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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