The species which react with silica/glass in presence of moisture:

Options

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

Explanation

To solve the question about which species react with silica/glass in the presence of moisture, we will analyze each option provided:

### Step 1: Identify the Chemical Nature of Silica
Silica, or glass, has the chemical formula SiO2. We need to determine which of the given species can react with SiO2 in the presence of moisture.

**Hint:** Understand the chemical composition of silica to identify potential reactions.

### Step 2: Analyze Each Option
1. **Hydrogen Fluoride (HF)**:
- Reaction: HF + SiO2 + H2O → SiF4 + H2O
- HF reacts with SiO2 to form silicon tetrafluoride (SiF4) and water. This reaction is complete and HF is soluble in SiO2.

2. **Xenon Difluoride (XeF2)**:
- Reaction: 2 XeF2 + SiO2 → Xe + SiF4 + O2 (partial hydrolysis)
- XeF2 can react with SiO2, leading to partial hydrolysis, producing xenon (Xe) and silicon tetrafluoride (SiF4).

3. **Xenon Tetrafluoride (XeF4)**:
- Reaction: XeF4 + SiO2 → Xe + SiF4 + O2
- Similar to XeF2, XeF4 reacts with SiO2 to produce xenon (Xe) and silicon tetrafluoride (SiF4).

4. **Xenon Hexafluoride (XeF6)**:
- Reaction: XeF6 + SiO2 → Xe + SiF4 + O2
- XeF6 also reacts with SiO2, yielding xenon (Xe) and silicon tetrafluoride (SiF4).

**Hint:** Look for the products formed in each reaction to determine if they involve SiO2.

### Step 3: Conclusion
From the analysis:
- All four species (HF, XeF2, XeF4, XeF6) react with silica/glass (SiO2) in the presence of moisture.
- Therefore, the correct answer is that all options are correct.

**Final Answer:** All options (1, 2, 3, and 4) are correct as they all react with silica/glass in the presence of moisture.