When phenol is treated with $CHCl_3$ and $NaOH$,which of the following products is obtained?

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

Phenol and benzoic acid are distinguished by

The major product in the following reaction is:

What is the increasing order of acidic strength among the following?
$(i)$ $p-$methoxy phenol
$(ii)$ $p-$methyl phenol
$(iii)$ $p-$nitro phenol

The major product of the following reaction sequence is:
Aniline $\xrightarrow[(i) NaNO_2, HCl, 273-278K]{(ii) H_2O, warm} \text{Product}$ $\xrightarrow[(iv) NaOH]{(iii) Br_2, (excess)} \text{Product}$ $\xrightarrow{(v) CH_3I} \text{Final Product}$