Which of the following statement is not correct about `P_4O_6` and `P_4O_(10)` ?

Options

A. Both oxides have closed cage like structure
B. Each oxide contain six P - O -P bonds
C. Both ` P _ 4 O _ 6 and P _ 4 O _ (10 ) ` molecules have ` d pi - p pi ` bonds
D. Both are the anhydrides of their respective acids.

Answer

To determine which statement is not correct about \( P_4O_6 \) and \( P_4O_{10} \), we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Structures of \( P_4O_6 \) and \( P_4O_{10} \)**:
- \( P_4O_6 \) has a cage-like structure with phosphorus and oxygen atoms arranged in a specific configuration.
- \( P_4O_{10} \) also has a cage-like structure, but it contains more oxygen atoms compared to \( P_4O_6 \).

2. **Analyzing the Statements**:
- **Statement 1**: "Both oxides have closed cage-like structure."
- This statement is correct as both \( P_4O_6 \) and \( P_4O_{10} \) exhibit cage-like structures.

- **Statement 2**: "Each oxide contains 6 P-O-P bonds."
- This statement is also correct. Both \( P_4O_6 \) and \( P_4O_{10} \) have 6 P-O-P bonds in their structures.

- **Statement 3**: "Both \( P_4O_6 \) and \( P_4O_{10} \) molecules have D pi to P pi bonds."
- This statement is incorrect. \( P_4O_6 \) does not have D pi to P pi bonds. The bonding in \( P_4O_6 \) does not involve d-orbitals participating in π-bonding.

- **Statement 4**: "Both are the anhydrous of their respective acids."
- This statement is correct. \( P_4O_6 \) is the anhydride of phosphorous acid (\( H_3PO_3 \)), and \( P_4O_{10} \) is the anhydride of phosphoric acid (\( H_3PO_4 \)).

3. **Conclusion**:
- The statement that is not correct is **Statement 3**: "Both \( P_4O_6 \) and \( P_4O_{10} \) molecules have D pi to P pi bonds."

### Final Answer:
The statement that is not correct about \( P_4O_6 \) and \( P_4O_{10} \) is: "Both \( P_4O_6 \) and \( P_4O_{10} \) molecules have D pi to P pi bonds."