In the electrolytic refining of Cu

Options

A. Impure metal is made as anode and pure metaforme cathode
B. Impure metal foms cathode and pure metal forms anode
C. Pure metal forms both anode and cathode
D. Cu motal is not used as electrodes

Answer

### Step-by-Step Solution:

1. **Understanding Electrolytic Refining**:
- Electrolytic refining is a process used to purify metals, where an electric current is passed through a solution containing metal ions. The principle relies on oxidation and reduction reactions occurring at the electrodes.

2. **Identifying the Electrodes**:
- In the electrolytic refining of copper, the impure copper acts as the anode, while pure copper is deposited at the cathode.

3. **Oxidation at the Anode**:
- At the anode (impure copper), oxidation occurs. The impure copper metal loses electrons and dissolves into the electrolyte as copper ions (Cu²⁺).
- The reaction can be represented as:
\[ \text{Cu (s)} \rightarrow \text{Cu}^{2+} (aq) + 2e^- \]

4. **Reduction at the Cathode**:
- At the cathode, the copper ions in the solution gain electrons and are reduced to form pure copper metal, which gets deposited on the cathode.
- The reaction can be represented as:
\[ \text{Cu}^{2+} (aq) + 2e^- \rightarrow \text{Cu (s)} \]

5. **Conclusion**:
- Therefore, in the electrolytic refining of copper, the impure copper is used as the anode, and pure copper is formed at the cathode. Thus, the correct option is that the impure metal is made as anode and pure metal forms at cathode.

### Final Answer:
The correct option is **Option 1**: Impure metal is made as anode and pure metal forms at cathode.

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