What is the reaction of p nitrophenol with hydrochloric acid?

When p-nitrophenol reacts with hydrochloric acid, it undergoes protonation of the phenolic hydroxyl group, resulting in the formation of the corresponding p-nitrophenol protonated species. This reaction can be represented as:

p-nitrophenol + HCl ➝ p-nitrophenol-H+ + Cl-.