Which of the following molecules has a non-zero dipole moment?
NEET UG 2021 · Chemical Bonding and Molecular Structure · medium
NEET 20214 options · 1 correct
Which of the following molecules has a non-zero dipole moment?
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Answer: A
NH3
Why
CO2 is linear, CCl4 is tetrahedral and BF3 is trigonal planar, so in each case the bond dipoles cancel. NH3 is pyramidal because of the lone pair on nitrogen, so the bond dipoles add to a net dipole moment of about 1.47 D.