Identify number of reactions that can give benzene as major product

The functional group which is formed when Phenol is made to react with Chloroform in the presence of dilute Sodium hydroxide

The major product of the following reaction is:

The major product(s) of the following reaction is/are:

The major product of the following reaction is:
 

In the following reaction, the product(s) formed is/are:

What is the product "C" after following reactions -


 

The increasing order of the $pKa$ values of the following compounds is:

What is $\text{Z}$ in the following sequence of reactions?
$\mathrm{Phenol}\stackrel{\mathrm{Zn} \mathrm{dust}}{\to }\mathrm{X}\stackrel{{\mathrm{CH}}_3\mathrm{Cl}/\mathrm{Anhydrous} {\mathrm{AlCl}}_3}{\to }\mathrm{Y}\stackrel{\mathrm{Alkaline} {\mathrm{KMnO}}_4}{\to }\mathrm{Z}$