Slag formed during smelting process in the extraction of Fe (from haematite) and Cu (from copper pyrites) are respectively

Options

A. Both `CaSiO_(3)`
B. Both `FeSiO_(3)`
C. `CaSiO_(3) and FeSiO_(3)`
D. `FeSiO_(3) and CaSiO_(3)`

Explanation

To determine the slag formed during the smelting process in the extraction of iron from haematite and copper from copper pyrites, we can follow these steps:

### Step 1: Understand the Process of Smelting
Smelting is a process that involves heating ores to extract metals. During this process, impurities are removed, and they often combine with flux materials to form slag.

**Hint:** Smelting involves both the extraction of metal and the removal of impurities.

### Step 2: Identify the Ore for Iron Extraction
The ore used for extracting iron is haematite, which has the chemical formula Fe₂O₃.

**Hint:** Remember the chemical formula of haematite as it is crucial for identifying the slag.

### Step 3: Identify the Flux Used in Iron Extraction
In the extraction of iron, limestone (CaCO₃) is used as a flux. When limestone is heated, it decomposes into calcium oxide (CaO) and carbon dioxide (CO₂).

**Hint:** Flux materials help to remove impurities by forming slag.

### Step 4: Determine the Reaction Involving Impurities
When calcium oxide reacts with silica (SiO₂), which is an impurity in the ore, it forms calcium silicate (CaSiO₃), which is the slag.

**Hint:** The reaction between calcium oxide and silica is key to forming the slag.

### Step 5: Identify the Slag for Iron
Thus, the slag formed during the extraction of iron from haematite is calcium silicate, represented by the formula CaSiO₃.

**Hint:** Focus on the product formed when calcium oxide reacts with silica.

### Step 6: Identify the Ore for Copper Extraction
The ore used for extracting copper is copper pyrites, which has the chemical formula CuFeS₂.

**Hint:** Knowing the chemical formula of copper pyrites is essential for the next steps.

### Step 7: Identify the Flux Used in Copper Extraction
In the extraction of copper, silica (SiO₂) is also used as a flux. During the smelting process, copper pyrites reacts with silica and oxygen.

**Hint:** The role of silica as a flux is similar to that in iron extraction.

### Step 8: Determine the Reaction Involving Impurities in Copper Extraction
When copper pyrites reacts with silica, iron (Fe) is present as an impurity and forms iron silicate (FeSiO₃) as slag.

**Hint:** The impurity from copper pyrites is iron, which combines with silica to form slag.

### Step 9: Identify the Slag for Copper
Thus, the slag formed during the extraction of copper from copper pyrites is iron silicate, represented by the formula FeSiO₃.

**Hint:** Remember that the slag for copper is formed from the iron impurity in the ore.

### Final Answer
The slag formed during the smelting process in the extraction of Fe from haematite is **CaSiO₃**, and for Cu from copper pyrites, it is **FeSiO₃**.