Which of the following overlapping is not present in `XeO_(3)` molecule ?

Options

A. `sp^(3)+p_(x)`
B. `sp^(3)+p_(y)`
C. `d_(xz)+p_(x)`
D. `sp^(3)+s`

Answer

To determine which type of overlapping is not present in the `XeO3` molecule, we will analyze the molecular structure and hybridization of xenon in this compound.

### Step-by-Step Solution:

1. **Identify the Molecular Structure of `XeO3`:**
- `XeO3` consists of one xenon (Xe) atom and three oxygen (O) atoms.
- The xenon atom has a steric number of 4, which includes 3 sigma bonds with the oxygen atoms and 1 lone pair.

2. **Determine the Hybridization of Xenon:**
- The steric number of 4 indicates that the hybridization of xenon in `XeO3` is `sp³`.

3. **Draw the Orbital Diagrams:**
- Before excitation, xenon has a filled 5s and 5p orbital configuration.
- After excitation, one of the 5s electrons is promoted to the 5d orbital, allowing the formation of bonds with oxygen.

4. **Analyze the Bonding:**
- The three unpaired electrons from the hybridized orbitals (sp³) will form sigma bonds with the oxygen atoms.
- The oxygen atoms will also contribute their p orbitals for bonding.

5. **Identify Possible Overlaps:**
- The possible overlaps in `XeO3` include:
- `sp³` hybridized orbitals from xenon overlapping with `p` orbitals from oxygen to form sigma bonds.
- `p` orbitals from oxygen can also overlap with `d` orbitals from xenon to form pi bonds.

6. **Evaluate the Given Options:**
- The options provided include various types of overlaps:
- `sp³ + p_x`
- `sp³ + p_y`
- `p_pi + d_pi`
- `sp³ + s`
- The `p_pi + d_pi` overlap is possible as it can occur between the p orbitals of oxygen and the d orbitals of xenon.

7. **Determine the Incorrect Overlap:**
- The overlap `sp³ + s` is not present in `XeO3`. The `s` orbital of xenon contains a lone pair and does not participate in bonding.

### Final Answer:
The type of overlapping that is not present in `XeO3` is **`sp³ + s`**.