Which one is a nonelectrolyte ?

Options

A. Liquid carbon tetrachloride
B. Acetic acid
C. Sodium hydroxide solution
D. Potassium chloride

Answer

To determine which of the given substances is a nonelectrolyte, we need to analyze each option based on their ability to conduct electricity.

### Step-by-Step Solution:

1. **Understanding Electrolytes and Nonelectrolytes**:
- Electrolytes are substances that dissociate into ions when dissolved in water, allowing them to conduct electricity.
- Nonelectrolytes do not dissociate into ions and therefore do not conduct electricity.

2. **Analyzing the Options**:
- **Liquid Carbon Tetrachloride (CCl₄)**:
- Carbon tetrachloride is a covalent compound. It does not dissociate into ions when dissolved in water or in its liquid state. Therefore, it cannot conduct electricity.
- **Acetic Acid (CH₃COOH)**:
- Acetic acid is a weak acid that partially dissociates into ions (CH₃COO⁻ and H⁺) in solution. Hence, it can conduct electricity, making it an electrolyte.
- **Sodium Hydroxide (NaOH) Solution**:
- Sodium hydroxide is a strong base that completely dissociates into Na⁺ and OH⁻ ions in solution. This allows it to conduct electricity, classifying it as an electrolyte.
- **Potassium Chloride (KCl)**:
- Potassium chloride is an ionic compound that dissociates into K⁺ and Cl⁻ ions in solution. It can conduct electricity, thus it is also an electrolyte.

3. **Conclusion**:
- Among the options provided, **Liquid Carbon Tetrachloride (CCl₄)** is the only substance that does not dissociate into ions and therefore is classified as a nonelectrolyte.

### Final Answer:
Liquid Carbon Tetrachloride (CCl₄) is a nonelectrolyte.