Question

A metallic oxide reacts with water to form its hydroxide, hydrogen peroxide and also liberates oxygen. The metallic oxide could be

• A. $KO_2$
• B. $Na_2O_2$
• C. $CaO$
• D. $Li_2O$

Answer 1

Answer: (A)

$KO_2$

Answer 2

Potassium superoxide reacts with water as follows $2KO_2 + 2H_2O \to 2KOH + H_2O_2 + O_2$