KEAM 2011 Physics and Chemistry Paper

On hydrolysis, alkali metal oxides give the corresponding metallic hydroxides.
Li2O+H2O⟶2LiOH
Na2O+H2O⟶2NaOH
The peroxides of alkali metals give the corresponding metallic hydroxide and H2O2
Whereas, the superoxide's of alkali metals give the corresponding metallic hydroxide, H2O2 and O2
Be(OH)2 cannot be prepared by hydrolysis of BeO, as it is insoluble in water.