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General Principles And Processes of Isolation Of Elements
Question
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Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching?

  • Argentite

  • Galena

  • Copper pyrite

  • Sphalerite

Answer

D.

Sphalerite

galena (Pbs), Copper pyrite (CuFeS2) and argentite (Ag2S) are concentrated by froth flotation process but sphalerite (ZnS) is concentrated by chemical leching.

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