Question -
Answer -
The nitro-group is an electron-withdrawinggroup. The presence of this group in the ortho position decreases the electrondensity in the OтИТH bond. As a result, it is easier to lose a proton. Also,the┬аo-nitrophenoxide ion formed after the loss of protons isstabilized by resonance. Hence,┬аortho┬аnitrophenol is astronger acid.
On the other hand, methoxy group is an electron-releasinggroup. Thus, it increases the electron density in the OтИТH bond and hence, theproton cannot be given out easily.