When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to

Options

A. ammoniated electron
B. sodium ion
C. sodium amide
D. ammoniated sodium ion

Explanation

**Step-by-Step Solution:**

1. **Understanding the Reaction**: When sodium (Na) is dissolved in liquid ammonia (NH3), a chemical reaction occurs. Sodium reacts with ammonia to form ammoniated ions and ammoniated electrons.

2. **Identifying the Products**: The products of this reaction can be represented as:
- Ammoniated cation: \( \text{Na(NH}_3\text{)}_x^+ \)
- Ammoniated electrons: These are free electrons that are solvated by ammonia molecules.

3. **Color of the Solution**: The deep blue color of the solution is primarily due to the presence of these ammoniated electrons. When these electrons absorb energy, they can get excited to a higher energy level.

4. **Excitation and Emission of Wavelengths**: Upon returning to their ground state, these excited electrons emit energy in the form of light, which corresponds to specific wavelengths in the visible spectrum. The specific wavelengths emitted result in the characteristic deep blue color of the solution.

5. **Conclusion**: Therefore, the deep blue color of the solution when sodium is dissolved in liquid ammonia is due to the presence of ammoniated electrons.

**Final Answer**: The color of the solution is due to **ammoniated electrons**.

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