• # question_answer60)   Nitric acid is an oxidising agent and reacts with $\text{PbO}$but it does not react with$~\text{Pb}{{\text{O}}_{\text{2}}}$. Explain why?

In $Pb{{O}_{2}}$, lead is in its max. oxidation state (+4) hence it will not react with oxidising agent $HN{{O}_{3}}$. However, $PbO$being basic oxide will form salt with$HN{{O}_{3}}$. $\underset{Base}{\mathop{PbO}}\,+\underset{Acid}{\mathop{2HN{{O}_{3}}}}\,\to \underset{Salt}{\mathop{Pb{{(N{{O}_{3}})}_{2}}}}\,+{{H}_{2}}O$