The solution of which of the following will be non - conducting ?

Options

A.
B.
C.
D.

Answer

To determine which of the given complexes will be non-conducting, we need to analyze each complex based on its ability to dissociate into ions in solution. Conductivity in solutions is primarily due to the presence of free ions. If a compound does not dissociate into ions, it will not conduct electricity.

### Step-by-Step Solution:

1. **Understanding Conductivity**:
- Conductivity in solutions is due to the presence of ions. If a compound dissociates into ions when dissolved, it will conduct electricity. If it does not dissociate, it will be non-conducting.

2. **Identifying the Complexes**:
- We have four complexes labeled A, B, C, and D. We need to analyze each one to see if they produce ions upon dissociation.

3. **Analyzing Complex A**:
- Complex A: Co(NH₃)₆Cl₃
- This complex has 6 ammonia (NH₃) ligands and 3 chloride (Cl⁻) ions.
- Upon dissociation, it forms Co(NH₃)₆³⁺ and 3 Cl⁻ ions.
- **Conclusion**: This complex will conduct electricity.

4. **Analyzing Complex B**:
- Complex B: Co(NH₃)₄Cl₂Cl
- This complex has 4 ammonia ligands and 2 chloride ions directly attached, with one Cl outside the coordination sphere.
- Upon dissociation, it forms Co(NH₃)₄Cl₂⁺ and Cl⁻ ions.
- **Conclusion**: This complex will also conduct electricity.

5. **Analyzing Complex C**:
- Complex C: Co(NH₃)₃Cl₃
- All ligands (3 NH₃ and 3 Cl) are directly attached to the cobalt ion.
- There are no ions that can dissociate; it remains as a neutral complex.
- **Conclusion**: This complex will not conduct electricity (non-conducting).

6. **Analyzing Complex D**:
- Complex D: Co(NH₃)₅ClCl₂
- This complex has 5 ammonia ligands and 3 chloride ions (2 directly attached and 1 outside the coordination sphere).
- Upon dissociation, it forms Co(NH₃)₅Cl₂⁺ and Cl⁻ ions.
- **Conclusion**: This complex will conduct electricity.

7. **Final Conclusion**:
- The only complex that does not dissociate into ions is Complex C (Co(NH₃)₃Cl₃). Therefore, the answer to the question is that the solution of Complex C will be non-conducting.

### Answer:
The solution of Complex C (Co(NH₃)₃Cl₃) will be non-conducting.

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