Which of the following can be employed for the conversion of potassium manganate to potassium permanganate?
C l 2 ; O 3 ; S O 2 ; K N O 3

Options

A. `Cl_(2)`
B. `O_(3)`
C. `SO_(2)`
D. `KNO_(3)`

Answer

To convert potassium manganate (K2MnO4) to potassium permanganate (KMnO4), we need to identify suitable oxidizing agents. The oxidation state of manganese in potassium manganate is +6, while in potassium permanganate it is +7. This indicates that manganese is being oxidized in the conversion process.

### Step-by-Step Solution:

1. **Identify the Compounds**:
- Potassium manganate: K2MnO4
- Potassium permanganate: KMnO4

2. **Determine the Oxidation States**:
- In K2MnO4, manganese (Mn) has an oxidation state of +6.
- In KMnO4, manganese (Mn) has an oxidation state of +7.

3. **Understand the Reaction**:
- The conversion involves the oxidation of Mn from +6 to +7, which means we need an oxidizing agent that can facilitate this process by removing an electron from Mn.

4. **Evaluate the Given Reagents**:
- **Cl2 (Chlorine)**: This is an oxidizing agent. It can accept electrons and therefore can facilitate the oxidation of Mn from +6 to +7.
- **O3 (Ozone)**: Ozone is also a strong oxidizing agent. It can accept electrons and can similarly facilitate the oxidation of Mn.
- **SO2 (Sulfur Dioxide)**: This is a reducing agent, which means it donates electrons rather than accepting them. Therefore, it cannot facilitate the oxidation of Mn.
- **KNO3 (Potassium Nitrate)**: While KNO3 is a strong oxidizing agent, it does not directly participate in this particular reaction to convert K2MnO4 to KMnO4.

5. **Conclusion**:
- The reagents that can be employed for the conversion of potassium manganate to potassium permanganate are **Cl2** and **O3**.

### Final Answer:
The suitable reagents for the conversion of potassium manganate (K2MnO4) to potassium permanganate (KMnO4) are **Cl2 and O3**.

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