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COMEDK2023Morning ShiftChemistryChemical Bonding and Molecular StructureActual

Pick up the correct statement.

Options

  1. AIn BF ₃ bond dicopoles are zero but dipole moment is higher.
  2. BO ₂, H ₂ shown bond diapole due to polarisation.
  3. CDipole moment of ammonia is due to orbital dipole and resultant dipole in same direction.
  4. DDipole moment is scalar quantity.

Correct answer

C. Dipole moment of ammonia is due to orbital dipole and resultant dipole in same direction.

Step-by-step solution

The dipole moment of a molecule is a vector quantity, as it has both magnitude and direction. Thus, option (riUg0) is incorrect. In BF ₃ , the molecule has a trigonal planar geometry. The individual B-F bonds are polar, but the resultant dipole moment is zero due to the symmetry of the molecule. Thus, option (HcGbv) is incorrect. O ₂ and H ₂ are homonuclear diatomic molecules. The electronegativity difference between the atoms is zero, so there is no bond dipole moment. Thus, option (KcrsK) is incorrect. In ammonia

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