Question

Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide lons.

Answer 1

$O-,p-$ nitrophenol are more acidic than phenol because of fact that $N{O}_2$ is best electron with drawing group.Electron with drawing groups increase acidic strength while electron donating groups decreases acidic strength.

Refer to image 01

Similarly for $p-$nitrophenol resonating structures.

Refer to image 02.