Question

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

• A. $K{O}_2$
• B. ${Na}_2{O}_2$
• C. $CaO$
• D. ${Li}_{2}O$

Answer 1

The correct option is A $K{O}_2$

Potassium superoxide reacts with water as follows:

$2K{O}_2+2H_{2}O⟶2KOH+H_2{O}_2+O_2$