A) \[F{{e}_{2}}{{O}_{3}}(s)+3\,CO(g)\to 2\,Fe(1)+3\,C{{O}_{2}}(g)\]
B) \[CaC{{O}_{3}}(s)\to CaO(s)+C{{O}_{2}}(g)\]
C) \[CaO(s)+Si{{O}_{2}}(s)\to CaSi{{O}_{3}}(s)\]
D) \[2C(s)+{{O}_{2}}(g)\to 2\,CO(g)\]
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) CaO(s) (basic flux) \[+Si{{O}_{2}}\] (s) (acidic flux)\[\xrightarrow{{}}CaSi{{O}_{3}}\](s)(slag)
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