Black lead is

What do you observe when : Black lead sulphide is heated.

Ozone reacts with Black lead sulphide to give a product "A" the change in oxidation number of S in this reaction is

Identify the type of reactions on the basis of following observations: Black lead sulphide is heated in presence of O_2 and turns into white lead sulphate.

Assertion (A) : The colour of old lead painting can be restored by washing with dilute solution of H_2O_2 . Reason (R) : Black lead sulphide is oxidised by H_2O_2 to white lead suphate.

Assertion:- The colour of old lead paintings can be retored 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.

Assertion (A) : The colour of old lead painting can be restored by washing with dilute solution of H_2O_2 . Reason (R) : Black lead sulphide is oxidised by H_2O_2 to white lead suphate.

Write down the reaction of Ozone with black lead sulphide.

Why does ozone ( 0_3 ) acts as a powerful oxidising agent ? Give examples black lead sulphide.