Nitriding is a process of heating steel in an atmosphere of

When an alloy of silver and lead is rich in silver,which process is used for purification?

Electric refining is used for refining of

Silver obtained from argentiferous lead containing lead impurity is purified by

In electrorefining of metals,the anode and cathode are taken as a thick slab of impure metal and a strip of pure metal,respectively,while the electrolyte is a solution of a complex metal salt. This method cannot be applied for the refining of:

Which metal is refined by Mond process?