What are substituent effect on benzene ring?

Substituent effects on a benzene ring refer to how different chemical groups attached to the ring can influence its reactivity and physical properties. Electron-donating groups like alkyl or hydroxyl groups can increase the electron density on the ring, making it more reactive, while electron-withdrawing groups like nitro or carbonyl groups can decrease electron density, reducing reactivity. Substituents can also impact the orientation of incoming electrophiles in electrophilic aromatic substitution reactions.