( I ) Fluorine exhibits only -1 oxidation state

( II ) Fluorine is called super halogen

It contains seven electrons in the valence shell ,hence it requires one electron to complete it’s octet .Thus by gaining one electron it shows -1 oxidation state

Fluorine is the most reactive of all the halogens. It combines directly with other elements except oxygen and some of the noble gases. Hence fluorine is called super halogen element.