^{-}

. (ii)

LiAlH X_{4}

reduces C=O to

CH X_{2}

, giving

CH X_{3} CH X_{2} NHCH X_{3}

, N-methylethanamine.

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