Which of the following will dissolve in liq. `HF` without any chemical reaction?

Options

A. `XeF_(2)`
B. `XeF_(4)`
C. `XeF_(6)`
D. `NaH`

Explanation

To solve the question "Which of the following will dissolve in liquid HF without any chemical reaction?" we need to analyze the given compounds: Xenon F2, Xenon F4, Xenon F6, and NaH.

### Step-by-Step Solution:

1. **Identify the Compounds**:
- The compounds in question are Xenon F2 (XeF2), Xenon F4 (XeF4), Xenon F6 (XeF6), and Sodium Hydride (NaH).

2. **Understand the Behavior of Each Compound in Liquid HF**:
- **Xenon F2 (XeF2)**: This compound is known to dissolve in liquid HF without undergoing any chemical reaction.
- **Xenon F4 (XeF4)**: Similar to XeF2, this compound also dissolves in liquid HF without reacting chemically.
- **Xenon F6 (XeF6)**: This compound reacts with HF, leading to a chemical reaction.
- **Sodium Hydride (NaH)**: NaH also reacts with HF, producing hydrogen gas (H2) and sodium fluoride (NaF).

3. **Determine Which Compounds Dissolve Without Reaction**:
- From the analysis, we find that both Xenon F2 and Xenon F4 can dissolve in liquid HF without any chemical reaction.
- Xenon F6 and NaH both react with HF, so they do not meet the criteria.

4. **Conclusion**:
- The compounds that dissolve in liquid HF without any chemical reaction are **Xenon F2 and Xenon F4**.

### Final Answer:
- The correct options are **Xenon F2 and Xenon F4**.