Nitric acid is an oxidising agent and reacts with PbO but it does not react with Pb${{O}_{2}}$. Explain why?
PbO is a base. It reacts with nitric acid and forms soluble lead nitrate.
PbO + 2 ${ NH }{ 3 }$ --------->
Pb${ (NO3) }{ 2 }$ +
${ H }{ 2 }O$
Nitric acid does not reacts with ${{PbO}{2}}$. Both of them are strong oxidising agents. In
${{HNO}{3}}$, nitrogen is in its maximum oxidation state (+ 5) and in
${{PbO}{2}}$, lead is in its maximum oxidation state (+4). Therefore, no reaction takes place.