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CBSE Class 11-science Answered

#jiochat what is dipole moment?
Asked by narayandhar1979 | 28 Oct, 2018, 10:25: AM
Expert Answer
  • Dipole moment (μ) is defined as the product of the distance of separation between the charges and the magnitude of charge.
  • It is the measure of net molecular polarity.
  • It is the magnitude of the charge Q at either end of the molecular dipole times the distance r between the charges.

                         μ=Q×r

  • It tells us about the charge separation in a molecule.
  • The larger the difference in electronegativities of bonded atoms, the larger the dipole moment.
  • For example, the CO2 molecule does not have a dipole moment because it is symmetrical, hence there is no charge separation, while NaCl has the highest dipole moment because it has an ionic bond (i.e. highest charge separation).
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