A) hot blast of air
B) carbon monoxide
C) carbon
D) silica
Correct Answer: B
Solution :
In the blast furnace iron oxide is reduced as : \[3F{{e}_{2}}{{O}_{3}}+CO\xrightarrow{300-{{400}^{o}}C}2F{{e}_{3}}{{O}_{4}}+C{{O}_{2}}\] \[F{{e}_{3}}{{O}_{4}}+CO\xrightarrow{500-{{600}^{o}}C}3FeO+C{{O}_{2}}\] \[FeO+CO\xrightarrow{{{700}^{o}}C}Fe+C{{O}_{2}}\]
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