A) \[{{\operatorname{Fe}}_{2}}{{O}_{3}} + 3C \to \, 2Fe +3CO\]
B) \[\operatorname{C}{{O}_{2}}_+\,\,C\,\,\to \,\,2CO\]
C) \[\operatorname{FeO} + Si{{O}_{2}}\,\,\to \,\,FeSi{{O}_{3}}\]
D) \[\operatorname{CaO} + Si{{O}_{2}}\,\,\to \,\,CaSi{{O}_{3}}\]
Correct Answer: D
Solution :
In slag formation zone impurity is combined with flux to form slag \[\operatorname{CaO} + Si{{O}_{2}} \xrightarrow{{}} CaSi{{O}_{3}}\]
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