The increasing order of acidic strength among | vedclass

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

Question

(C) The acidic strength of substituted benzoic acids depends on the electronic effects of the substituents attached to the benzene ring.$1.$ Electron-

Vedclass · Accepted Answer

$IV < I < II < III$

Vedclass · Answer

(C) The acidic strength of substituted benzoic acids depends on the electronic effects of the substituents attached to the benzene ring.$1.$ Electron-donating groups $(EDG)$ like $-OCH_3$ (methoxy group) decrease the acidity by destabilizing the carboxylate anion. Thus,$4-$methoxybenzoic acid $(IV)$ is the weakest acid.$2.$ Electron-withdrawing groups $(EWG)$ like $-NO_2$ (nitro group) increase the acidity by stabilizing the carboxylate anion through $-I$ and $-M$ effects.$3.$ Benzoic acid $(I)$ has no substituent. $4-$nitrobenzoic acid $(II)$ has one $-NO_2$ group,and $3, 4-$dinitrobenzoic acid $(III)$ has two $-NO_2$ groups.$4.$ Since $III$ has two electron-withdrawing groups,it is more acidic than $II$.Therefore,the increasing order of acidic strength is: $IV < I < II < III$.

The increasing order of acidic strength among the following compounds is
$I.$ Benzoic acid
$II.$ $4-$nitrobenzoic acid
$III.$ $3, 4-$dinitrobenzoic acid
$IV.$ $4-$methoxybenzoic acid

Similar Questions

$N, N$-Dimethylacetamide is formed by the reaction of which of the following?

The major product formed in the following reaction is
$C_6H_5CH=CH_2$ $\xrightarrow[(ii) H_3O^+]{(i) KMnO_4, KOH, \Delta}$ $\xrightarrow{(iii) Br_2/FeBr_3} \text{Product}$

What are $X$ and $Y$ in the following set of reactions?

Rearrange the following in the increasing order of acidic strength:
$(i)$ benzoic acid $(ii)$ $p$-methoxybenzoic acid $(iii)$ $o$-methoxybenzoic acid

Corrosive sublimate $(HgCl_{2})$ can be used to distinguish between

Vedclass Test Series

Exam Paper Generator

Online Exam Module

The increasing order of acidic strength among the following compounds is$I.$ Benzoic acid$II.$ $4-$nitrobenzoic acid$III.$ $3, 4-$dinitrobenzoic acid$IV.$ $4-$methoxybenzoic acid