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Question

The species that do not contain peroxide ion (s) is/are :

A
PbO2
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B
SrO2
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C
Na2O2
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D
BaO2
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Solution

The correct option is A PbO2

Metallic oxides which on treatment with dilute acids produce hydrogen peroxide are called peroxides.

All peroxides contain a peroxide ion (O2)2having the structure OO . PbO2 does not contain a peroxide ion (O2)2 and it can not be called as peroxides.

PbO2 contains O2 ions and Option (A) Pb is +4, whereas (B), (C) and (D) contains [OO]2 ions (peroxide ions). Thus Option A is correct.


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