Phenol when treated with excess of bromine water gives a white precipitate of

What is $\mathrm{Z}$ in the following sequence of reactions?

$\mathrm{Z}\stackrel{{\mathrm{PCl}}_5}{\to }\mathrm{X}\stackrel{\mathrm{AlC}.\mathrm{KOH}}{\to }\mathrm{Y}\underset{\left(\mathrm{ii}\right){\mathrm{H}}_2\mathrm{O}; \mathrm{boil}}{\overset{\left(\mathrm{i}\right)\mathrm{Conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}\mathrm{Z}$

What is the final product of the following reaction?

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}+\mathrm{HCl}\stackrel{{\mathrm{ZnCl}}_2}{⟶}{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}+{\mathrm{H}}_2\mathrm{O}$

In the above reaction, the leaving group is: