A) Cuprous sulphide
B) Cuprous oxide
C) Ferrous oxide
D) Ferrous sulphide
Correct Answer: C
Solution :
\[\underset{\text{Impurity}}{\mathop{FeO}}\,+\underset{\text{Flux}}{\mathop{Si{{O}_{2}}}}\,\to \underset{\text{Slag}}{\mathop{FeSi{{O}_{3}}}}\,\]
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