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Question

When PbO2 reacts with conc HNO3, the gas evolved is:

A
NO2
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B
O2
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C
N2
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D
N2O
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Solution

The correct option is B O2
PbO2 when reacts with nitric acid, it gives Pb(NO3)2& water and giving out oxygen.

PbO2+2HNO3Pb(NO3)2+H2O+O2

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