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Sulphide ores of the metals are usually concentrated by froth floatation process. Which of the following sulphide ores offers an exception and is conc

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Sulphide ores of the metals are usually concentrated by froth floatation process. Which of the following sulphide ores offers an exception and is concentrated by chemical leaching ?
A. Galena
B. Copper pyrite
C. Sphalerite
D. Argentite.
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Correct Answer - D
Argentite `(Ag_(2)S)` an ore of silver metal is concentrated by the leaching and the process is known as Mac-Arthur and Forest process.
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