When NaCI is dissolved in water, the sodium ion is-

Options

A. Reduced
B. Oxidised
C. Hydrated
D. Hydrolysed

Answer

To solve the question "When NaCl is dissolved in water, the sodium ion is-," we can follow these steps:

### Step 1: Understand the Dissolution Process
When sodium chloride (NaCl) is added to water, it dissociates into its constituent ions. This means that NaCl separates into sodium ions (Na⁺) and chloride ions (Cl⁻).

### Step 2: Identify the Behavior of Sodium Ions
In the presence of water, the sodium ions do not undergo any oxidation or reduction reactions. Instead, they interact with water molecules.

### Step 3: Define Hydration
The process where water molecules surround and interact with ions is called hydration. This is crucial for the stability of the ions in solution.

### Step 4: Conclusion
Since the sodium ions (Na⁺) are surrounded by water molecules when NaCl is dissolved, we conclude that the sodium ion is hydrated.

### Final Answer
Thus, the correct answer is that the sodium ion is **hydrated** when NaCl is dissolved in water.

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