The correct order of decreasing acid strength | vedclass

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(A) The acid strength of carboxylic acids is determined by the stability of the carboxylate anion formed after the loss of a $H^+$ ion.Electron-withdr

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$B > A > D > C$

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(A) The acid strength of carboxylic acids is determined by the stability of the carboxylate anion formed after the loss of a $H^+$ ion.Electron-withdrawing groups ($-I$ effect) stabilize the carboxylate anion,thereby increasing the acidity.Electron-donating groups ($+I$ effect) destabilize the carboxylate anion,thereby decreasing the acidity.Comparing the substituents:$CF_3-$ (trifluoroacetic acid,$B$) has a stronger $-I$ effect than $CCl_3-$ (trichloroacetic acid,$A$) due to the higher electronegativity of fluorine.Formic acid ($D$,$HCOOH$) has no alkyl group,while acetic acid ($C$,$CH_3COOH$) has a methyl group which exerts a $+I$ effect.Therefore,the order of decreasing acid strength is $CF_3COOH (B) > CCl_3COOH (A) > HCOOH (D) > CH_3COOH (C)$.

The correct order of decreasing acid strength of trichloroacetic acid $(A)$,trifluoroacetic acid $(B)$,acetic acid $(C)$,and formic acid $(D)$ is

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