A) \[F{{e}_{2}}{{O}_{3}}(s)+3CO(g)\to 2Fe(l)+3C{{O}_{2}}(g)\]
B) \[CaC{{O}_{3}}(s)\to CaO(s)+C{{O}_{2}}(g)\]
C) \[CaO\left( s \right)+Si{{O}_{2}}\left( s \right)\to CaSi{{O}_{3}}\left( s \right)\]
D) \[2C\left( s \right)+{{O}_{2}}\left( g \right)\to 2CO\left( g \right)\]
Correct Answer: C
Solution :
[c] In blast furnace at about 1270 K, calcium carbonate is almost completely decomposed to give \[CaO\] which acts as a flux and combines with \[Si{{O}_{2}}\] present as impurity (gangue) in the ore to form calcium silicate (fusible slag) \[\underset{\left( basic\text{ }flux \right)}{\mathop{CaO(s)}}\,+\underset{\left( acidic\text{ }flux \right)}{\mathop{Si{{O}_{2}}(s)}}\,\xrightarrow{{}}\underset{\left( slag \right)}{\mathop{CaSi{{O}_{3}}(s)}}\,\]
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