Account for the following:
i) (CH₃)₂ NH is stronger base than NH₃
ii) CH₃CH₂NH₂ is more basic than CH₃CONH₂
iii) Aniline is less basic than Ethyl amine
iv) On sulphonation of aniline, p-amino benzene sulphonic acid is formed.

Account for
i) Reduction of CH₃CH gives CH₃CH₂NH₂ while CH₃NC gives (CH₃)₂NH.
ii) (CH₃)₂NH requires two molar proportion of CH₃I to give the same crystalline product formed by (CH₃)₂N with one mole of CH₃l.
iii) Nitration of aniline with conc.HNO₃ may end up with same meta nitro product.
iv) p-toluidine is a stronger base than p-nitroaniline.

How can the following coversion be effected?
i) Nitrobenzene ⇾ Nitrosobenzene
ii) Nitrobenzene ⇾ Azoxybenzene
iii) Nitrobenzene ⇾ Hydrazobenzene

How do primary, secondary and tertiary amines react with nitrous acid?

Outline the mechanism of
(a) Nitration of aniline,
(b) Acetylation of aniline.