In the Reimer-Tiemann reaction,phenol is converted into salicylaldehyde through an intermediate. The structure of the intermediate is . . . . . . .

One mole of phenol is treated with dilute $HNO_3$ at $298 \ K$ to give a mixture of products. The mixture is separated by steam distillation. The steam volatile compound $(X)$ is separated. The increase in percentage of oxygen in $(X)$ with respect to phenol is . . . . . . $\times 10^{-1}$ %. (Given molar mass in $g \ mol^{-1}$: $H:1, C:12, N:14, O:16$)

At low temperature,phenol reacts with $Br_2$ in $CS_2$ to form:

Which type of solution of phenol is required to prepare Orange dye by coupling reaction?

The gases evolved in reactions $(I)$ and $(II)$ are.......

What is the product formed when phenol reacts with concentrated $HNO_3$?