Electrode potential depends upon

Options

A. Size of electrode
B. Surface area of electrode
C. Temperature
D. Shape of electrode

Answer

To determine the factors on which electrode potential depends, we can analyze the question step by step:

### Step 1: Understanding Electrode Potential
Electrode potential is the measure of the tendency of a chemical species to be reduced or oxidized at an electrode. It is a crucial concept in electrochemistry, particularly in the functioning of electrochemical cells.

### Step 2: Identifying Factors Affecting Electrode Potential
Electrode potential is influenced by several factors, including:
1. **Concentration of the Reactants and Products**: The Nernst equation shows that the electrode potential is dependent on the concentration of the ions involved in the redox reaction.
2. **Temperature**: The temperature affects the kinetic energy of the molecules and can influence the reaction rate and equilibrium position, thereby affecting the electrode potential.
3. **Pressure**: For gas electrodes, the pressure of the gas can also influence the electrode potential.

### Step 3: Analyzing the Options
Given the options, we need to identify which factor is explicitly mentioned as affecting electrode potential:
- Option A: Concentration of the electrode
- Option B: Temperature
- Option C: Pressure
- Option D: None of the above

### Step 4: Selecting the Correct Answer
From our analysis, we can see that:
- Concentration and temperature are both factors that affect electrode potential.
- Pressure is also a factor, but it specifically applies to gas electrodes.

However, since the question asks for a general factor, the most straightforward and commonly recognized factor is **temperature**.

### Conclusion
Therefore, the correct answer is **Option B: Temperature**.

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