Which of the following compounds has the high | vedclass

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(C) The acidity of carboxylic acids is determined by the stability of the conjugate base (carboxylate ion).Electron-withdrawing groups (EWGs) stabiliz

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$CCl_3COOH$

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(C) The acidity of carboxylic acids is determined by the stability of the conjugate base (carboxylate ion).Electron-withdrawing groups (EWGs) stabilize the carboxylate ion through the inductive effect ($-I$ effect),thereby increasing the acidity and the $K_a$ value.Comparing the substituents:$1$. $NO_2$ group has a strong $-I$ effect.$2$. $Br$ group has a moderate $-I$ effect.$3$. $CCl_3$ group has a very strong $-I$ effect due to three highly electronegative chlorine atoms.$4$. $CH_3$ group is an electron-donating group ($+I$ effect),which decreases acidity.Among the given options,$CCl_3COOH$ has the strongest electron-withdrawing effect,making it the strongest acid with the highest $K_a$ value.

Which of the following compounds has the highest $K_a$ value?

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