A compound '$\mathrm{X}$' is acidic and it is soluble in $\mathrm{NaOH}$ solution, but insoluble in ${\mathrm{NaHCO}}_3$ solution. Compound '$\mathrm{X}$' also gives violet colour with neutral ${\mathrm{FeCl}}_3$ solution. The compound '$\mathrm{X}$' is

$\mathrm{A}$' and '$\mathrm{B}$' formed in the following set of reactions are:

In the cumene to phenol preparation in presence of air, the intermediate is

Find out the major product from the following reaction.

Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following is _________

Find out the major product for the following reaction

Decreasing order of dehydration of the following alcohols is

In a reaction

reagents ‘$\mathrm{X}$’ and ‘$\mathrm{Y}$’ respectively are: