A) \[Cu+S{{O}_{2}}\]
B) \[Cu+S{{O}_{3}}\]
C) \[CuO+CuS\]
D) \[C{{u}_{2}}S{{O}_{3}}\]
Correct Answer: A
Solution :
\[C{{u}_{2}}S+2C{{u}_{2}}O\to 6Cu+S{{O}_{2}}\] (Auto-reduction). This reaction occurs in reverberatory furnace to get metallic copper.
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