Copper Matte is extracted from copper pyrites ore by heating it in blast furnace. The method is based on the principle that:

Options

A. Iron has more affinity for oxygen than copper at high temperature.
B. Sulphur has less afficity for oxygen at high temperature.
C. Sulphur has more affinity for oxygen at high temperature.
D. Copper has less afficity for oxygen than sulphur at high temperature.

Answer

To solve the question regarding the extraction of copper matte from copper pyrites ore in a blast furnace, we need to understand the principles behind the process. Here’s a step-by-step breakdown:

### Step 1: Understanding the Extraction Process
Copper matte is produced from copper pyrites (CuFeS2) through a series of reactions in a blast furnace. The extraction involves heating the ore at high temperatures.

**Hint:** Focus on the chemical reactions involved in the extraction process.

### Step 2: Identifying the Affinities of Elements
The extraction method is based on the principle that different elements have varying affinities for oxygen at high temperatures. Specifically:
- Copper (Cu) has a higher affinity for oxygen compared to sulfur (S).
- Sulfur has a lower affinity for oxygen at high temperatures.

**Hint:** Consider how the affinities of copper and sulfur for oxygen influence the reactions that occur.

### Step 3: Chemical Reactions Involved
The main reactions that take place during the extraction are:
1. \( \text{Cu}_2\text{S} + \text{O}_2 \rightarrow \text{Cu}_2\text{O} + \text{SO}_2 \)
2. \( \text{Cu}_2\text{O} + \text{Cu}_2\text{S} \rightarrow \text{Cu} + \text{SO}_2 \)

These reactions show how copper sulfide (Cu2S) reacts with oxygen to form copper(I) oxide (Cu2O) and sulfur dioxide (SO2).

**Hint:** Write down the balanced equations to understand the stoichiometry of the reactions.

### Step 4: Analyzing the Affinities
From the reactions, we can deduce that:
- Copper is more likely to react with oxygen than sulfur, which indicates that copper has a higher affinity for oxygen than sulfur at high temperatures.

**Hint:** Compare the affinities of copper and sulfur based on the reactions and their products.

### Step 5: Conclusion
Based on the analysis:
- The method of extracting copper matte from copper pyrites is based on the principle that sulfur has less affinity for oxygen than copper at high temperatures.

### Final Answer
The correct answer is that sulfur has less affinity for oxygen at high temperature.

**Hint:** Review the options provided in the question to identify which statements align with the principles discussed.