A) \[2FeS+3{{O}_{2}}\xrightarrow{{}}2FeO+3S{{O}_{2}}\uparrow \]
B) \[C{{u}_{2}}O+FeS\xrightarrow{{}}C{{u}_{2}}S+FeO\]
C) \[2C{{u}_{2}}S+3{{O}_{2}}\xrightarrow{{}}2C{{u}_{2}}O+2S{{O}_{2}}\uparrow \]
D) \[FeO+Si{{O}_{2}}\xrightarrow{{}}FeSi{{O}_{3}}\]
Correct Answer: A
Solution :
The reaction\[2FeS+3{{O}_{2}}\xrightarrow{{}}2FeO+2S{{O}_{2}}\uparrow \]occurs during roasting of pyrites ore. Roasting is the process of heating concentrated ore in the stream of air to convert it into oxide.
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