Dipole moment of NF3 is smaller than: 

  1. A

    NH3

  2. B

    CO2

  3. C

    BF3

  4. D

    CCl4

    Join Our Infinity Learn's Learning Program!

    FREE Lve Classes, PDFs, Solved Questions, PYQ's, Mock Tests, Practice Tests, and Test Series!

    +91

    Verify OTP Code (required)


    I agree to the terms and conditions and privacy policy.

    Solution:

    • Both the molecules have a pyramidal shape with a lone pair of electrons on the nitrogen atom.
    • Although fluorine is more electronegative than nitrogen, the resultant dipole moment of NH3​ (4.90×10−30 CM) is greater than that of NF3​ (0.8×10−30 Cm).
    • This is because in case of NH3​ the orbital dipole due to lone pair is in the same direction as the resultant dipole moment of the N - H bonds.
    • Whereas in NF3​ the orbital dipole is in the direction opposite to the resultant dipole moment of the three N - F bonds. The orbital dipole because of the lone pair decreases the effect of the resultant N - F bond moments, which results in the low dipole moment of NF3​.
    solution

      Join Infinity Learn Regular Class Program!

      Sign up & Get instant access to FREE PDF's, solved questions, Previous Year Papers, Quizzes and Puzzles!

      +91

      Verify OTP Code (required)





      I agree to the terms and conditions and privacy policy.