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

Options

A. `CO_(2)` is more volatile than `CS_(2)`
B. Metal sulphides are thermodynamically more stable than `CS_(2)`
C. `CO_(2)` is thermodynamically more stable than `CS_(2)`
D. Metal sulphides are less stable than the correcponding oxides.

Answer

B

Explanation

Metal sulphides reduction with carbon is not possible since `Delta_(f) G^(Ө)` for the reaction is not compensated.