A) \[2FeS+3\,{{O}_{2}}\to 2\,FeO+2\,S{{O}_{2}}\uparrow \]
B) \[C{{u}_{2}}O+FeS\to C{{u}_{2}}S+FeO\]
C) \[2C{{u}_{2}}S+3\,{{O}_{2}}\to 2C{{u}_{2}}O+2S{{O}_{2}}\uparrow \]
D) \[FeO+Si{{O}_{2}}\to FeSi{{O}_{3}}\]
Correct Answer: C
Solution :
\[2C{{u}_{2}}S+3{{O}_{2}}\to 2C{{u}_{2}}O+2S{{O}_{2}}\uparrow \]
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