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 the statements provided regarding galvanic and electrolytic cells and determine which one is correct.

### Step-by-Step Solution:

1. **Understanding Galvanic Cells:**
- In a galvanic cell, chemical energy is converted into electrical energy.
- The anode is the negative terminal, and the cathode is the positive terminal.
- Reactions in galvanic cells are spontaneous and do not require an external voltage source.

2. **Understanding Electrolytic Cells:**
- In an electrolytic cell, electrical energy is converted into chemical energy.
- The anode is the positive terminal, and the cathode is the negative terminal.
- Reactions in electrolytic cells are non-spontaneous and require an external voltage source.

3. **Analyzing the Statements:**
- **Statement 1:** "Cathode is negative terminal both in galvanic and electrolytic cells."
- This is incorrect. The cathode is positive in galvanic cells.
- **Statement 2:** "Anode is negative terminal both in galvanic and electrolytic cells."
- This is incorrect. The anode is positive in electrolytic cells.
- **Statement 3:** "Cathode is negative terminal in electrolytic cells and anode is negative terminal in galvanic cells."
- This is incorrect. The anode is positive in galvanic cells.
- **Statement 4:** "Cathode and anode respectively are negative and positive terminal respectively means the cathode is first, so this is the value of cathode first and anode is later, so this is positive, and galvanic and electrolytic cell respectively."
- This statement is confusing but essentially incorrect as it mixes up the definitions.

4. **Identifying the Correct Statement:**
- The correct understanding is that:
- In a galvanic cell: Anode (negative) and Cathode (positive).
- In an electrolytic cell: Anode (positive) and Cathode (negative).
- Therefore, the correct statement based on the analysis is:
- "Cathode is negative terminal in electrolytic cells and anode is negative terminal in galvanic cells" is incorrect.
- The correct answer is that the cathode is negative in electrolytic cells, and the anode is negative in galvanic cells.

### Conclusion:
The correct answer to the question is **Statement 3**: "Cathode is negative terminal in electrolytic cells and anode is negative terminal in galvanic cells."