A) \[F{{e}_{2}}{{O}_{3}}+3CO\xrightarrow[{}]{{}}2Fe+3C{{O}_{2}}\]
B) \[FeO+Si{{O}_{2}}\xrightarrow[{}]{{}}FeSi{{O}_{3}}\]
C) \[F{{e}_{2}}{{O}_{3}}+3C\xrightarrow[{}]{{}}2Fe+3CO\]
D) \[CaO+Si{{O}_{2}}\xrightarrow[{}]{{}}CaSi{{O}_{3}}\]
Correct Answer: A
Solution :
\[F{{e}_{2}}{{O}_{3}}+3C\xrightarrow[{}]{{}}2Fe+3CO,\]reaction does occur in the blast furnace at temperatures above 1123 K when almost all the\[F{{e}_{2}}{{O}_{3}}\]has already been reduced to Fe. Hence, it is not the main reaction.\[CaC{{O}_{3}}\]decomposes around 1123 K to give\[CaO\].Since, below this temperature,\[~FeO\]has already been reduced to Fe. So,\[~FeO\]does not combine with\[Si{{O}_{2}}\]to form slag,\[FeSi{{O}_{3}}\]. Main reactions which occur in the blast furnace are \[F{{e}_{2}}{{O}_{3}}+3CO\xrightarrow[{}]{{}}2Fe+3C{{O}_{2}}\] \[CaO+Si{{O}_{2}}\xrightarrow[{}]{{}}CaSi{{O}_{3}}\]
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