Identify one statement that does not hold true for electrorefining of copper

Options

A. Electrolyte is acidified `CuSO_(4)` solution
B. Cathode is a thin strip of impure copper
C. Anode dissolves in the electrolyte
D. Anode gets thicker

Explanation

To solve the question, "Identify one statement that does not hold true for electrorefining of copper," we can follow these steps:

### Step-by-Step Solution:

1. **Understand Electrorefining**:
- Electrorefining is a process used to purify metals, in this case, copper. It involves an electrolytic cell with an anode (impure copper) and a cathode (pure copper).

2. **Identify Components**:
- The anode is made of impure copper, which will dissolve into the electrolyte.
- The cathode is a thin strip of pure copper where the copper ions will deposit.

3. **Electrolyte Used**:
- The electrolyte is typically an acidified copper sulfate solution (CuSO4), which helps to increase the conductivity of the solution.

4. **Electrochemical Reactions**:
- At the anode, oxidation occurs where impure copper dissolves, releasing copper ions into the solution.
- At the cathode, reduction occurs where copper ions from the solution gain electrons and deposit as pure copper.

5. **Analyze the Statements**:
- **Statement 1**: "Electrolyte is acidified copper sulfate solution." - This is true.
- **Statement 2**: "Cathode is a thin strip of impure copper." - This is false; the cathode is a thin strip of pure copper.
- **Statement 3**: "Anode dissolves in the electrolyte." - This is true; the anode does dissolve.
- **Statement 4**: "Anode gets thicker." - This is false; the anode actually gets thinner as it dissolves.

6. **Conclusion**:
- The statements that do not hold true are: "Cathode is a thin strip of impure copper" and "Anode gets thicker." However, since the question asks for one statement, we can choose either one.

### Final Answer:
The statement that does not hold true for electrorefining of copper is: **"Cathode is a thin strip of impure copper."**