NEET 2019 Chemistry question

The correct order of the basic strength of methyl substituted amines in aqueous solution is :

(1)Correct
(2)
(3)
(4)

Answer: (1)

Solution

In aqueous solution the basic strength of an amine is governed by three factors together: the +I effect of the alkyl groups (increasing electron density on N), the solvation (hydrogen-bonding) of the ammonium cation formed, and steric hindrance. For methyl-substituted amines the experimental values are:

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Question ID VK-092464