o-cresol < Phenol < o-nitrophenol.
NO2 o-nitrophenol becomes more acidic due to the presence of the electron-withdrawing group. The electron-releasing group in remaining reduces the acidic intensity.
o-cresol < Phenol < o-nitrophenol.
NO2 o-nitrophenol becomes more acidic due to the presence of the electron-withdrawing group. The electron-releasing group in remaining reduces the acidic intensity.