Select the correct statement

Options

A. Cathode is negative terminal, both in galvanic and electrolytic cells
B. Anode is negative terminal, both in galvanic and electrolytic cells
C. Cathode is negative terminal in electrolytic cell and anode is negative terminal in galvanic cell
D. Cathode and anode respectively are negative and positive terminal in galvanic and electrolytic cell respectively.

Answer

To solve the question, we need to analyze each statement regarding the characteristics of galvanic and electrolytic cells. Let's break it down step by step.

### Step 1: Understand the Definitions
1. **Galvanic Cell**: A device that converts chemical energy into electrical energy. In a galvanic cell:
- **Anode**: Negative terminal (oxidation occurs here).
- **Cathode**: Positive terminal (reduction occurs here).
- **Electron Flow**: From anode to cathode.

2. **Electrolytic Cell**: A device that converts electrical energy into chemical energy. In an electrolytic cell:
- **Anode**: Positive terminal (oxidation occurs here).
- **Cathode**: Negative terminal (reduction occurs here).
- **Electron Flow**: From cathode to anode.

### Step 2: Analyze Each Statement
1. **Statement 1**: "Cathode is negative terminal both in galvanic and in electrolytic cell."
- **Analysis**: This is incorrect. The cathode is positive in a galvanic cell.

2. **Statement 2**: "Anode is negative terminal both in galvanic and electrolytic cell."
- **Analysis**: This is incorrect. The anode is positive in an electrolytic cell.

3. **Statement 3**: "Cathode is negative terminal in electrolytic cell and anode is negative terminal in galvanic cell."
- **Analysis**: This is partially correct. The cathode is indeed negative in an electrolytic cell, but the anode is not negative in a galvanic cell; it is positive. Therefore, this statement is incorrect.

4. **Statement 4**: "Cathode and anode respectively are negative and positive terminal in galvanic and in electrolytic cell respectively."
- **Analysis**: This is incorrect. The cathode is positive in a galvanic cell and negative in an electrolytic cell.

### Step 3: Conclusion
After analyzing all statements, we find that:
- **Correct Statement**: None of the statements are completely correct. However, Statement 3 has a correct part regarding the electrolytic cell but is incorrect about the galvanic cell.

### Final Answer
The correct option is **none of the statements are entirely correct**.