Which of the following is not a non-electrolyte ?

Options

A. Acetic acid
B. Glucose
C. Ethanol
D. Urea

Answer

To determine which of the following substances is not a non-electrolyte, we need to analyze each option: acetic acid, glucose, ethanol, and urea.

### Step-by-Step Solution:

1. **Understanding Non-Electrolytes**:
- Non-electrolytes are substances that do not dissociate into ions when dissolved in water. They do not conduct electricity in their aqueous solution.

2. **Analyzing Acetic Acid**:
- Acetic acid (CH₃COOH) is a weak acid. When dissolved in water, it partially ionizes to form acetate ions (CH₃COO⁻) and hydrogen ions (H⁺).
- Therefore, acetic acid is **not** a non-electrolyte; it is an electrolyte.

3. **Analyzing Glucose**:
- Glucose (C₆H₁₂O₆) is a simple sugar and a covalent compound. When dissolved in water, it does not dissociate into ions.
- Thus, glucose is a non-electrolyte.

4. **Analyzing Ethanol**:
- Ethanol (C₂H₅OH) is an alcohol and is also a covalent compound. It does not dissociate into ions in solution.
- Therefore, ethanol is a non-electrolyte.

5. **Analyzing Urea**:
- Urea (NH₂CONH₂) is a small organic molecule that does not ionize in solution.
- Hence, urea is a non-electrolyte.

6. **Conclusion**:
- Among the options given, acetic acid is the only substance that is **not** a non-electrolyte, as it can ionize in solution. The other substances (glucose, ethanol, and urea) are non-electrolytes.

### Final Answer:
**Acetic Acid is not a non-electrolyte.**

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