White phosphorus occurs as discrete `P_4` units , where P atom lie at the corners of a regular tetrahedron . The PPP bond angle is

Options

A. `90^(@) `
B. `109^(@)28'`
C. `60^@`
D. `120^(@)`

Answer

To determine the bond angle in white phosphorus (P₄), we need to analyze its molecular structure step by step.

### Step-by-Step Solution:

1. **Understanding the Structure**:
White phosphorus consists of four phosphorus atoms arranged in a tetrahedral shape. Each phosphorus atom is located at the corners of the tetrahedron.

2. **Identifying the Geometry**:
The geometry of a tetrahedron is characterized by its bond angles. In a perfect tetrahedral structure, the bond angles between the atoms are equal.

3. **Calculating the Bond Angle**:
In a tetrahedral geometry, the bond angle is defined as the angle between any two bonds that originate from the same atom. For a tetrahedron, this bond angle is approximately 109.5 degrees.

4. **Conclusion**:
Therefore, the bond angle in white phosphorus (P₄) is 109.5 degrees.

### Final Answer:
The bond angle in white phosphorus (P₄) is 109.5 degrees.

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