Which of the following statement is / are true for an electronchemical cell ?

Options

A. oxidation occurs at the anode only
B. reduction occurs at the anode only
C. oxidation occurs at both the anode and cathode
D. reduction occurs at both the anode and cathode

Explanation

To determine which statements are true for an electrochemical cell, we need to understand the basic principles of how these cells operate. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Components of an Electrochemical Cell
An electrochemical cell consists of two electrodes: the anode and the cathode. Each electrode is involved in different types of reactions.

### Step 2: Identify the Reactions at Each Electrode
- **Anode**: This is where oxidation occurs. Oxidation is defined as the loss of electrons.
- **Cathode**: This is where reduction occurs. Reduction is defined as the gain of electrons.

### Step 3: Analyze the Statements
Now, let's evaluate the statements provided in the question:
1. **Oxidation occurs at anode only**: This statement is true because oxidation is defined as the loss of electrons, which occurs at the anode.
2. **Reduction occurs at anode only**: This statement is false because reduction occurs at the cathode, not the anode.
3. **Oxidation occurs both**: This statement is false because oxidation only occurs at the anode.
4. **Reduction occurs both**: This statement is also false because reduction only occurs at the cathode.

### Step 4: Conclusion
Based on the analysis, the only true statement is:
- **Oxidation occurs at anode only**.

### Final Answer
The correct option is: **Oxidation occurs at anode only**.

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