When an acid cell is charged, then

Options

A. Voltage of cell increases
B. Electrolyte of cell dilutes
C. Resistance of cell increases
D. None of these

Answer

To solve the question "When an acid cell is charged, then what happens?", we will analyze the options provided and determine the correct answer step by step.

### Step 1: Understanding the charging process of an acid cell
When an acid cell (like a lead-acid battery) is charged, electrical energy is supplied to the cell, which causes a chemical reaction to occur. This reaction converts the reactants back into their original forms, allowing the cell to store energy.

### Step 2: Analyzing the effects of charging
1. **Voltage of the cell increases**: As the acid cell is charged, the chemical reactions that occur lead to an increase in the potential difference (voltage) across the terminals of the cell. This is because the concentration of reactants increases, which enhances the electrochemical potential.

2. **Electrolyte of the cell dilutes**: During charging, the concentration of the electrolyte (sulfuric acid in a lead-acid battery) can actually change. However, it is more common for the electrolyte to become more concentrated as the products of the charging reaction are formed.

3. **Resistance of the cell increases**: The resistance of the cell does not necessarily increase during charging. In fact, the resistance may decrease as the cell becomes more fully charged and the electrolyte becomes more conductive.

4. **None of these**: This option would only be correct if none of the previous statements were true.

### Step 3: Conclusion
Based on the analysis, the most accurate statement is that the voltage of the cell increases when an acid cell is charged.

### Final Answer
**The voltage of the cell increases.**

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