H_2O_2 restores the colour of old lead paintings , blackenedby the act – InterviewSolution

1.	H_2O_2 restores the colour of old lead paintings , blackenedby the action of H_2S gas, by :
Answer» CONVERTING `PbO_2` TO Pb By OXIDISING PBS to `PbSO_4` Converting `PbCO_3` to Pb Oxidising `Pbso_3` to `PbSO_4` ANSWER :B

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