In which of the following species maximum atom can lie in same plane ?

Options

A. `XeF_(2)O_(2)`
B. `PCl_(5)`
C. `AsH_(4)^(+)`
D. `XeF_(4)`

Explanation

To determine which of the given species has the maximum number of atoms lying in the same plane, we will analyze the molecular geometry of each compound.

### Step-by-Step Solution:

1. **Identify the Compounds**: The compounds given are:
- XCF2O2
- PCl5
- AsH4+
- XCF4

2. **Analyze XCF2O2**:
- The molecular geometry of XCF2O2 is based on the VSEPR theory. It has a bent shape (or V-shape) due to the presence of lone pairs on the central atom.
- In this structure, only **2 atoms** (the two fluorine atoms) lie in the same plane.

3. **Analyze PCl5**:
- PCl5 has a trigonal bipyramidal structure. In this structure, there are three chlorine atoms in the equatorial plane and two chlorine atoms in the axial positions.
- Therefore, **3 atoms** (the three equatorial chlorine atoms) lie in the same plane.

4. **Analyze AsH4+**:
- AsH4+ has a tetrahedral structure. However, due to the positive charge, it can be considered to have a slightly distorted tetrahedral shape.
- In this case, **3 atoms** (any three hydrogen atoms) can be considered to lie in the same plane at a time.

5. **Analyze XCF4**:
- XCF4 has a square planar geometry. In this structure, all four fluorine atoms are positioned in the same plane.
- Thus, **4 atoms** (the four fluorine atoms) lie in the same plane.

6. **Conclusion**:
- Comparing the number of atoms lying in the same plane:
- XCF2O2: 2 atoms
- PCl5: 3 atoms
- AsH4+: 3 atoms
- XCF4: 4 atoms
- Therefore, the species with the maximum number of atoms lying in the same plane is **XCF4**.

### Final Answer:
The correct choice is **XCF4**.