What are the structures of $X$,$Y$,and $Z$ in the above given reaction sequence?

Heating the acyl azide in dry toluene under reflux for $3$ hours gives a $90\%$ yield for a heterocyclic product. Identify the product $(A)$.

Alkyl halide on heating with alc. $NH_3$ in a sealed tube results in...

Given below are two statements:
Statement-$I$ : Oxidation of $p$-nitrotoluene with acidic $KMnO_4$ gives an acid that is stronger than benzoic acid.
Statement-$II$ : Reduction of $p$-nitrotoluene with $Sn/HCl$ followed by neutralization gives an amine that is more basic than aniline.
In light of the above statements, choose the most appropriate answer from the options given below.

The ammonolysis of alcohol is represented by the reaction $xCH_3OH + yNH_3 \xrightarrow[Al_2O_3/ThO_2]{300-400^{\circ}C} \text{Products}$. The products formed are:

What is the total number of possible amines (excluding stereoisomers) for the molecular formula $C_3H_9N$?