In galvanic cell, the salt bridge is used to

Options

A. Complete the circuit
B. Reduce the electric resistance in the cell
C. Separate cathode from anode
D. Carry salts for the chemical reaction

Explanation

**Step-by-Step Solution:**

1. **Understanding the Galvanic Cell**: A galvanic cell consists of two half-cells: an anode (where oxidation occurs) and a cathode (where reduction occurs). These half-cells are connected by a salt bridge.

2. **Role of the Salt Bridge**: The primary function of the salt bridge is to maintain electrical neutrality within the half-cells. As the redox reactions occur, ions are produced, which can lead to a buildup of charge in each half-cell.

3. **Completing the Circuit**: The salt bridge allows ions to flow between the two half-cells, which helps to complete the electrical circuit. This flow of ions is essential for the continuous operation of the galvanic cell.

4. **Reducing Electric Resistance**: By allowing the flow of ions, the salt bridge helps to reduce the electric resistance in the cell, facilitating the movement of electrons through the external circuit.

5. **Separation of Electrodes**: The salt bridge also serves to physically separate the anode and cathode, preventing the mixing of the different solutions that could lead to unwanted side reactions.

6. **Conclusion**: Therefore, the salt bridge is crucial for maintaining the function of a galvanic cell by completing the circuit, maintaining electrical neutrality, and allowing for the flow of ions.

**Final Answer**: The salt bridge in a galvanic cell is used to complete the circuit and maintain electrical neutrality.

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