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General Principles and processes of Isolation of Elements
easy
Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching?
A
Sphalerite
B
Argentite
C
Galena
D
Copper pyrites
Solution
As Silver is a costly element, some of the ore stays in the bottom of the tub of froth flotation. So, loss occurs. So, it is extracted through leaching. Extraction of gold and silver involves leaching the metal with $\mathrm{CN}^{-}$
Option $\mathrm{B}$ is correct.
Standard 12
Chemistry
