Which of the following substances does not dissolve in a sodium carbonate solution?

Which of the following compounds will evolve hydrogen on treatment with metal?

What are the substances $A, B$ and $C$ in the following reaction?
$\text{Phenol}$ $\xrightarrow{Zn} A$ $\xrightarrow[\text{conc. } H_2SO_4]{HNO_3, 60^{\circ}C} B$ $\xrightarrow{Zn, NaOH(aq)} C$

Match the reactions given in Column-$I$ with the bond broken in Column-$II$.

Column-$I$ (Reaction)	Column-$II$ (Bond broken)
$(A)$ $RCH_2OH \xrightarrow{CrO_3} RCHO$	$(i)$ $C-O$ bond breaks.
$(B)$ Phenol $\xrightarrow{HNO_3}$ $p$-Nitrophenol + $o$-Nitrophenol	(ii) $O-H$ bond breaks.
$(C)$ Phenol + $NaOH \rightarrow$ Sodium phenoxide + $H_2O$	(iii) $O-H$ and $C-H$ bonds break.
$(D)$ $CH_3CH_2CH_2OH \xrightarrow{H_2SO_4, \Delta} CH_3CH=CH_2$	(iv) $C-H$ bond breaks.

Identify $A$ in the following reaction.

In which one of the following conversions is phosphorus pentachloride $(PCl_5)$ used as a reagent?