Discussion
Which of the following statement is INCORRECT?
Answer: D
The incorrect statement is The dipole moment of NF3 is much greater than that in NH3.
It is the other way round: NH3 is about 1.47 D and NF3 only about 0.23 D. In NH3 the N-H bond dipoles point toward nitrogen, the same way as the lone-pair moment, so they add. In NF3 the N-F bond dipoles point away from nitrogen, against the lone-pair moment, so they largely cancel.
The other statements are true: BF3 is trigonal planar and non-polar; CO and NO+ are isoelectronic (14 electrons) with bond order 3; resonance makes the two O-O bonds in ozone equal; and the carbonate ion has three equivalent canonical forms.
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