Choose the correct statement for galvanic cell

Options

A. Oxidation : cathode
B. Positive electrode : cathode
C. Flow of electron : cathode to anode
D. All are correct

Answer

To solve the question regarding the correct statement for a galvanic cell, let's analyze the options step by step.

### Step 1: Understand the Components of a Galvanic Cell
A galvanic cell consists of two electrodes: the anode and the cathode. The anode is where oxidation occurs, and the cathode is where reduction takes place.

### Step 2: Identify the Anode and Cathode
In a typical galvanic cell, such as the one formed by zinc and copper:
- The anode is where zinc (Zn) is oxidized to zinc ions (Zn²⁺).
- The cathode is where copper ions (Cu²⁺) are reduced to solid copper (Cu).

### Step 3: Analyze the Options
Now, let's evaluate each of the provided options:

1. **Oxidation occurs at cathode**: This statement is **incorrect**. Oxidation occurs at the anode, not the cathode.

2. **Positive electrode is cathode**: This statement is **correct**. In a galvanic cell, the cathode is indeed the positive electrode.

3. **Flow of electron is from cathode to anode**: This statement is **incorrect**. The flow of electrons is from the anode to the cathode.

4. **All are correct**: Since options 1 and 3 are incorrect, this statement is also **incorrect**.

### Step 4: Conclusion
The only correct statement among the options is that the positive electrode is the cathode.

### Final Answer
The correct statement for a galvanic cell is: **The positive electrode is the cathode.**

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