To purify fluorine gas, fumes of HF are removed by

Options

A. Solid NaF
B. `H_(2)` gas
C. Solid `KHF_(2)`
D. None of these

Explanation

To purify fluorine gas by removing the fumes of HF (hydrofluoric acid), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Problem**: We need to purify fluorine gas by eliminating the fumes of HF that may be present. HF is a byproduct that can contaminate the fluorine gas.

2. **Choosing the Right Chemical**: To remove HF fumes, we can use a solid compound that can react with HF. In this case, sodium fluoride (NaF) is a suitable choice.

3. **Reaction Process**: When HF fumes are passed over solid NaF, a reaction occurs. The HF reacts with NaF to form sodium bifluoride (NaHF2). This reaction helps in removing HF from the mixture.

\[ \text{HF (g)} + \text{NaF (s)} \rightarrow \text{NaHF}_2 (s) \]

4. **Conclusion**: By passing the HF fumes over solid NaF, we effectively purify the fluorine gas by converting the harmful HF into a solid compound (NaHF2), which can be removed from the system.

### Final Answer:
To purify fluorine gas, the fumes of HF are removed by passing them over solid sodium fluoride (NaF).

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