The strongest nucleophile is

The conversion of $A$ to $B$ is an example of which reaction?
$\text{Propanenitrile}$ $\xrightarrow{LiAlH_4} A$ $\xrightarrow{CHCl_3 / \text{alcoholic } KOH, \Delta} B$

The correct order of basic strength for the given nitrogen atoms $(x)$,$(y)$,and $(z)$ is $-$

Acetic acid on heating with $NH_3$ forms $A$. When $A$ reacts with $LiAlH_4$ followed by hydrolysis,it gives $B$. When $B$ is heated with chloroform in $KOH$ medium,it gives $C$. What are $B$ and $C$ respectively?

What are $X$ and $Y$ in the following reactions?

The correct order of basicity of the following compounds is