JEE Mains Model Paper 5

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Question : 32 of 90

Marks: +1, -0

H2O2 restores the colour of old lead paintings, blackened by the action H2S gas,by

converting PbO2 to Pb
by oxidizing PbS to PbSO4
converting PbCO3 to Pb
oxidizing PbSO3 to PbSO4

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