Nitric acid is an oxidising agent and reacts with pbo but it does not react with Pbo_(2) expain why ?

Nitric acid is an oxidising agent and reacts with pbo but it does not

1.	Nitric acid is an oxidising agent and reacts with pbo but it does not react with Pbo_(2) expain why ?
Answer» SOLUTION :Since in `PbO_(2)` Pbisin the maximum oxidation STATE of +4 and in `HNO_(3)` N is in the maximum oxidation state of +5 therefore none of them can oxidation each other in other words `PbO_(2)` is passive towards `HNO_(3.)` and hence no reaction occurs in contrast PbO being BASIC undergoes an acid base reactionto form `PB(NO_(3))_(2)` and `H_(2)O PbO+2 HNO_(3) rarrPb(NO_(3))_(2)+H_(2)O`