Which among the following is (are) having two lone pair of electrons on central atom ? .

Options

A. `F_(2)O`
B. `ClF_(3)`
C. `XeF_(4)`
D. `SF_(4)`

Explanation

To determine which among the given compounds has a central atom with two lone pairs of electrons, we will analyze each compound one by one.

### Step-by-Step Solution:

1. **Identify the Central Atom:**
- For each compound, identify the central atom based on electronegativity. The less electronegative atom is usually the central atom.

2. **Analyze F2O (Fluorine Dioxide):**
- Central atom: Oxygen (O)
- Oxygen forms two bonds with two fluorine atoms.
- The maximum covalency of oxygen is 6. Since it forms 2 bonds (2 electrons), it will have 4 electrons remaining.
- These 4 electrons will form 2 lone pairs.
- **Conclusion:** F2O has 2 lone pairs on the central atom (O).

3. **Analyze ClF3 (Chlorine Trifluoride):**
- Central atom: Chlorine (Cl)
- Chlorine forms three bonds with three fluorine atoms.
- The maximum covalency of chlorine is 7. Since it forms 3 bonds (3 electrons), it will have 4 electrons remaining.
- These 4 electrons will form 2 lone pairs.
- **Conclusion:** ClF3 has 2 lone pairs on the central atom (Cl).

4. **Analyze XeF4 (Xenon Tetrafluoride):**
- Central atom: Xenon (Xe)
- Xenon forms four bonds with four fluorine atoms.
- The maximum covalency of xenon is 8. Since it forms 4 bonds (4 electrons), it will have 4 electrons remaining.
- These 4 electrons will form 2 lone pairs.
- **Conclusion:** XeF4 has 2 lone pairs on the central atom (Xe).

5. **Analyze SF4 (Sulfur Tetrafluoride):**
- Central atom: Sulfur (S)
- Sulfur forms four bonds with four fluorine atoms.
- The maximum covalency of sulfur is 6. Since it forms 4 bonds (4 electrons), it will have 2 electrons remaining.
- These 2 electrons will form 1 lone pair.
- **Conclusion:** SF4 has only 1 lone pair on the central atom (S).

### Final Answer:
The compounds that have two lone pairs of electrons on the central atom are:
- F2O
- ClF3
- XeF4