What is the product formed when an aliphatic primary amine reacts with $HNO_2$?

Which of the following reactions is an example of ammonolysis?

Which of the following represents the correct order of basicity in an aqueous medium?

Identify the final product $Z$ in the following reaction sequence:
$Aniline$ $\xrightarrow{CH_3COCl} X$ $\xrightarrow{Br_2/AlBr_3} Y$ $\xrightarrow{H_3O^+} Z$

Several factors (steric,electronic,orbital interactions,etc.) can affect the inversion barrier of an amine. In the given pairs,which data is correctly placed?

Arrange the following compounds in increasing order of their basicity:
$CH_3NH_2, (CH_3)_2NH, C_6H_5NH_2, (CH_3)_3N$