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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_(2)O_(2)`

D

`MnO_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
`H_(2)O_(2)`. The key reactions are
`PbO+underset("Black")(H_(2)S) to PbS + H_(2)O`
`PbS +4H_(2)O_(2) to underset("White")(PbSO_(4))+4H_(2)O`
When blackened statues are treated with `H_(2)O_(2)`, the PbS is oxidised to `PbSO_(4)` which is colourless (white)
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