Assertion ( A ) : The colour of old lead paintings can be restored by washing them with a dilute solution of H 2 O 2 . Reason ( R ) : Hydrogen peroxide reduces PbS to Pb

Question

Aicharya · Accepted Answer

The colour of old lead paintings can be restored by washing them with a dilute solution of $H_{2} O_{2}$ . The reaction is given below i.e.

$\underset{Litharge}{PbO} \overset{H_{2} S}{\to} \underset{Black}{PbS} \overset{H_{2} O_{2}}{\to} \underset{White}{{PbSO}_{4}}$

Here, hydrogen peroxide acts as oxidising agent because oxidation state of sulphur changes from $- 2$ to $+ 6$ so $PbS$ is oxidised to ${PbSO}_{4}$ .

So, Assertion is true while reason is false.

Assertion ( A ) : The colour of old lead paintings can be restored by washing them with a dilute solution of…

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