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Blackened oil painting can be restored i...

Blackened oil painting can be restored into original form by the action of

A

Chlorine

B

`BaO_2`

C

`H_2O_2`

D

`MnO_2`

Text Solution

Verified by Experts

The correct Answer is:
C
`H_2O_2` . The key reactions are
`PbO+underset("Black")(H_2S)rarrPbS+H_2O`
`PbS +4H_2O_2rarrunderset("White")(PbSO_4)+4H_2O`
When blackened statues are treated with `H_2O_2`, the PbS is oxidised to `PbSO_4` , which is colourless (White) .
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