pBlock ElementsII - Result Question 137

####22. Which gas is evolved when $PbO _2$ is treated with concentrated $HNO _3$ ?

(2005)

(a) $NO _2$

(b) $O _2$

(c) $N _2$

(d) $N _2 O$

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Solution:

  1. $PbO _2+HNO _3 \longrightarrow Pb\left(NO _3\right) _2+H _2 O+O _2$


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