The increasing order of acidity of the following carboxylic acids 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.

An organic acid $P$ $(C_{11}H_{12}O_2)$ can easily be oxidized to a dibasic acid which reacts with ethylene glycol to produce a polymer,dacron. Upon ozonolysis,$P$ gives an aliphatic ketone as one of the products. $P$ undergoes the following reaction sequences to furnish $R$ via $Q$. The compound $P$ also undergoes another set of reactions to produce $S$.
$(1)$ The compound $R$ is
$(2)$ The compound $S$ is
Give the answer for questions $(1)$ and $(2)$.

The major products obtained from the reactions in List-$II$ are the reactants for the named reactions mentioned in List-$I$. Match List-$I$ with List-$II$ and choose the correct option.

List-$I$	List-$II$
$(P)$ Etard reaction	$(1)$ Acetophenone $\xrightarrow{Zn-Hg, HCl}$
$(Q)$ Gattermann reaction	$(2)$ Toluene $\xrightarrow[(ii) SOCl_2]{(i) KMnO_4, KOH}$
$(R)$ Gattermann-Koch reaction	$(3)$ Benzene $\xrightarrow[\text{anhyd. } AlCl_3]{CH_3Cl}$
$(S)$ Rosenmund reduction	$(4)$ Aniline $\xrightarrow[273-278 \ K]{NaNO_2 / HCl}$
	$(5)$ Phenol $\xrightarrow[Zn, \Delta]{ }$

The major products $A$ and $B$ in the following set of reactions are: