Question

The reaction that does NOT take place in a blast furnace between 900K to 1500K temperature range during extraction of iron is:

• A. \( {Fe}_2{O}_3 + {CO} \rightarrow 2 {FeO} + {CO}_2 \)
• B. \( {FeO} + {CO} \rightarrow {Fe} + {CO}_2 \)
• C. \( {C} + {CO}_2 \rightarrow 2 {CO} \)
• D. \( {CaO} + {SiO}_2 \rightarrow {CaSiO}_3 \)

Hint:

In a blast furnace, carbon monoxide is the main reducing agent used to reduce iron oxides to iron. The reactions typically involve multiple steps to progressively reduce \( {Fe}_2{O}_3 \) to iron.

Answer 1

The Correct Option is A

The extraction of iron from its ore (typically hematite \( {Fe}_2{O}_3 \)) in a blast furnace involves reduction reactions at high temperatures. The following reactions occur in the blast furnace: 
- Reaction B: \( {FeO} + {CO} \rightarrow {Fe} + {CO}_2 \) This is the reduction of iron(II) oxide to iron, which is a key reaction in the extraction of iron
- Reaction C: \( {C} + {CO}_2 \rightarrow 2 {CO} \) This reaction represents the formation of carbon monoxide, which is an essential reducing agent in the blast furnace. |
- Reaction D: \( {CaO} + {SiO}_2 \rightarrow {CaSiO}_3 \) This reaction forms calcium silicate (slag), which helps remove impurities like silica from the iron ore. 
- Reaction A: \( {Fe}_2{O}_3 + {CO} \rightarrow 2 {FeO} + {CO}_2 \) This reaction does not occur under typical blast furnace conditions. 
The temperature in the blast furnace is not high enough to reduce \( {Fe}_2{O}_3 \) directly to \( {FeO} \). 
The reduction of \( {Fe}_2{O}_3 \) typically occurs in multiple steps, and this reaction does not take place as written. 
Thus, the correct answer is (A).