Question

Give a balanced reaction when lead oxide dissolves in nitric acid

Answer 1

There will be two different cases
First case is when nitric acid is dilute, :-
PbO+ HNO³--- Pb + H²O+ NO

Second case is when nitric acid is concentrated :-
PbO + HNO³---Pb + H²O + NO²

Answer 2

Pb3O4+4HNO3---2Pb (NO3)2+PbO2+2H2O