Account for the following: Diazonium salts of aromatic amines are more stable than those of aliphatic amines.

Account for the following:

Gabriel phthalimide synthesis is preferred for synthesising primary amines.

Arrange the following:

In increasing order of basic strength:
${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{N}{\mathrm{H}}_2, {\mathrm{C}}_6{\mathrm{H}}_5\mathrm{N}{\left(\mathrm{C}{\mathrm{H}}_3\right)}_2, {\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_2\mathrm{N}\mathrm{H}$ and ${\mathrm{CH}}_3{\mathrm{NH}}_2$

Arrange the following:

In increasing order of basic strength:
(a) Aniline, $\mathrm{p}-$nitroaniline and $\mathrm{p}-$toluidine
 

Arrange the following:

In increasing order of basic strength:
(b) ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{N}{\mathrm{H}}_2, {\mathrm{C}}_6{\mathrm{H}}_5\mathrm{N}\mathrm{H}\mathrm{C}{\mathrm{H}}_3, {\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}{\mathrm{H}}_2\mathrm{N}{\mathrm{H}}_2$
 

Arrange the following in increasing order of boiling point: ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{O}\mathrm{H}, {\left(\mathrm{C}{\mathrm{H}}_3\right)}_2\mathrm{N}\mathrm{H}, {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{N}{\mathrm{H}}_2$.