Chemical Properties of Phenols

In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion : Phenols give $\mathrm{o}-$ and $\mathrm{p}-$nitrophenol on nitration with conc. ${\mathrm{HNO}}_3$ and ${\mathrm{H}}_2{\mathrm{SO}}_4$ mixture.
Reason : $—\mathrm{OH}$ group in phenol is $\mathrm{o}–, \mathrm{p}–$ directing.

Assertion : Phenol is more reactive than benzene towards electrophilic substitution reaction.
Reason : In the case of phenol, the intermediate arenium ion is more stabilized by resonance.

Electrophilic substitution involved in _____ of phenol.

At high temperature, phenol produces para product on sulphonation.

What is sulphonation reaction of phenol?

Write the reaction of phenol with sulphuric acid.

The reaction sequence,

the major products $\mathrm{X}$ and $\mathrm{Y}$, respectively, are

Reaction of phenol with $\mathrm{NaOH}$ followed by heating with ${\mathrm{CO}}_2$ under high pressure, and subsequent acidification gives compound $\mathrm{X}$ as the major product, which can be purified by steam distillation. When reacted with acetic anhydride in the presence of a trace amount of conc. ${\mathrm{H}}_2{\mathrm{SO}}_4 ,$ compound $\mathrm{X}$ produces $\mathrm{Y}$ as the major product. Compound $\mathrm{Y}$ is

Phenol on sulphonation at ${100}^{\circ }\mathrm{C}$ gives

Give structures and names of the principal organic products expected from the monosulfonation of:

salicylaldehyde $\left(o-{\mathrm{HOC}}_6{\mathrm{H}}_4\mathrm{CHO}\right)$

Phenol can be distinguished from ethanol by the reactions with _____.

What is the action of following reagent on phenol?

Concentrated sulphuric acid at room temperature.

What is the action of following reagent on phenol?

Dilute nitric acid at room temperature.

Name the reagent used to convert phenol into o-Phenolsulphonic acid.

Name the reagent used to convert Phenol into $2,4,6$-Tribromophenol.

Explain the following reaction of phenol.

Kolbe's reaction.

Explain the following reaction of phenol.

Reimer-Tiemann reaction. 

Explain the following:

o-Nitrophenol is more acidic than o-Cresol.

Explain the following:

Phenol is more acidic than ethanol.

Which is stronger acid in the following pair ?

$2$-Nitrophenol and $2,4,6$-Trinitrophenol