A) Argentite
B) Galena
C) Copper pyrite
D) Sphalerite
Correct Answer: D
Solution :
Galena\[(PbS),\]copper pyrite\[(CuFe{{S}_{2}})\]and argentite\[(A{{g}_{2}}S)\]are concentrated by froth floatation process but sphalerite\[(ZnS)\]is concentrated by chemical leaching.
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