The pH of 0.001 N sodium hydroxide solution at `25^(@)C` is

Options

A. 3
B. 4
C. 11
D. 12

Explanation

To find the pH of a 0.001 N sodium hydroxide (NaOH) solution at 25°C, we can follow these steps:

### Step 1: Understand the dissociation of NaOH
Sodium hydroxide is a strong base and completely dissociates in water:
\[ \text{NaOH} \rightarrow \text{Na}^+ + \text{OH}^- \]

### Step 2: Determine the concentration of hydroxide ions
Given that the normality of the NaOH solution is 0.001 N, and since NaOH completely dissociates, the concentration of hydroxide ions \([\text{OH}^-]\) is:
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