Super Oxide:-

         A superoxide is a compound that contains the superoxide ion, which has the chemical formula O−2 The systematic name of the anion is dioxide(1−). The reactive oxygen ion superoxide is particularly important as the product of the one-electron reduction of Dioxygen O₂, which occurs widely in nature. Molecular oxygen (dioxygen) is a diradical containing two unpaired electrons, and superoxide results from the addition of an electron which fills one of the two degenerate molecular structure, leaving a charged ionic species with a single unpaired electron and a net negative charge of −1. Both dioxygen and the superoxide anion are free radicals that exhibit paramagnetism.
      Superoxide forms salts with alkali metals and alkaline earth metals. The salts CsO₂, RbO₂, KO₂, and NaO₂ are prepared by the reaction of O₂ with the respective alkali metal.
           The alkali salts of O−2 are orange-yellow in color and quite stable, provided they are kept dry. Upon dissolution of these salts in water, however, the   dissolved O−2 undergoes disproportionation.

           4 O₂^- + 2 H₂O → 3 O₂ + 4 OH⁻

    ^{When alkali metals K, Rb, Cs, etc are burn in oxygen, it gets superoxide.}    

             






            Normal oxides when react with H₂O, gives (OH^- ).

   


              But when superoxide reacts with H₂O. So, superoxide are used as strong oxidising agent.