The electrical conductivity of a solution of acetic acid will be `…………………` if a solution of sodium hydroxide is added.

Explanation

To solve the question regarding the electrical conductivity of a solution of acetic acid when sodium hydroxide is added, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Nature of Acetic Acid:**
- Acetic acid (CH₃COOH) is a weak electrolyte. This means it does not dissociate completely in solution, resulting in a low concentration of ions (H⁺ and CH₃COO⁻).

2. **Understand the Effect of Adding Sodium Hydroxide:**
- Sodium hydroxide (NaOH) is a strong electrolyte. It dissociates completely in solution to give Na⁺ and OH⁻ ions.

3. **Reaction Between Acetic Acid and Sodium Hydroxide:**
- When NaOH is added to the acetic acid solution, a neutralization reaction occurs:
\[ \text{CH}_3\text{COOH} + \text{NaOH} \rightarrow \text{CH}_3\text{COONa} + \text{H}_2\text{O} \]
- This reaction produces sodium acetate (CH₃COONa) and water.

4. **Dissociation of Sodium Acetate:**
- Sodium acetate is a salt formed from a weak acid and a strong base. In solution, it dissociates completely into its ions:
\[ \text{CH}_3\text{COONa} \rightarrow \text{CH}_3\text{COO}^- + \text{Na}^+ \]

5. **Effect on Electrical Conductivity:**
- The presence of more ions (CH₃COO⁻ and Na⁺) in the solution increases the overall electrical conductivity. Since acetic acid alone contributes fewer ions, the addition of NaOH significantly increases the number of ions in the solution.

6. **Conclusion:**
- Therefore, the electrical conductivity of the acetic acid solution will be **more** when sodium hydroxide is added.

### Final Answer:
The electrical conductivity of a solution of acetic acid will be **more** if a solution of sodium hydroxide is added.