Which of the following alcohols is expected t | vedclass

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(C) The acidic strength of an alcohol is inversely proportional to its $pK_a$ value. Stronger electron-withdrawing groups ($-I$ effect) increase the a

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$2, 2, 2$-trifluoroethanol

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(C) The acidic strength of an alcohol is inversely proportional to its $pK_a$ value. Stronger electron-withdrawing groups ($-I$ effect) increase the acidity by stabilizing the conjugate base (alkoxide ion). Comparing the groups: $1$. Ethanol: $-CH_2CH_3$ (electron-donating group). $2$. $1$-propanol: $-CH_2CH_2CH_3$ (electron-donating group). $3$. $2$-chloroethanol: $-CH_2CH_2Cl$ ($-I$ effect of $Cl$). $4$. $2, 2, 2$-trifluoroethanol: $-CH_2CF_3$ (strong $-I$ effect of three $F$ atoms). Since the $-I$ effect of three fluorine atoms is much stronger than that of one chlorine atom,$2, 2, 2$-trifluoroethanol is the most acidic and thus has the lowest $pK_a$ value.

Which of the following alcohols is expected to have the lowest $pK_a$ value?

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