Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Which one of the following reactions occurs during smelting in the reduction zone at lower temperature (in iron metallurgy)?
A
CaO + SiO2 
CaSiO3 (slag)
CaSiO3 (slag)
B
Fe2O3 + 3C 
2Fe + CO
2Fe + CO
C
3Fe2O3 + CO 
2Fe3O4 + CO2
2Fe3O4 + CO2
D
CO2 + C 
2CO
2CO
Text Solution
Verified by ExpertsThe correct answer is:
C
At lower temperature following reactions occur in blast furnace.
3Fe2O3 + CO 
2Fe3O4 + CO2 ; Fe3O4 + CO 
3Fe + 4CO2 ; Fe2O3 + CO 
2FeO + CO2
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