Explain the oxidation of phenol in the presence of chromyl chloride.

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

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

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

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

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