Heating benzoic acid with $X$ and phenol with $Y$ gives benzene. $X$ and $Y$ are respectively:

Arrange the following compounds in the correct order of their acid strength.

Explain why the alkoxy $(-OR)$ group is an ortho-para directing and ring-activating group for electrophilic aromatic substitution reactions.

$4.7 \text{ g}$ of phenol is heated with $Zn$ to give product $X$. If this reaction goes to $60\%$ completion, then the number of moles of compound $X$ formed will be . . . . . . $\times 10^{-2}$. (Nearest Integer) (Given molar mass in $\text{g mol}^{-1}$: $H:1, C:12, O:16$)

Which of the following substituted phenols is the strongest acid?

The major product formed in the following reaction is: