Question

Lead obtained from galena ore (PbS) by air reduction or carbon reduction process contains base metal (Cu, Bi, As, Sn, Zn) as impurities. The removal of the impurity of Ag from the commercial lead is called:

• A. desilverization of lead
• B. softening process
• C. Bett's electrulysis
• D. cupellation

Answer 1

The correct option is A desilverization of lead

The removal of Ag impurities from commercial lead is called desilverization of lead. Parke's process is used for desilverization of argentiferous lead (PbS + 0.01 to 1 % Ag) and is based on distribution principle.

Hence, the correct option is (A).