Question

The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction corresponding to the formation of the slag.

• A. \( Fe_2O_3 (s) + 3CO (g) \rightarrow 2Fe (s) + 3CO_2 (g) \)
• B. \( CaO(s) + SiO_2(s) \rightarrow CaSiO_3 (s) \)
• C. \( CaO (s) + CO_2 (g) \rightarrow CaCO_3 (s) \)
• D. \( Fe_3O_4 (s) + CO (g) \rightarrow Fe_2O_3 (s) + 3CO_2 (g) \)

Hint:

The slag is formed by combining basic oxides (like \( CaO \)) with acidic oxides (like \( SiO_2 \)).

Answer 1

The Correct Option is B

The slag in the blast furnace is formed by the reaction between calcium oxide (\( CaO \)) and silicon dioxide (\( SiO_2 \)), forming calcium silicate. This is the key reaction that forms the slag.

Step 2: Conclusion.
The reaction that forms the slag is \( CaO(s) + SiO_2(s) \rightarrow CaSiO_3 (s) \), corresponding to option (b).