An electrolyte is :

Options

A. a metal
B. a solution
C. a liquid that conducts current
D. all of above

Answer

**Step-by-Step Text Solution:**

1. **Definition of Electrolyte**: An electrolyte is a substance that can conduct electricity when dissolved in water or melted. This is because it dissociates into ions, which are charged particles that can move freely and carry electric current.

2. **Forms of Electrolytes**: Electrolytes can exist in different forms:
- **Solid Electrolytes**: Some metals can act as electrolytes when they are in a molten state.
- **Liquid Electrolytes**: Most commonly, electrolytes are found in liquid solutions, such as saltwater, where ionic compounds dissolve in water.
- **Aqueous Solutions**: Many electrolytes are ionic compounds that dissolve in water to form a solution that conducts electricity.

3. **Conductivity Mechanism**: When an electrolyte is dissolved in water, it dissociates into positive and negative ions. These ions are free to move, allowing the solution to conduct electricity. The movement of these ions is what allows electric current to flow through the solution.

4. **Applications of Electrolytes**: Electrolytes are used in various applications, including:
- **Electrolysis**: A process that uses an electric current to drive a chemical reaction, often used in electroplating and the extraction of metals.
- **Batteries**: Electrolytes are crucial in batteries, where they facilitate the flow of ions between the electrodes.

5. **Conclusion**: Therefore, an electrolyte can be defined as a substance, typically a solution, that conducts electricity due to the movement of ions when it is dissolved in a solvent, usually water.