Sodium chloride solution conducts electricity due to the presence of

Options

A. Free electrons
B. Free ions
C. Free molecules
D. Atoms of sodium and chlorine

Answer

To solve the question, "Sodium chloride solution conducts electricity due to the presence of," we can break down the explanation into clear steps:

### Step-by-Step Solution:

1. **Understanding Sodium Chloride (NaCl) in Water**:
- When sodium chloride (NaCl) is dissolved in water, it dissociates into its constituent ions: sodium ions (Na⁺) and chloride ions (Cl⁻).
- This process is known as ionization.

2. **Role of Ions in Conductivity**:
- The presence of these free-moving ions (Na⁺ and Cl⁻) in the solution is essential for electrical conductivity.
- In a solution, these ions can move freely, allowing them to carry electric charge.

3. **Conductivity Mechanism**:
- When an electric current is applied to the solution, the positive sodium ions (Na⁺) migrate towards the negative electrode (cathode), while the negative chloride ions (Cl⁻) move towards the positive electrode (anode).
- This movement of ions constitutes the flow of electric current.

4. **Conclusion**:
- Therefore, the conductivity of sodium chloride solution is due to the presence of free ions (Na⁺ and Cl⁻) that can move and carry electric charge through the solution.

### Final Answer:
Sodium chloride solution conducts electricity due to the presence of **free ions**.

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