1.

Assertion:- The colour of old lead paintings can be restored by washing with dilute solution of `H_(2)O_(2)` Reason:- Black lead sulphide is oxidised by `H_(2)O_(2)` to white lead sulphate.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is False.D. If both Assertion & Reason are False.

Answer» Correct Answer - A
Old oil paintings contain PbO which becomes black due to formation of PbS.
`underset("black")(PbS)+4H_(2)Orarrunderset("white")(PbSO_(4))`


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