Which of the following compounds gives a pink | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The reaction of phenols with phthalic anhydride in the presence of concentrated $H_2SO_4$ is a condensation reaction that forms phthalein dyes. Fo

Vedclass · Accepted Answer

$2-$propylphenol

Vedclass · Answer

(A) The reaction of phenols with phthalic anhydride in the presence of concentrated $H_2SO_4$ is a condensation reaction that forms phthalein dyes. For a phenol to form a phthalein dye (which shows a pink colour in basic medium),it must have a free para-position relative to the hydroxyl $(-OH)$ group to allow for the electrophilic aromatic substitution $(EAS)$ by the phthalic anhydride intermediate. In $2$-propylphenol,the para-position is free,allowing the reaction to proceed to form the corresponding phthalein derivative,which turns pink upon treatment with $NaOH$.

Which of the following compounds gives a pink colour on reaction with phthalic anhydride in conc. $H_2SO_4$ followed by treatment with $NaOH$?

Similar Questions

Phenol $\xrightarrow{Br_2 / H_2O}$ Product formed is

The major product of the following reaction is:

Which among the following is the strongest $o, p-$directing group?

Assertion : Phenol is a stronger acid than ethanol.
Reason : Groups with $+M$ effect decrease acidity at $p-$position.

The major product in the following reaction is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module