JEE Main Chemistry question

Which one of the following is the strongest base in aqueous solution? [AIEEE 2007]

(A)Trimethylamine
(B)Aniline
(C)DimethylamineCorrect
(D)Methylamine

Answer: (C)

Solution

In aqueous solution, base strength of amines is governed by a balance of the electron-donating inductive effect of alkyl groups, steric hindrance to solvation/protonation, and (for aniline) delocalisation of the nitrogen lone pair into the ring. Aniline is much the weakest here because its lone pair is conjugated

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Question ID VK-150226