# IUPAC naming of quinol and hydroquinone

This is benzene-1,4-diol. Its common name is quinol and hydroquinone. How is hydroquinone an accepted name since the functional group here is an alcohol and not a ketone? Is this the only such case or does it apply elsewhere too?

This is benzene-1,2,4-triol also known as hydroxyquinol. How does the position of alcohol influence the name of the compound here?

• In a way, yes, alcohols are formed by adding $\ce{H2}$ to a ketone. – Pritt says Reinstate Monica Mar 27 '18 at 10:41