Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true gt

Options

A. the magnitude of `DeltaG_(f)^(@)` of the sulphide is greater than those for `CS_(2)` and `H_(2)S`
B. the `DeltaG_(f)^(@)` is negative for roasting of sulphide ore to oxide
C. roasting of the sulphide to the oxide is thermodynamically feasible
D. carbon and hydrogen are suitable reducing agents for metal sulphides

Answer

D