The order of acidic strength of the following | vedclass

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Question

(A) The acidic strength depends on the stability of the conjugate base formed after the loss of a proton.$(i)$ is $4$-ethylcyclohexanecarboxylic acid

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$(iii) > (ii) > (i)$

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(A) The acidic strength depends on the stability of the conjugate base formed after the loss of a proton.$(i)$ is $4$-ethylcyclohexanecarboxylic acid (aliphatic).$(ii)$ is $4$-methoxybenzoic acid (aromatic with $+R$ effect of $-OCH_3$ group).$(iii)$ is $4$-nitrobenzoic acid (aromatic with $-R$ effect of $-NO_2$ group).$1$. Aromatic carboxylic acids are generally stronger than aliphatic carboxylic acids due to the resonance stabilization of the carboxylate anion by the benzene ring.$2$. The $-NO_2$ group in $(iii)$ exerts a strong $-R$ (electron-withdrawing) effect,which stabilizes the carboxylate anion and significantly increases acidity.$3$. The $-OCH_3$ group in $(ii)$ exerts a $+R$ (electron-donating) effect,which destabilizes the carboxylate anion and decreases acidity compared to benzoic acid,but it is still more acidic than the aliphatic acid $(i)$ due to the aromatic ring.Therefore,the order of acidic strength is $(iii) > (ii) > (i)$.

The order of acidic strength of the following acids is:

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