On mixing aqueous solution of copper sulphate with aqueous solution of ammonia a deep blue coloured solution is obtained. Choose the correct options :

Options

A. The blue coloured solution shows presence of `Cu^(2+)` ions
B. The blue coloured solution does not show presence of `Cu^(2+)` ions
C. The blue coloured solution shows the presence of `[Cu(NH_(3))_(4)]^(2+)` ions
D. The blue coloured solution does not show the presence of `[Cu(NH_(3))_(4)]^(2+)` ions

Answer

To solve the question regarding the reaction between aqueous solutions of copper sulfate and ammonia, let's break down the process step by step.

### Step-by-Step Solution:

1. **Understanding the Reactants**:
- Copper sulfate (CuSO₄) is a blue crystalline solid that dissolves in water to give Cu²⁺ ions and SO₄²⁻ ions.
- Ammonia (NH₃) is a weak base that, when dissolved in water, can form ammonium hydroxide (NH₄OH).

2. **Mixing the Solutions**:
- When we mix aqueous solutions of CuSO₄ and NH₃, the ammonia can react with the copper ions (Cu²⁺) present in the solution.

3. **Formation of Complex Ion**:
- Ammonia acts as a ligand and coordinates with the Cu²⁺ ions to form a complex ion. The specific complex formed is called tetraamminecopper(II) ion, which is represented as [Cu(NH₃)₄]²⁺.
- The reaction can be summarized as:
\[ \text{Cu}^{2+} + 4 \text{NH}_3 \rightarrow [\text{Cu(NH}_3)_4]^{2+} \]

4. **Color of the Solution**:
- The formation of the tetraamminecopper(II) complex results in a deep blue colored solution. This deep blue color is characteristic of the [Cu(NH₃)₄]²⁺ complex.

5. **Analyzing the Options**:
- **Option 1**: "The blue color solution shows presence of copper 2 plus ions." - This is incorrect because the Cu²⁺ ions are no longer free in the solution; they are part of the complex.
- **Option 2**: "The blue color solution does not show presence of copper 2 plus ions." - This is correct; the Cu²⁺ ions are coordinated in the complex.
- **Option 3**: "The blue color solution shows the presence of Cu(NH₃)₄²⁺ ions." - This is also correct; the complex ion is responsible for the blue color.
- **Option 4**: "The blue color deep blue color solution does not show..." - This is incomplete but likely incorrect based on the context.

6. **Conclusion**:
- The correct options are **Option 2** and **Option 3**. The deep blue color indicates the presence of the tetraamminecopper(II) complex, not free Cu²⁺ ions.