NEET 2007 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)NEET 2007

Not in JEE Main or NEET syllabus

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?

(1)Sphalerite
(2)ArgentiteCorrect
(3)Galena
(4)Copper pyrite

Answer: (2)

Solution

Sphalerite (ZnS), galena (PbS) and copper pyrite () are concentrated by froth flotation. Argentite () is the exception: it is concentrated by chemical leaching (cyanide process,

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Question ID VK-089860