The correct order of increasing bond angle is

Options

A. `OF_(2)ltClO_(2)ltH_(2)OltCl_(2)O`
B. `OF_(2)ltH_(2)OltCl_(2)OltClO_(2)`
C. `OF_(2)ltH_(2)OltClO_(2)ltCl_(2)O`
D. `ClO_(2)ltOF_(2)ltH_(2)OltCl_(2)O`

Answer

To determine the correct order of increasing bond angles for the given molecules, we will analyze each molecule step by step, considering the effects of lone pairs and the electronegativity of the atoms involved.

### Step-by-Step Solution:

1. **Identify the Molecules and Their Structures**:
- **OF2 (Oxygen Difluoride)**: Oxygen is at the center with two fluorine atoms attached and two lone pairs on oxygen.
- **H2O (Water)**: Oxygen is at the center with two hydrogen atoms attached and two lone pairs on oxygen.
- **ClO2 (Chlorine Dioxide)**: Chlorine is at the center with two oxygen atoms attached (double bonds) and one lone pair on chlorine.
- **Cl2O (Dichlorine Monoxide)**: Oxygen is at the center with two chlorine atoms attached and two lone pairs on oxygen.

2. **Determine Bond Angles**:
- **OF2**: The bond angle (F-O-F) is approximately **103.2°** due to lone pair-lone pair repulsion.
- **H2O**: The bond angle (H-O-H) is approximately **104.5°**, which is slightly higher than OF2 due to similar lone pair-lone pair repulsion.
- **ClO2**: The bond angle (O-Cl-O) is approximately **118°** due to the presence of a lone pair and the double bonds with oxygen.
- **Cl2O**: The bond angle (Cl-O-Cl) is approximately **110.8°** due to lone pair repulsion and the electronegativity of chlorine.

3. **Compare the Bond Angles**:
- OF2: 103.2°
- H2O: 104.5°
- Cl2O: 110.8°
- ClO2: 118°

4. **Order the Molecules by Increasing Bond Angle**:
- Start with the smallest bond angle: **OF2 (103.2°)**
- Next is **H2O (104.5°)**
- Then **Cl2O (110.8°)**
- Finally, **ClO2 (118°)**

5. **Final Order**:
The correct order of increasing bond angle is:
**OF2 < H2O < Cl2O < ClO2**

### Conclusion:
The correct order of increasing bond angle is **OF2, H2O, Cl2O, CLO2**.

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