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MHT CET202618 April 2026Evening ShiftChemistryChemical Bonding and Molecular StructureActual

Select the incorrect statement from the following.

Options

  1. ANH ₃ and NF ₃ both are polar molecules
  2. BNH ₃ and NF ₃ both have pyramidal shape
  3. CIn NH ₃ and NF ₃ the orbital dipole due to lone pair is in the same direction as that of resultant dipole mome
  4. DDipole moment of NH ₃ is greater than NF ₃

Correct answer

C. In NH ₃ and NF ₃ the orbital dipole due to lone pair is in the same direction as that of resultant dipole mome

Step-by-step solution

Both NH ₃ and NF ₃ have a central nitrogen atom with sp^3 hybridization and one lone pair, giving them a trigonal pyramidal shape. Both are polar molecules. In NH ₃ , nitrogen is more electronegative than hydrogen. The bond dipole moments of the three N-H bonds are directed towards the nitrogen atom. Their resultant dipole moment is in the same direction as the orbital dipole due to the lone pair, leading to a higher net dipole moment. In NF ₃ , fluorine is more electronegative than nitrogen. The bond dipole moment

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