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Lead obtained form galena (PbS) by air r...

Lead obtained form galena `(PbS)` by air reduction or carbon reduction process contains base metal `(Cu, Bi, Sn, As)` as impurities, due to the which lead becomes hard and brittle.
`Zn-Ag` alloy formed in the upper layer of molten lead is skimmed off from the surface of the molten lead by perforated ladles. This alloy contains lead as impurity. This impurity of `Pb` is removed by

A

Distillation

B

Cupellation

C

Liquation

D

Bett's electrolysis

Text Solution

Verified by Experts

The correct Answer is:
C
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