Q. The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.
A) CaO(s) + SiO₂(s) → CaSiO₃(s)
B) 2C(s) + O₂(g) → 2CO(g)
C) Fe₂O₃(s) + 3CO(g) → 2Fe(l) + 3CO₂(g)
D) CaCO₃(s) → CaO(s) + CO₂(g)
Explanation
[Solution from source] Slag is the fusible calcium silicate made when the flux CaO combines with the silica gangue: CaO + SiO₂ → CaSiO₃. Decomposition of limestone only supplies CaO, the carbon reaction makes the CO reducing agent, and Fe₂O₃ + 3CO is the reduction step. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.