Question
The amino group in ethyl amine is basic, whereas that in acetamide, it is not basic. Why?
Solution
In acetamide, delocalization of lone pair of an electron on N due to resonance gives rise to lesser availability of a lone pair of the electron for coordination whereas in amines no such resonance exists.

Thus, amino group in ethyl amine is basic.

Thus, amino group in ethyl amine is basic.