The compound that does $NOT$ liberate $CO_2$ on treatment with aqueous sodium bicarbonate solution is:

The rate of electrophilic substitution reaction in phenol is:

Which of the following has the highest $pK_{a}$ value?

The acidic property of phenol can be explained when it is reacted with:

The heating of phenyl methyl ether with $HI$ produces an aromatic compound $A$ which on treatment with conc. $HNO_3$ gives $B$. $A$ and $B$ respectively are

Reaction of phenol with $NaOH$ followed by heating with $CO_{2}$ under high pressure,and subsequent acidification gives compound $X$ as the major product,which can be purified by steam distillation. When reacted with acetic anhydride in the presence of a trace amount of conc. $H_{2}SO_{4}$,compound $X$ produces $Y$ as the major product. Compound $Y$ is $....$