The correct acidity order of the following co | vedclass

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Question

(A) The compounds are: $(I)$ Phenol,$(II)$ $4$-chlorophenol,$(III)$ Benzoic acid,$(IV)$ $4$-methylbenzoic acid.$1$. Carboxylic acids are significantly

Vedclass · Accepted Answer

$III > IV > II > I$

Vedclass · Answer

(A) The compounds are: $(I)$ Phenol,$(II)$ $4$-chlorophenol,$(III)$ Benzoic acid,$(IV)$ $4$-methylbenzoic acid.$1$. Carboxylic acids are significantly more acidic than phenols due to the resonance stabilization of the carboxylate anion compared to the phenoxide ion.$2$. Comparing $(III)$ and $(IV)$: $(III)$ is benzoic acid. In $(IV)$,the $-CH_3$ group is an electron-donating group (via inductive and hyperconjugation effects),which destabilizes the carboxylate anion,making $(IV)$ less acidic than $(III)$. Thus,$III > IV$.$3$. Comparing $(I)$ and $(II)$: $(II)$ is $4$-chlorophenol. The $-Cl$ atom is an electron-withdrawing group (via inductive effect),which stabilizes the phenoxide ion,making $(II)$ more acidic than $(I)$. Thus,$II > I$.$4$. Combining these,the overall order of acidity is $III > IV > II > I$.Therefore,option $A$ is correct.

The correct acidity order of the following compounds is:

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