Azo-dyes are prepared from:

Write short notes on the following:
$(i)$ Carbylamine reaction
$(ii)$ Diazotisation
$(iii)$ Hofmann's bromamide reaction
$(iv)$ Coupling reaction
$(v)$ Ammonolysis
$(vi)$ Acetylation
$(vii)$ Gabriel phthalimide synthesis.

$Methylamine$ on treatment with $chloroform$ $(CHCl_3)$ and ethanolic caustic alkali $(KOH)$ gives a foul-smelling compound. The compound is:

Identify $M$ in the following sequence of reactions:

Which of the following amines does not evolve $N_2$ gas upon reaction with $HNO_2$?

An amine $C_{3}H_{9}N$ reacts with benzene sulphonyl chloride to form a white precipitate which is insoluble in $aq. NaOH$. The amine is