`BeCl_(2)` is not isostructural with

Options

A. `IC l_(2)^(-)`
B. `C_(2)H_(2)`
C. `XeF_(2)`
D. `GeCl_(2)`

Explanation

To determine which molecule is not isostructural with BeCl₂, we need to analyze the structure and hybridization of each given option.

### Step-by-Step Solution:

1. **Understanding BeCl₂ Structure:**
- Beryllium chloride (BeCl₂) has a linear structure.
- Beryllium (Be) has 2 valence electrons and forms 2 bonds with chlorine (Cl) atoms, resulting in 0 lone pairs.
- The hybridization of BeCl₂ is sp, leading to a linear geometry.

2. **Analyzing ICl₂⁻:**
- Iodine (I) has 7 valence electrons. With a negative charge, it has 8 electrons.
- It forms 2 bonds with Cl atoms and has 3 lone pairs.
- The hybridization is sp³d (2 bond pairs + 3 lone pairs), resulting in a linear structure due to the presence of only 2 bond pairs.

3. **Analyzing C₂H₂:**
- In ethyne (C₂H₂), each carbon atom forms a triple bond with the other carbon and single bonds with hydrogen atoms.
- The hybridization of carbon in C₂H₂ is sp, leading to a linear structure.

4. **Analyzing XC-F₂:**
- Assuming XC is a generic element with 8 valence electrons, it forms 2 bonds with fluorine (F) and has 3 lone pairs.
- The hybridization is sp³d (2 bond pairs + 3 lone pairs), resulting in a linear structure.

5. **Analyzing GeCl₂:**
- Germanium (Ge) has 4 valence electrons and forms 2 bonds with Cl atoms, resulting in 1 lone pair.
- The hybridization is sp² (2 bond pairs + 1 lone pair), leading to a bent or V-shaped structure.

### Conclusion:
- BeCl₂ is linear with sp hybridization.
- ICl₂⁻, C₂H₂, and XC-F₂ are also linear.
- GeCl₂ is not linear; it has a bent shape due to sp² hybridization.

Thus, **GeCl₂ is not isostructural with BeCl₂**.