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A sulphide ore like ZnS is first roasted...

A sulphide ore like `ZnS` is first roasted into its oxide prior to reduction by carbon because:

A

A sulphide ore cannot be reduced to metal at all

B

no reducing agaent is found suitable for reducing a sulphide ore.

C

the Gibb's free energy of formation of most sulphides are greater than that for `CS_(2)`

D

a metal oxide is generally less stable than the metal sulphide

Text Solution

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The correct Answer is:
C
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