Question

Give reason: Aniline is a weaker base than ammonia.

Answer 1

Lone pair on Nitrogen in aniline are involved in resonance with the benzene ring and therefore not available for donation to that extent as in $N{H}_3$.

According to Lewis theory, the species which easily loses a pair of electron is Lewis base,

Since, ammonia can lose easily electron pair while aniline cannot, thus ammonia is a stronger base than aniline.