Correct statement regarding molecules `SF_(4),CF_(4) and XeF_(4)` are :

Options

A. 2,0 and 1 lone pairs of central atom respectively
B. 1,0 and 1 lone pairs of central atom respectively
C. 0,0 and 2 lone pairs of central atom respectively
D. 1,0 and 2 lone pairs of central atom respectively

Answer

To analyze the molecules SF₄, CF₄, and XeF₄ regarding their lone pairs on the central atom, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the central atom and its valence electrons**:
- **SF₄ (Sulfur Tetrafluoride)**:
- Sulfur (S) is the central atom. It is in group 16 and has 6 valence electrons.
- **CF₄ (Carbon Tetrafluoride)**:
- Carbon (C) is the central atom. It is in group 14 and has 4 valence electrons.
- **XeF₄ (Xenon Tetrafluoride)**:
- Xenon (Xe) is the central atom. It is a noble gas in group 18 and has 8 valence electrons.

2. **Determine the number of bond pairs formed**:
- In each molecule, the central atom forms bonds with four fluorine atoms.
- Each bond with a fluorine atom uses one valence electron from the central atom.

3. **Calculate the number of lone pairs**:
- **For SF₄**:
- Sulfur has 6 valence electrons.
- It forms 4 bond pairs with fluorine (4 electrons used).
- Remaining electrons = 6 - 4 = 2 electrons.
- These 2 electrons form 1 lone pair (since 2 electrons make 1 lone pair).
- **For CF₄**:
- Carbon has 4 valence electrons.
- It forms 4 bond pairs with fluorine (4 electrons used).
- Remaining electrons = 4 - 4 = 0 electrons.
- Therefore, there are 0 lone pairs.
- **For XeF₄**:
- Xenon has 8 valence electrons.
- It forms 4 bond pairs with fluorine (4 electrons used).
- Remaining electrons = 8 - 4 = 4 electrons.
- These 4 electrons form 2 lone pairs (since 4 electrons make 2 lone pairs).

4. **Summarize the findings**:
- **SF₄**: 1 lone pair
- **CF₄**: 0 lone pairs
- **XeF₄**: 2 lone pairs

5. **Conclusion**:
- The correct statement regarding the lone pairs in these molecules is:
- SF₄ has 1 lone pair, CF₄ has 0 lone pairs, and XeF₄ has 2 lone pairs.

### Final Answer:
- SF₄ has 1 lone pair, CF₄ has 0 lone pairs, and XeF₄ has 2 lone pairs.