Which of the following statements is wrong about galvanic cells?

Options

A. Cathode is the positive electrode
B. cathode is the negative electrode
C. electrons flow from cathode to anode in the external circuit
D. reduction occurs at cathode

Explanation

To determine which statement is wrong about galvanic cells, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Role of the Cathode:**
- In a galvanic cell, the cathode is defined as the electrode where reduction occurs. This means that it is the site where electrons are gained by the species present.

2. **Analyzing the Options:**
- **Option A:** "Cathode is a positive electrode."
- This statement is **true**. In a galvanic cell, the cathode is indeed the positive electrode because it attracts cations (positive ions) from the solution.

- **Option B:** "Cathode is a negative electrode."
- This statement is **false**. The cathode is not a negative electrode; it is the positive electrode in a galvanic cell.

- **Option C:** "Electron flow from cathode to anode in an external circuit."
- This statement is **false**. In a galvanic cell, electrons flow from the anode (negative electrode) to the cathode (positive electrode) in the external circuit. Therefore, this statement is incorrect.

- **Option D:** "Reduction occurs at cathode."
- This statement is **true**. As mentioned earlier, reduction occurs at the cathode where electrons are accepted.

3. **Conclusion:**
- The wrong statement about galvanic cells is **Option B**: "Cathode is a negative electrode."

### Final Answer:
The wrong statement about galvanic cells is **Option B: Cathode is a negative electrode.**