Which of the following substituted phenols is | vedclass

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

Question

(B) The acidity of substituted phenols depends on the electronic effects of the substituent groups attached to the benzene ring. Electron-withdrawing

Vedclass · Accepted Answer

$p$-nitrophenol

Vedclass · Answer

(B) The acidity of substituted phenols depends on the electronic effects of the substituent groups attached to the benzene ring. Electron-withdrawing groups $(EWG)$ increase acidity by stabilizing the phenoxide ion through $-I$ and $-R$ effects. Electron-donating groups $(EDG)$ decrease acidity by destabilizing the phenoxide ion through $+I$ and $+R$ effects. In the given options: $(A)$ $-CH_3$ is an $EDG$ ($+I$ and hyperconjugation). $(B)$ $-NO_2$ is a strong $EWG$ ($-I$ and $-R$ effects). $(C)$ $-OCH_3$ is an $EDG$ ($+R$ effect dominates over $-I$). $(D)$ $-C_2H_5$ is an $EDG$ ($+I$ effect). Since $-NO_2$ is the only strong electron-withdrawing group among the choices,$p$-nitrophenol is the strongest acid.

Which of the following substituted phenols is the strongest acid?

Similar Questions

Which of the following is a trihydric phenol?

Which of the following compounds is most reactive in electrophilic aromatic substitution?

By which reaction is anisole obtained from phenol?

Which reaction is used to make salicylic acid from phenol?

Phenol gives characteristic colouration with

Vedclass Test Series

Exam Paper Generator

Online Exam Module