Which of the following sequence represents the correct increasing order of bond angle in the given molecular ?

Options

A. `ClO_(2) lt OF_(2) lt OC l_(2) lt H_(2)O`
B. `OF_(2) lt H_(2)O lt OC l_(2)lt ClO_(2)`
C. `OC l_(2) lt ClO_(2) lt H_(2)O lt OF_(2)`
D. `H_(2)O lt OF_(2) lt OC l_(2) lt ClO_(2)`

Answer

To determine the correct increasing order of bond angles for the given molecular compounds, we need to analyze the molecular structures and the factors affecting bond angles, such as lone pairs and electronegativity.

### Step-by-Step Solution:

1. **Identify the Molecular Structures**:
- **H2O (Water)**: The structure consists of one oxygen atom bonded to two hydrogen atoms with two lone pairs on the oxygen.
- **OF2 (Oxygen Difluoride)**: Similar to water, it has one oxygen atom bonded to two fluorine atoms with two lone pairs on the oxygen.
- **OCl2 (Oxygen Dichloride)**: This has one oxygen atom bonded to two chlorine atoms with two lone pairs on the oxygen.
- **ClO2 (Chlorine Dioxide)**: This has one chlorine atom bonded to two oxygen atoms with one lone pair on the chlorine.

2. **Determine Bond Angles**:
- **H2O**: The bond angle is approximately 104.5° due to the repulsion from the two lone pairs.
- **OF2**: The bond angle is approximately 103°; the presence of highly electronegative fluorine atoms reduces the bond angle slightly.
- **OCl2**: The bond angle is approximately 111°; the larger size of chlorine atoms leads to less repulsion compared to smaller atoms.
- **ClO2**: The bond angle is approximately 118°; the presence of a pi bond and one lone pair allows for a larger bond angle due to bond pair-bond pair repulsion.

3. **Arrange in Increasing Order**:
- From the bond angles determined:
- OF2 (103°) < H2O (104.5°) < OCl2 (111°) < ClO2 (118°)
- Therefore, the increasing order of bond angles is:
- OF2 < H2O < OCl2 < ClO2

4. **Select the Correct Option**:
- Based on the analysis, the correct increasing order of bond angles is represented by the option:
- **OF2 < H2O < OCl2 < ClO2**

### Final Answer:
The correct increasing order of bond angles is: **OF2 < H2O < OCl2 < ClO2**.

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