Class 12 Chemistry Metallurgy General Principles and Processes of Isolation of Elements
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150 Pb is a very important element of carbon family. It forms a number of compounds which are very useful in industries. The process of removal of base metals (Cu, Sn, Bi, As) from lead is called:
(a)
softening process
(b)
liquation
(c)
parke's process
(d)
cupellalion
Correct answer: (a)
Solution: For the removal of base metals the impure bullion is charged to a softening furnace whereby oxidation these elements form drosses or slags and, with some lead, are skimmed from the bath. This is the softening process.
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general principles and processes of isolation of elements
metallurgical operations
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