Among the following ,which one is the wrong statement

Options

A. `PH_(5)` and `BiCl_(5)` do not exist
B. `ppi-dpi` bonds are present in `SO_(2)`
C. `SeF_(4)` and `CH_(4)` have same shape
D. `I_(3)^(+)` has bent geometry

Explanation

To determine which statement among the given options is wrong, we will analyze each statement one by one.

### Step 1: Analyze Statement A
**Statement A:** "pH5 and BiCl5 does not exist."

- **Analysis:**
- pH5 (phosphorus pentahydride) does not exist because phosphorus cannot form stable bonds with hydrogen in this configuration due to the electronegativity difference. Hydrogen is more electronegative than phosphorus, which makes it difficult for phosphorus to hold onto the hydrogen atoms.
- BiCl5 (bismuth pentachloride) also does not exist due to the inert pair effect. As we go down the group in the periodic table, the s-electrons in the outer shell become less available for bonding, leading to the predominance of the +3 oxidation state over the +5. Hence, this statement is true.

### Step 2: Analyze Statement B
**Statement B:** "p-pi d-pi bonds are present in SO2, SeF4 and CH4 having same shape."

- **Analysis:**
- SO2 (sulfur dioxide) has p-pi bonds due to the presence of lone pairs and double bonds with oxygen.
- SeF4 (selenium tetrafluoride) has d-pi bonds due to the involvement of d-orbitals in bonding.
- CH4 (methane) has only sigma bonds and does not involve p-pi or d-pi bonding.
- The statement claims that they have the same shape, which is incorrect. SO2 has a bent shape, SeF4 has a seesaw shape, and CH4 has a tetrahedral shape. Thus, this statement is false.

### Step 3: Analyze Statement C
**Statement C:** "I3+ has bent geometry."

- **Analysis:**
- I3+ (triiodide ion) does indeed have a bent geometry due to the presence of lone pairs on the central iodine atom. This is similar to the geometry of water (H2O), which is also bent. This statement is true.

### Step 4: Analyze Statement D
**Statement D:** "p-pi d-pi bonds are present in SO2, SeF4 and CH4 having same shape."

- **Analysis:**
- As discussed previously, this statement is incorrect because SO2, SeF4, and CH4 do not have the same shape. Therefore, this is the wrong statement.

### Conclusion
The wrong statement among the options is **Statement B**: "p-pi d-pi bonds are present in SO2, SeF4 and CH4 having same shape."