What is the chemical reaction depicted in the image?

Chemical Reaction:

The image depicts the reaction of 1-chloro-4-nitrobenzene with potassium hydroxide (KOH).

The chemical formula shown is:

1-chloro-4-nitrobenzene + 2KOH → 4-nitrophenol + 2KCl + H₂O

This is a nucleophilic aromatic substitution reaction where the chlorine atom on the benzene ring is replaced by a hydroxyl group from KOH.