Choose the correct statement regarding `SeOCl_(2)` molecule :

Options

A. It does not contain plane of symmtry
B. Cl-S-Cl` bond angle is greater than 'Cl-Se-O' bond angle
C. Lone pair has greater than 33.% s-character
D. Central atom used one d-ordital in bonding

Answer

To analyze the `SeOCl_(2)` molecule and choose the correct statement regarding it, we can follow these steps:

### Step 1: Determine the Molecular Geometry
- Selenium (Se) is the central atom in `SeOCl_(2)`. It is bonded to one oxygen atom (O) and two chlorine atoms (Cl).
- To determine the molecular geometry, we need to consider the number of bonding pairs and lone pairs around the selenium atom. Selenium has 6 valence electrons, and it forms 3 bonds (1 with O and 2 with Cl).

### Step 2: Calculate Lone Pairs
- Since Se has 6 valence electrons and uses 3 for bonding, it will have 3 lone pairs remaining (6 - 3 = 3).
- The presence of lone pairs will affect the bond angles in the molecule.

### Step 3: Identify the Molecular Shape
- With 3 lone pairs and 3 bonding pairs, the molecular geometry can be predicted using VSEPR theory. The shape will be trigonal bipyramidal, but the presence of lone pairs will alter the angles.
- The lone pairs will occupy the equatorial positions to minimize repulsion, leading to a seesaw shape.

### Step 4: Analyze Bond Angles
- In a seesaw molecular geometry, the bond angles are typically less than 90° and 120° due to the presence of lone pairs.
- The bond angle between the Se-O bond and the Se-Cl bonds will be less than 120° due to lone pair repulsion.

### Step 5: Conclusion
- Based on the analysis, the correct statement regarding the `SeOCl_(2)` molecule is that it has a seesaw shape with bond angles affected by the presence of lone pairs, leading to angles that are less than the ideal angles in a trigonal bipyramidal arrangement.

### Final Statement
The correct statement regarding `SeOCl_(2)` is that it has a seesaw molecular geometry with bond angles that are less than 120° due to the presence of lone pairs.

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