Phenol is more acidic than:

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

Question

(D) The methoxy group $(-OCH_3)$ exerts a $+I$ effect and $+M$ effect. The $+I$ effect increases the electron density on the oxygen atom of the $-OH$

Vedclass · Accepted Answer

Both $(a)$ and $(c)$

Vedclass · Answer

(D) The methoxy group $(-OCH_3)$ exerts a $+I$ effect and $+M$ effect. The $+I$ effect increases the electron density on the oxygen atom of the $-OH$ group,which destabilizes the phenoxide ion and decreases the acidity of phenol.$o-$Methoxy phenol is less acidic than phenol due to the electron-donating nature of the methoxy group.Acetylene $(C_2H_2)$ is a terminal alkyne with a $pK_a$ of approximately $25$,whereas phenol has a $pK_a$ of approximately $10$. Thus,phenol is significantly more acidic than acetylene.$p-$Nitrophenol is more acidic than phenol due to the strong $-I$ and $-M$ effects of the nitro group,which stabilize the phenoxide ion.

Similar Questions

The functional group that can be identified through the phthalein dye test is:

Which of the following is most acidic?

In phenol,electrophilic substitution reaction mainly occurs at which of the following positions?

What is the $IUPAC$ name of hydroquinone?

Phenol $\xrightarrow{Zn \, \text{dust}} X$ $\xrightarrow[Anhyd. \, AlCl_3]{CH_3Cl} Y$ $\xrightarrow{\text{Alkaline } KMnO_4} Z$. In the above reaction,what is $Z$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module