question_answer

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

A)                 Carbon and hydrogen are suitable reducing agents for metal sulphides

B)                 The \[{{\Delta }_{f}}{{G}^{o}}\] of the sulphide is greater than those for \[C{{S}_{2}}\] and \[{{H}_{2}}S\]  

C)                  The \[{{\Delta }_{f}}{{G}^{o}}\] is negative for roasting of sulphide ore to oxide  

D)                  Roasting of the sulphide to the oxide is thermodynamicaliy feasible