Identify the reaction that does not take place in a blast furnace

Options

A. `2Fe_(2)O_(3) + 3C rarr 4Fe + 3CO_(2)`
B. `CO_(2) + C rarr 2CO`
C. `CaCO_(3) rarr CaO + CO_(2)`
D. `FeO + SiO_(2) rarr FeSiO_(3)`

Answer

To identify the reaction that does not take place in a blast furnace, we need to understand the processes that occur within the furnace during the extraction of iron. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Purpose of a Blast Furnace
The blast furnace is primarily used for the extraction of iron from its ores, specifically iron oxides like hematite (Fe2O3) and magnetite (Fe3O4). The main reactions involve the reduction of these oxides to iron.

**Hint:** Recall that the blast furnace is used for extracting metals, particularly iron, from their ores.

### Step 2: Identify Common Reactions in a Blast Furnace
In a blast furnace, several reactions occur:
- The reduction of iron oxides by carbon monoxide (CO).
- The formation of carbon dioxide (CO2).
- The calcination of calcium carbonate (CaCO3) to produce calcium oxide (CaO) and carbon dioxide (CO2).
- The formation of slag, which is a byproduct of the reaction between impurities in the ore and flux (like limestone).

**Hint:** Think about the main chemical processes involved in the extraction of iron and the role of carbon and limestone.

### Step 3: Analyze the Given Reaction
The reaction given in the question is:
\[ \text{Fe}_2\text{O}_3 + 4\text{C} \rightarrow 4\text{Fe} + 3\text{CO}_2 \]
This reaction represents the reduction of iron oxide (Fe2O3) using carbon (C) to produce iron (Fe) and carbon dioxide (CO2).

**Hint:** Look closely at the stoichiometry and the reactants/products of the reaction to determine if it fits within the typical reactions of a blast furnace.

### Step 4: Determine if the Reaction Occurs in the Blast Furnace
While the reduction of iron oxides does occur in the blast furnace, the specific reaction provided (with the stoichiometry given) does not occur in the blast furnace as written. Instead, the reduction typically occurs with carbon monoxide (CO) rather than directly with carbon (C) in a solid state.

**Hint:** Consider the conditions inside the blast furnace and the state of the reactants involved.

### Step 5: Conclusion
Based on the analysis, the reaction:
\[ \text{Fe}_2\text{O}_3 + 4\text{C} \rightarrow 4\text{Fe} + 3\text{CO}_2 \]
does not take place in the blast furnace as it is not the typical reduction pathway for iron oxides in this context.

Thus, the reaction that does not take place in a blast furnace is the one involving the direct reduction of iron oxide with solid carbon.

**Final Answer:** The reaction that does not take place in a blast furnace is the reduction of iron oxide with carbon (Fe2O3 + 4C → 4Fe + 3CO2).