Which one of the following is called a carbylamine?

If aniline is treated with a $1:1$ mixture of conc. $HNO_{3}$ and conc. $H_{2}SO_{4}$,$p$-nitroaniline and $m$-nitroaniline are formed in nearly equal amounts. This is due to:

Which one of the following orders is wrong with respect to the property indicated?

$R-CONH_2 \xrightarrow[{(2)H_3O^{+}}]{{(1)LiAlH_4}} P$ (Major),$P$ should be:

In the aqueous phase,what is the correct order of basic strength for methyl-substituted amines?

When a primary amine is heated with $NaNO_2/HCl$,a gas is evolved with brisk effervescence. Identify the gas.
$R-NH_2 \xrightarrow{NaNO_2/HCl} ..................$