The wrong statement regarding sulphur oxides is

Options

A. `SO_(3)` is formed in 2nd excited state of 'S'
B. Molecule of `SO_(3)` contains both `P_(pi)-P_(pi)`  bonds and `P_(pi)-d_(pi)`  bonds
C. `SO_(2)` and `SO_(3)` can be differentiated by acidified `K_(2)Cr_(2)O_(7)`
D. `gamma-SO_(2)` is more stable than `alpha-SO_(3)`and During the bleaching action of `SO_(2)` it is converted to Sulfuric acid

Answer

To determine the wrong statement regarding sulfur oxides, we will analyze each statement provided in the question systematically.

### Step-by-Step Solution:

1. **Identify the Statements**:
We need to evaluate the following statements about sulfur oxides (SO2 and SO3):
- Statement 1: SO3 is formed in the second excited state of sulfur.
- Statement 2: The molecules of SO3 contain both p pi p pi and p pi d pi bonds.
- Statement 3: SO2 and SO3 can be differentiated by acidified K2Cr2O7.
- Statement 4: Gamma SO2 is more stable than alpha SO3.
- Statement 5: During the bleaching action, SO2 will form sulfuric acid.

2. **Evaluate Statement 1**:
- SO3 (sulfur trioxide) is actually formed from sulfur in its first excited state, not the second. The second excited state of sulfur leads to the formation of SF6 (sulfur hexafluoride).
- **Conclusion**: This statement is **wrong**.

3. **Evaluate Statement 2**:
- SO3 has a structure that includes both p pi p pi bonds (between sulfur and oxygen) and p pi d pi bonds (due to the involvement of d orbitals of sulfur).
- **Conclusion**: This statement is **true**.

4. **Evaluate Statement 3**:
- Acidified K2Cr2O7 can differentiate between SO2 and SO3 because it reacts with SO2 but not with SO3. This is a characteristic reaction that confirms the presence of SO2.
- **Conclusion**: This statement is **true**.

5. **Evaluate Statement 4**:
- The stability of SO2 and SO3 can be compared. Gamma SO2 (a specific allotrope) is indeed more stable than alpha SO3.
- **Conclusion**: This statement is **true**.

6. **Evaluate Statement 5**:
- SO2 can act as a bleaching agent and, when it reacts with water, it can form sulfuric acid (H2SO4).
- **Conclusion**: This statement is **true**.

### Final Conclusion:
The only wrong statement regarding sulfur oxides is **Statement 1**: "SO3 is formed in the second excited state of sulfur."