CBSE Class 12 · 2004 · Foreign · Compounds Containing NitrogenVery Short Answer

Arrange the following in order of increasing basic character in aqueous solution: NH₃, EtNH₂, Et₂NH, Et₃N.

Answer: NH₃ < Et₃N < EtNH₂ < Et₂NH.

Solution

In water, basicity balances the +I push against hydration of the ammonium ion: the 2° amine wins, the 3° falls below the 1°:

N H_{3} < E t_{3} N < EtN H_{2} < E t_{2} NH

CBSE Class 12 Board · 2004 · Foreign · Subjective