The two compounds pentaamminesulphatocobalt `(III) bromide` and pentaamminesulphatocobalt `(III)` chloride represent `:`

Options

A. Linkage isomerism
B. Ionization isomerism
C. Coordination isomerism
D. No isomerism

Explanation

To determine the type of isomerism exhibited by the two compounds, pentaamminesulphatocobalt(III) bromide and pentaamminesulphatocobalt(III) chloride, we can follow these steps:

### Step 1: Write the Formulas of the Compounds
The first step is to write down the chemical formulas for the two compounds.

1. **Pentaamminesulphatocobalt(III) bromide**: This can be represented as [Co(NH3)5(SO4)]Br.
2. **Pentaamminesulphatocobalt(III) chloride**: This can be represented as [Co(NH3)5(SO4)]Cl.

### Step 2: Analyze the Formulas
Next, we need to analyze the formulas to check if they have the same molecular formula.

- Both compounds have the same coordination complex [Co(NH3)5(SO4)], but differ in the counter ions (Br and Cl).

### Step 3: Determine the Type of Isomerism
Now we can determine the type of isomerism based on the differences in the compounds.

1. **Linkage Isomerism**: This occurs when a ligand can attach to the metal in more than one way. In this case, the sulfate ion (SO4) does not exhibit linkage isomerism because it has a single way of coordinating to cobalt.

2. **Ionization Isomerism**: This occurs when the counter ions can be exchanged. Since we have bromide and chloride as counter ions, these compounds can exhibit ionization isomerism.

3. **Coordination Isomerism**: This occurs when the composition of the coordination sphere differs. Here, both compounds have the same coordination sphere.

4. **No Isomerism**: This would imply that the two compounds are identical, which they are not.

### Conclusion
Based on the analysis, the two compounds pentaamminesulphatocobalt(III) bromide and pentaamminesulphatocobalt(III) chloride exhibit **ionization isomerism** due to the different counter ions.

### Final Answer
The two compounds pentaamminesulphatocobalt(III) bromide and pentaamminesulphatocobalt(III) chloride represent **ionization isomerism**.

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