Blister copper is refined by stirring moltem impure metal with green logs of wood because such a wood liberated hydrocarbon gases like `(CH_(4))`. The process X is called _____ and the Metal contains impurity of Y is ____:

Options

A. X=cupellation, `Y=CuO_(2)`
B. X=polling, `Y=Cu_(2)O`
C. X=polling, Y= CuO
D. X=cupellation, Y=CuO

Answer

To solve the question regarding the refining of blister copper, we need to identify the process and the type of impurity present in the metal.

### Step-by-Step Solution:

1. **Understanding Blister Copper**:
- Blister copper is an intermediate product in the extraction of copper, which contains a significant amount of impurities, primarily copper oxides.

2. **Identifying the Process**:
- The refining of blister copper involves stirring molten impure metal with green logs of wood. This is done to introduce hydrocarbon gases like methane into the molten metal.
- The process that involves this method is known as **polling**. In polling, the wood acts as a reducing agent, helping to reduce the copper oxides present in the blister copper to pure copper.

3. **Identifying the Impurity**:
- The primary impurity in blister copper is **cuprous oxide**, which is represented as \( \text{Cu}_2\text{O} \). This oxide needs to be reduced to obtain pure copper.

4. **Final Answer**:
- Therefore, the process X is called **polling**, and the metal contains impurity Y, which is **cuprous oxide (Cu₂O)**.

### Summary:
- Process X: **Polling**
- Impurity Y: **Cuprous oxide (Cu₂O)**