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Question

When $$PbO_{2}$$ reacts with concentrated $$HNO_{3}$$, 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 $$O_{2}$$
$$PbO_2$$ is a powerful oxidising agent and liberate $$O_2$$ when treated with conc. $$HNO_3$$.

$$PbO_{2} + conc. HNO_{3}\rightarrow Pb(NO_{3})_{2} + H_{2}O + O_{2}$$.

Hence, option B is correct.

Chemistry
NCERT
Standard XII

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