A) smelting
B) calcination
C) roasting
D) distillation
Correct Answer: C
Solution :
\[2CuFe{{S}_{2}}+{{O}_{2}}\xrightarrow[{}]{Roasting}C{{u}_{2}}S+2FeS+S{{O}_{2}}\uparrow \] \[2C{{u}_{2}}S+3{{O}_{2}}\xrightarrow[{}]{{}}2C{{u}_{2}}O+2S{{O}_{2}}\uparrow \] \[2FeS+3{{O}_{2}}\xrightarrow[{}]{{}}2FeO+2S{{O}_{2}}\uparrow \]
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