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

p-cresol reacts with chloroform in alkaline medium to give the compound $\mathrm{A}$ which adds hydrogen cyanide to form the compound$\mathrm{B}$ . The latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid is –

The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is –

Which compound having maximum value of $\mathrm{pKa}$ from following?

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.

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

 (P)

How many hydrogen atom(s) is/are present in precipitate $\left(\mathrm{P}\right)$ ?

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 $\_\_\_\_\_\_\_\_\_$