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Q.

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

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a

MnO2

b

CsO2

c

Na2O2

d

BaO2

answer is A.

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Detailed Solution

MnO2 does not contain a peroxo linkage, it cannot give H2O2

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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