A) \[C{{u}_{2}}S\]gets converted to \[C{{u}_{2}}O\]if temperature is below \[800{}^\circ C\]
B) \[C{{u}_{2}}S\] gets converted to\[C{{u}_{2}}S\]if temperature is above\[800{}^\circ C\]
C) FeS remains unaffected and gets converted to FeO only at temperature above \[1000{}^\circ C\]
D) \[FeSi{{O}_{3}}\]is formed and removed.
Correct Answer: B
Solution :
[b]: is correct as very high energy is required for the conversion of CuS to CuO. It follows is wrong. is wrong as FeS gets converted to FeO even at low temperature below \[800{}^\circ C\]. is wrong as \[FeSi{{O}_{3}}\]is formed at \[1400{}^\circ C\] during smelting and not during roasting.
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