Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly?

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${CO}_{2}$ is more volatile than ${CS}_{2}$

Metal sulphides are thermodynamically more stable than ${CS}_{2}$ .

Metal sulphide are less stable than the corresponding oxides

${CO}_{2}$ is thermodynamically more stable than ${CS}_{2}$

answer is B.

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Detailed Solution

Metal sulphides are less stable than the corresponding oxides. Because there is no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly.

Because metal sulphides are more stable than metal oxides, it is challenging to separate metal from its sulphide. As a result, metal sulphides are first transformed into oxides before being removed.

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