First slide

Hydrogen Peroxide

Question

All the following can give hydrogen peroxide when they react with water except

Moderate

A

${PbO}_{2}$
B

${KO}_{2}$
C

${Na}_{2} O_{2}$
D

${BaO}_{2}$

Solution

${PbO}_{2}$ does not contain a peroxo linkage, it cannot give $H_{2} O_{2}$ .
Option 2- superoxide; Option 3,4- peroxides;
Super oxides react with water to give hydroxide, hydrogen peroxide and oxygen;
Peroxides react with water to give hydroxide and hydrogen peroxide;

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