Why o-derivative is weaker base than aniline?

Aniline is a weaker base than benzyl amine.

P - nitroanilin is a weaker base than aniline. Explain.

p-methoxyaniline is a stronger base than aniline but p-nitroaniline is a weaker base than aniline. Explain.

p-methoxyaniline is a stronger base than aniline but p-nitroaniline is a weaker base than aniline. Explain.

PH3 is a weaker base than NH3

Why pyridine is a much weaker base than aliphatic amines ?

Why pyridine is a much weaker base than aliphatic amines ?

Explain - why methylamine is a stronger base than aniline ?

All aliphatic amines are more basic than ammonia but due to delocalization of lone pair of electrons of the nitrogen atom on the benzene ring, aniline is a weaker base than ammonia. The basic strength of the substituted anilines, however, depends upon the nature of the substituent. Whereas electron-donating groups tend to increase, electron-withdrawing groups tend to decrease the basic strength. The base strengthening effect of the electron-donating groups and base weakening effect of the electron-withdrawing groups is, however ,more pronounced at p-than at m-position. However, due to ortho effect, o-substituted anilines are weaker bases than anilines regardless of the nature of substituent whether electron-donating or electron-withdrawing. What is the order of basicity of I. p-methylaniline II. m-methylaniline III, aniline IV. o-methylaniline