Question

When $Pb{O}_2$ reacts with conc. $HN{O}_3$, the gas evolved is:

• A. $N{O}_2$
• B. $O_2$
• C. $N_2$
• D. $N_{2}O$

Answer 1

The correct option is B $O_2$

$Pb{O}_2$ is a powerful oxidising agent and liberates $O_2$ when treated with acids.

$2Pb{O}_2+4HN{O}_3⟶2Pb(N{O}_3{)}_2+2H_{2}O+O_2$