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Extraction of Copper

Sulphide ores...

Question

Sulphide ores partially oxidized during roasting in the extraction of copper are :

A

M g S

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B

C u F e S_{2}

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C

C a S

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D

none of these

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Solution

The correct option is B $C u F e S_{2}$
In the roasting process, copper (sulfide ores such as chalcopyrite) is partially oxidised to produce calcine and sulfur dioxide gas.
${2 C u F e S}_{2} + {3 O}_{2} \to 2 F e O + 2 C u S + {2 S O}_{2}$

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