Lead obtained form galena `(PbS)` by air reduction or carbon reduction process
Channel: Doubtnut
Date: 26/07/2020

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.  Cupellation is used for purification of