Which of the following shows maximum molar conductance ?

Options

A. `[Co(NH_(3))_(6)]Cl_(3)`
B. `[Co(NH_(3))_(3)Cl_(3)]`
C. `[Co(NH_(3))_(4)Cl_(2)]Cl`
D. `[Co(NH_(3))_(5)Cl]Cl_(2)`

Answer

To determine which of the given coordination compounds shows maximum molar conductance, we need to analyze the dissociation of each compound into its constituent ions. Molar conductance is directly proportional to the number of ions produced when the compound dissociates in solution.

### Step-by-Step Solution:

1. **Identify the Compounds**: We have four coordination compounds to analyze:
- Option 1: [Co(NH3)6]Cl3
- Option 2: [Co(NH3)3]Cl3
- Option 3: [Co(NH3)4Cl2]Cl2
- Option 4: [Co(NH3)5Cl]Cl2

2. **Dissociation of Each Compound**:
- **Option 1**: [Co(NH3)6]Cl3
- This compound dissociates into 1 [Co(NH3)6]³⁺ ion and 3 Cl⁻ ions.
- Total ions = 1 + 3 = 4 ions.

- **Option 2**: [Co(NH3)3]Cl3
- This compound does not dissociate into any ions (it remains as a neutral complex).
- Total ions = 0 ions.

- **Option 3**: [Co(NH3)4Cl2]Cl2
- This compound dissociates into 1 [Co(NH3)4Cl2]²⁺ ion and 2 Cl⁻ ions.
- Total ions = 1 + 2 = 3 ions.

- **Option 4**: [Co(NH3)5Cl]Cl2
- This compound dissociates into 1 [Co(NH3)5Cl]²⁺ ion and 2 Cl⁻ ions.
- Total ions = 1 + 2 = 3 ions.

3. **Compare the Total Number of Ions**:
- Option 1: 4 ions
- Option 2: 0 ions
- Option 3: 3 ions
- Option 4: 3 ions

4. **Conclusion**:
- The compound with the maximum number of ions is Option 1: [Co(NH3)6]Cl3, which produces a total of 4 ions. Therefore, it shows the maximum molar conductance.

### Final Answer:
**Option 1: [Co(NH3)6]Cl3 shows maximum molar conductance.**