The number of `(p pi- p pi)` bonds in `XeO_(4)` is :

Answer

To determine the number of (pπ - pπ) bonds in XeO₄ (xenon tetraoxide), we can follow these steps:

### Step 1: Identify the Structure of XeO₄
XeO₄ has a tetrahedral molecular geometry. In this compound, xenon (Xe) is the central atom surrounded by four oxygen (O) atoms.

**Hint:** Remember that the geometry of a molecule can give insights into the types of bonds formed.

### Step 2: Determine the Hybridization of Xenon
Xenon in XeO₄ undergoes sp³ hybridization. This is because it forms four equivalent bonds with the oxygen atoms, which are sigma (σ) bonds.

**Hint:** Hybridization can be determined by the number of bond pairs and lone pairs around the central atom.

### Step 3: Analyze the Bonding
In XeO₄, each oxygen atom is double bonded to xenon. The double bond consists of one sigma bond and one pi bond. However, in this case, the pi bonds are formed using d-orbitals from xenon, not p-orbitals.

**Hint:** Double bonds consist of one sigma and one pi bond, but the source of the pi bond can vary.

### Step 4: Identify the Type of Bonds
Since xenon uses its d-orbitals for pi bonding with the oxygen atoms, the bonds formed are dπ - pπ bonds, not pπ - pπ bonds. Therefore, there are no pπ - pπ bonds present in XeO₄.

**Hint:** Pay attention to which orbitals are involved in the bonding; this will help in identifying the type of bonds.

### Step 5: Conclusion
Thus, the total number of (pπ - pπ) bonds in XeO₄ is 0.

**Final Answer:** The number of (pπ - pπ) bonds in XeO₄ is 0.

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