JEE Main Chemistry question

In aqueous solutions, the basic strength of amines decreases in the order [JCECE 2010]

(A)CH_3NH_2 > (CH_3)_2NH > (CH_3)_3N
(B)(CH_3)_2NH > (CH_3)_3N > CH_3NH_2
(C)(CH_3)_3N > (CH_3)_2NH > CH_3NH_2
(D)(CH_3)_2NH > CH_3NH_2 > (CH_3)_3NCorrect

Answer: (D)

Solution

In aqueous solution, basicity is governed by both the electron-donating inductive effect of alkyl groups and the ease of solvation (hydrogen-bonding) of the resulting ammonium ion. The secondary amine, , best balances these factors and is the most basic; the

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Question ID VK-150297