For the given compounds,the correct order of increasing $pK_{a}$ value is:

Identify $X$ and $Y$ in the following reaction:
$X \xrightarrow{Y} \text{Benzoquinone}$

Given below are two statements:
Statement $I$: The acidic strength of monosubstituted nitrophenol is higher than phenol because of the electron-withdrawing nitro group.
Statement $II$: $o$-nitrophenol,$m$-nitrophenol,and $p$-nitrophenol will have the same acidic strength as they have one nitro group attached to the phenolic ring.
In the light of the above statements,choose the most appropriate answer from the options given below:

The major product of the following reaction sequence is:
$C_6H_5OH \xrightarrow[(ii) NaOH, (iii) H^+]{(i) CHCl_3, NaOH(aq)} ?$

Benzene $+ HNO_{3(conc.)}$ $\xrightarrow{H_2SO_4} A$ $\xrightarrow[{(ii) OH^{-}}]{{(i) Sn/HCl}} B$ $\xrightarrow[{0 - 5 \ ^oC}]{NaNO_2 + HCl} C$ $\xrightarrow{H_2O/H^{+}} D$. What is $D$?

$4.7 \text{ g}$ of phenol is heated with $Zn$ to give product $X$. If this reaction goes to $60\%$ completion, then the number of moles of compound $X$ formed will be . . . . . . $\times 10^{-2}$. (Nearest Integer) (Given molar mass in $\text{g mol}^{-1}$: $H:1, C:12, O:16$)