In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with

Options

A. FeS
B. CO
C. `Cu_(2)S`
D. `SO_(2)`

Explanation

To solve the question regarding the extraction of copper from its sulphide ore, we will follow these steps:

### Step 1: Identify the Ore
The primary ore for copper extraction is copper pyrite, which has the chemical formula \( \text{CuFeS}_2 \).

**Hint:** Remember that copper is primarily extracted from copper pyrite, which contains both copper and iron.

### Step 2: Roasting Process
In the extraction process, the first step is roasting the ore. During roasting, the copper pyrite is heated in the presence of oxygen, leading to the formation of copper(I) sulfide (\( \text{Cu}_2\text{S} \)) and iron sulfide (\( \text{FeS} \)), along with sulfur dioxide gas (\( \text{SO}_2 \)).

**Hint:** Roasting involves heating the ore in the presence of oxygen to convert it into a more manageable form.

### Step 3: Chemical Reaction During Roasting
The reaction during roasting can be represented as:
\[ 2 \text{CuFeS}_2 + 5 \text{O}_2 \rightarrow 2 \text{Cu}_2\text{S} + 2 \text{FeS} + 4 \text{SO}_2 \]

**Hint:** Pay attention to the products formed during roasting; they are essential for the next steps.

### Step 4: Reduction of Copper(I) Sulfide
After roasting, the next step involves the reduction of copper(I) sulfide (\( \text{Cu}_2\text{S} \)). This reduction typically occurs in a blast furnace where coke is used as a reducing agent.

**Hint:** The reducing agent is crucial in the reduction process; think about common substances used in metallurgy.

### Step 5: The Reduction Reaction
The reduction of \( \text{Cu}_2\text{S} \) can be represented by the following reaction:
\[ \text{Cu}_2\text{S} + \text{FeS} \rightarrow 2 \text{Cu} + \text{FeS}_2 \]
In this reaction, \( \text{Cu}_2\text{S} \) is reduced to metallic copper (\( \text{Cu} \)).

**Hint:** The reaction shows how the metal is extracted from its sulfide form; focus on the products.

### Step 6: Conclusion
Thus, in the extraction of copper from its sulphide ore, the metal is formed by the reduction of \( \text{Cu}_2\text{S} \) with iron sulfide (\( \text{FeS} \)).

**Final Answer:** The metal is formed by the reduction of \( \text{Cu}_2\text{S} \) with \( \text{FeS} \).