Question

Sulphide ores of metals are usually concentrated by Froth Flotation process. Which one of the following sulphide ores offers and exception and is concentrated by chemical leaching?

• A. Sphalerite
• B. Argentite
• C. Galena
• D. Copper pyrite

Answer 1

The correct option is B Argentite

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 $C{N}^{-}$

Option B is correct.