KCET 2014 Chemistry Solved Paper

Potassium Superoxide react with water to produce potassium hydroxide, hydrogen peroxide and oxygen. This reaction takes place at a temperature near 0°C. Whereas, other metal oxide reacts with water but does not produce peroxide.
Reaction of other metal
CaO+H2O→Ca(OH)2
Li2O+H2O→2LiOH