Q. What is the charge in Pb02 and Pb(OH)3-
P b O 2     P b O H 3 -

In PbO2, charge of Pb is +4 , O is -2. Molecule is neutral.
In Pb(OH)3, Pb is +2. 
As Pb is more stable in +2,  easy oxidation of PbO2 occurs.

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