Identify $Z$ in the following reaction sequence:
$CH_3COONH_4$ $\xrightarrow{\Delta} X$ $\xrightarrow{P_2O_5} Y$ $\xrightarrow{H_2O/H^+} Z$

Product $(X)$ is

Identify the product $Y$ in the following reaction sequence:
$Benzene + CH_3CH_2CH_2Cl$ $\xrightarrow{AlCl_3} X$ $\xrightarrow{KMnO_4} Y$

$A$ $\xrightarrow[\text{(ii) } H_3O^{+}]{\text{(i) } NaOH} B$ $\xrightarrow[\text{(ii) } H_2SO_4, \Delta]{\text{(i) } EtOH} C$
'$A$' shows positive Lassaigne's test for $N$ and its molar mass is $121$.
'$B$' gives effervescence with aq. $NaHCO_3$.
'$C$' gives fruity smell.
Identify $A, B$ and $C$ from the following.

Match the following.

List-$I$ (Substance)	List-$II$ (Use)
$(A)$ Methanoic acid	$(i)$ Textile
$(B)$ Ethanoic acid	$(iv)$ Vinegar
$(C)$ Hexanedioic acid	$(ii)$ Polymer
$(D)$ Sodium benzoate	$(iii)$ Food preservative

In the given reaction $[X]$ will be :