Which of the following is $NOT$ a dihydric alcohol?

Phenol is heated with a solution of a mixture of $KBr$ and $KBrO_3$. The major product obtained in the above reaction is:

In the given reaction sequence,identify the processes $X$ and $Y$ respectively to obtain salicylaldehyde from chlorobenzene:
$Chlorobenzene$ $\xrightarrow{X} Phenol$ $\xrightarrow{Y} Salicylaldehyde$

What product is formed when phenol reacts with dilute $HNO_3$?

Benzoylation of phenol with benzoyl chloride in the presence of dilute $NaOH$ gives phenyl benzoate. This reaction is an example of

Which of the following orders is true regarding the acidic nature of phenol and its derivatives?