Which statement is correct about bond angle of `NCI_(3),NF_(3)` and `NH_(3)`
Bond angle of `NCI_(3) gt NF_(3)`
Bond angle of `NCI_(3) gt NF_(3)`
Bond angle of `NH_(3) gt NF_(3)`
Bond angle of `NH_(3) gt NF_(3)` .

Options

A. I,II
B. I,III
C. I,II,III
D. I,II,IV

Explanation

To determine the correct statement regarding the bond angles of NCl₃, NF₃, and NH₃, we need to analyze the molecular geometry and the factors affecting bond angles in these compounds.

### Step 1: Understand the molecular geometry
- **NH₃ (Ammonia)**: The nitrogen atom is bonded to three hydrogen atoms and has one lone pair of electrons. The molecular geometry is trigonal pyramidal, and the bond angle is approximately 107°.
- **NF₃ (Nitrogen Trifluoride)**: The nitrogen atom is bonded to three fluorine atoms and has one lone pair of electrons. The molecular geometry is also trigonal pyramidal, but the bond angle is slightly less than that of NH₃ due to the higher electronegativity of fluorine, which pulls the bonding pairs closer to itself, reducing the bond angle to about 102°.
- **NCl₃ (Nitrogen Trichloride)**: The nitrogen atom is bonded to three chlorine atoms and has one lone pair of electrons. The bond angle is expected to be larger than that of NF₃ because chlorine is less electronegative than fluorine, resulting in less repulsion between the bonding pairs. The bond angle is approximately 107°.

### Step 2: Compare the bond angles
- **NCl₃ vs NF₃**: Since chlorine is less electronegative than fluorine, the bond angle of NCl₃ is greater than that of NF₃.
- **NH₃ vs NF₃**: The bond angle of NH₃ is greater than that of NF₃ due to the same reasons mentioned above.
- **NCl₃ vs NH₃**: The bond angles of NCl₃ and NH₃ are quite similar, but NCl₃ may have a slightly larger bond angle due to the influence of chlorine's lower electronegativity.

### Conclusion
From the analysis, we can conclude:
- The bond angle of NCl₃ > NF₃ (True)
- The bond angle of NH₃ > NF₃ (True)
- Therefore, the correct statement is: **Bond angle of NCl₃ > NF₃ and Bond angle of NH₃ > NF₃**.

### Correct Answer
The correct statement is: **Bond angle of NCl₃ > NF₃** and **Bond angle of NH₃ > NF₃**.

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