Chemical Properties of Phenols

When sodium phenoxide is heated with carbon dioxide under pressure, sodium salicylate is obtained as major product. This on acidification given salicylic acid. This reaction is known as

​The electrophile involved in the above reaction is

​The electrophile involved in the above reaction is

The structure of the compound that gives a tribromo derivative on treatment with bromine water is –

The structure of the compound that gives a tribromo derivative on treatment with bromine water is

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.

Assertion: Phenol is more acidic than ethanol.
Reason: Phenoxide ion is resonance stabilized.

When phenol is treated with bromine water, the white precipitate formed is $\_\_\_$

The major product of the following reaction sequence is:

Write complete reaction for the bromination of phenol in aqueous and non aqueous medium.

The acid which contains both -OH and -COOH groups is

Which the following is the least acidic?

Which of the following functional group is formed when Phenol is made to react with Chloroform in the presence of dilute Sodium hydroxide?

$\mathrm{P}\mathrm{h}\mathrm{e}\mathrm{n}\mathrm{o}\mathrm{l}\mathrm{ }\begin{array}{c}\stackrel{\mathrm{i})\mathrm{ }\frac{\mathrm{C}\mathrm{H}\mathrm{C}{\mathrm{l}}_3}{\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}}}{\to }\\ \mathrm{i}\mathrm{i})\mathrm{ }{\mathrm{H}}^{+}\end{array}\mathrm{ }\mathrm{S}\mathrm{a}\mathrm{l}\mathrm{i}\mathrm{c}\mathrm{y}\mathrm{l}\mathrm{a}\mathrm{l}\mathrm{d}\mathrm{e}\mathrm{h}\mathrm{y}\mathrm{d}\mathrm{e}.$ This reaction is known as:

A compound $\left[\mathrm{A}\right]$, on treatment with excess ${\mathrm{NH}}_3$, gives $\left[\mathrm{B}\right]$ in the presence of ${\mathrm{ZnCl}}_2$ at $300°\mathrm{C}$. $\left[\mathrm{B}\right]$ on treatment with ${\mathrm{CHCl}}_3$ and $\mathrm{KOH}$, gives phenyl isocyanide. The diazonium salt from $\left[\mathrm{B}\right]$ gives $\left[\mathrm{C}\right]$ with ethanol. The incorrect option is

Acetoxy benzoic acid is commonly known as

The amount of bromine (atomic wt. $=80$) required (in gram) for the estimation of $42.3 \mathrm{g}$ of phenol (molecular wt. $=94 \mathrm{g} {\mathrm{mol}}^{-1}$) is $\_\_\_\_\_\_\_\_\_$

The reaction sequence,

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