Which one of the following compounds is most | vedclass

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(B) The acidity of a compound is determined by the stability of its conjugate base. Electron-withdrawing groups $(EWG)$ stabilize the phenoxide ion by

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o-Nitrophenol

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(B) The acidity of a compound is determined by the stability of its conjugate base. Electron-withdrawing groups $(EWG)$ stabilize the phenoxide ion by dispersing the negative charge through $-I$ (inductive) and $-R$ (resonance) effects,thereby increasing acidity. $NO_2$ is a strong electron-withdrawing group. In $o$-nitrophenol,the $-NO_2$ group is present at the ortho position,which exerts a strong $-I$ and $-R$ effect,making it the most acidic among the given options. Therefore,$o$-nitrophenol is the most acidic compound.

Which one of the following compounds is most acidic?

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