Select correct order between given compounds .

Options

A. `COCl_(2)gtCOF_(2)` : `XCX` bond angle
B. `NO_(2)FgtNO_(2)Cl` : `ONO` bond angle
C. `SO_(2)F_(2)ltSOF_(2)` : `FSF` bond angle
D. `N_(2)F_(2)ltN_(2)(CH_(3))_(2)` : `N-N` bond length

Answer

To solve the problem of selecting the correct order between the given compounds based on bond angles and bond lengths, we will analyze each option step by step.

### Step 1: Analyze Option A - COCl2 vs. COF2
- **Hybridization**: Both COCl2 and COF2 have carbon in sp² hybridization.
- **Bond Angles**: The bond angle is influenced by the size of the atoms and their electronegativity. Chlorine (Cl) is larger and less electronegative than fluorine (F).
- **Conclusion**: Since F is more electronegative and smaller than Cl, the bond angle in COCl2 (C-Cl) will be greater than that in COF2 (C-F). Therefore, the order COCl2 > COF2 is correct.

### Step 2: Analyze Option B - NO2F vs. NO2Cl
- **Bond Angles**: In both compounds, we are looking at the bond angle between the oxygen atoms.
- **Electronegativity**: Fluorine (F) is more electronegative than chlorine (Cl), which affects the bond angle.
- **Conclusion**: The presence of F leads to a smaller bond angle between the oxygen atoms in NO2F compared to NO2Cl. Thus, the order NO2F > NO2Cl is correct.

### Step 3: Analyze Option C - SO2F2 vs. SOF2
- **Comparison of Bond Angles**: SO2F2 has an additional oxygen atom compared to SOF2.
- **Bond Angles**: The presence of more electronegative atoms (F) in SO2F2 would typically increase the bond angle, but the extra oxygen atom also plays a role.
- **Conclusion**: In this case, SO2F2 will have a larger FSF bond angle than SOF2. Therefore, the order SO2F2 < SOF2 is incorrect.

### Step 4: Analyze Option D - N2F2 vs. N2CH3
- **Bond Lengths**: We need to compare the N-N bond lengths in both compounds.
- **Electronegativity**: Fluorine (F) is more electronegative than the methyl group (CH3). This affects the bond character.
- **Conclusion**: The presence of F increases the N-N bond character, leading to a shorter bond length in N2F2 compared to N2CH3. Thus, the order N2F2 < N2CH3 is correct.

### Final Conclusion
The correct orders based on the analysis are:
- Option A: COCl2 > COF2
- Option B: NO2F > NO2Cl
- Option D: N2F2 < N2CH3

Therefore, the correct options are A, B, and D.

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