Which of the following factors is of no significance for roasting sulphide ores to the oxides an....

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Which of the following factors is of no significance
\( \mathrm{P} \)
for roasting sulphide ores to the oxides and not subjecting the sulfide ores to carbon reduction directly?
(1) Metal sulfides are thermodynamically more stable than \( \mathrm{CS}_{2} \)
(2) \( \mathrm{CO}_{2} \) is thermodynamically more stable than \( \mathrm{CS}_{2} \)
(3) Metal sulphides are less stable than the corresponding oxides
(4) \( \mathrm{CO}_{2} \) is more volatile than \( \mathrm{CS}_{2} \)


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