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  4. When PbO2 reacts with concentrated HNO3 , the gas evolved is

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Q. When $PbO_{2}$ reacts with concentrated $HNO_{3}$ , the gas evolved is

NTA AbhyasNTA Abhyas 2022

Solution:

Here $O_{2}$ is released as follows
$2PbO_{2}+4HNO_{3} \rightarrow 2Pb\left(\right.NO_{3}\left(\left.\right)_{2}+2H_{2}O+O_{2}\uparrow$