Why ammonia is a stronger base than phosphine?

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

Assertion: p-nitroaniline is a stronger base than p-toluidine. Reason : The electron withdrawing -NO_2 group in p-nitroaniline makes it a stronger base.

Why is ammonia mere basic than phosphine ?

Why Methyl amine is stronger base than ammonia ?

Why acetic-acid is a stronger acid than phenol ?

Alkyl amines are stronger bases than aryl amines. Justify.

Secondary amine is stronger base than tertiary amine. Give reason.

Give possible explanation that aliphatic amines are stronger bases than ammonia.