Which of the following is the major product,when $p$-cresol is treated with zinc dust?

Which of the following reagents can be used to distinguish between phenol and ethanoic acid?

In Kolbe's reaction,instead of phenol,the phenoxide ion is treated with carbon dioxide. Why?

What are $A$,$B$ and $C$ in the following reactions?
$\text{Cumene}$ $\xrightarrow{O_2} A$ $\xrightarrow{H_3O^{+}} B + C$

Given below are two statements: One is labelled as $Assertion$ $A$ and the other is labelled as $Reason$ $R$:
Assertion $A$: $pK_a$ value of phenol is $10.0$ while that of ethanol is $15.9$.
Reason $R$: Ethanol is a stronger acid than phenol.
In the light of the above statements,choose the correct answer from the options given below:

Which of the following compounds is obtained when phenol reacts with dilute nitric acid at low temperature?