ChemistryNEET 2024Hydrogen bonding and dipole moment

Chemical Bonding and Molecular Structure

Identify the correct answer.

A. $B F_{3}$ has a non-zero dipole moment
B.The dipole moment of $N F_{3}$ is greater than that of $N H_{3}$
C.Three canonical forms can be drawn for the $C O_{3}^{2 -}$ ion✓
D.Three resonance structures can be drawn for ozone

Solution

$C O_{3}^{2 -}$ has three equivalent resonance structures with the double bond on each oxygen in turn. $B F_{3}$ is trigonal planar with zero dipole; $N H_{3}$ has a larger dipole than $N F_{3}$ ; ozone has two resonance structures.

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Chemical Bonding and Molecular Structure

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