JEE MainChemistryChemical Bonding and Molecular Structure
Consider the following statements regarding some common molecules: (A) The bond angle in OF ₂ is less than the bond angle in H ₂ O . (B) The dipole moment of NF ₃ is greater than the dipole moment of NH ₃ . (C) The oxidation state of oxygen in OF ₂ is +2 . (D) The dipole moment of H ₂ O is greater than the dipole moment of OF ₂ . Which of the given statements are correct?
Options
- AA, C, D only
- BA, B, C only
- CB, C, D only
- DA, B, D only
Correct answer
A. A, C, D only
Step-by-step solution
Statement (A): In OF ₂ , fluorine is more electronegative than oxygen, so the bonding electron pairs are pulled away from the central oxygen atom. This decreases the bond pair-bond pair repulsion compared to H ₂ O , allowing the lone pairs to compress the F - O - F angle to approximately 103^ , which is less than the H - O - H angle ( 104.5^ ). Statement (A) is correct. Statement (B): In NH ₃ , the orbital dipole due to the lone pair is in the same direction as the resultant dipole moment of the three N - H bonds.