MHT CET 2022 Chemistry question

The end product in Hofmann's exhaustive methylation of amines is

(A)Primary amine
(B)Secondary amine
(C)Tertiary amine
(D)Quaternary ammonium halideCorrect

Answer: (D)

Solution

In Hofmann's exhaustive methylation the amine is treated with excess methyl iodide (or methyl halide); the nitrogen is methylated repeatedly (primary secondary tertiary quaternary), e.g. . The exhaustive methylation step

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Question ID VK-094411