Diols $(I-IV)$ which react with $CrO_3$ in aqueous $H_2SO_4$ and yield products that readily undergo decarboxylation on heating,are

Identify the major products $A$ and $B$ respectively in the following reactions of phenol.

Identify the reagents $X$,$Y$,and $Z$ in the following reaction schemes:
$(i)$ Benzene $\xrightarrow{X}$ Benzenesulfonic acid $\xrightarrow{Y}$ Sodium phenoxide $\xrightarrow{Z}$ Phenol
$(ii)$ Aniline $\xrightarrow{X}$ Benzenediazonium chloride $\xrightarrow{Y}$ Phenol
$(iii)$ Chlorobenzene $\xrightarrow{X}$ Sodium phenoxide $\xrightarrow{Y}$ Phenol

Match the structures in Column-$I$ with their common names in Column-$II$ and $\text{IUPAC}$ names in Column-$III$.

Column-$I$	Column-$II$ (Common Name)	Column-$III$ ($\text{IUPAC}$ Name)
$(A)$ Phenol	$(1)$ Resorcinol	$(i)$ Benzene$-1,2-$diol
$(B)$ Benzene$-1,3-$diol	$(2)$ Catechol	(ii) Phenol
$(C)$ Benzene$-1,2-$diol	$(3)$ Phenol	(iii) Benzene$-1,4-$diol
$(D)$ Benzene$-1,4-$diol	$(4)$ Hydroquinone	(iv) Benzene$-1,3-$diol

Which of the following reactions gives alcohol or phenol as a product?
$(i)$ $C_2H_5COOH \xrightarrow{LiAlH_4} C_2H_5CH_2OH$
$(ii)$ $C_2H_5Br$ $\xrightarrow[\text{then } H_2O]{\text{Mg, dry ether}} C_2H_5MgBr$ $\xrightarrow{H_2O} C_2H_6$
$(iii)$ $\text{Benzene diazonium chloride} \xrightarrow{H_3PO_2, H_2O} \text{Benzene}$
$(iv)$ $4-\text{Chlorotoluene} \xrightarrow[300 \text{ atm}]{\text{NaOH, } 623 \text{ K}} 4-\text{Methylphenol}$

Ethanol and phenol cannot be distinguished by