Multiple Choice
Which type of intermolecular force is primarily responsible for the attraction between individual alcohol molecules?
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13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
Multiple Choice
Which condition must be met for dipole-dipole forces to exist between two molecules?
A
Both molecules must be polar.
B
Both molecules must be nonpolar.
C
Both molecules must be ionic.
D
At least one molecule must contain hydrogen bonded to nitrogen, oxygen, or fluorine.
Verified step by step guidance1
Understand that dipole-dipole forces occur due to the attraction between the positive end of one polar molecule and the negative end of another polar molecule.
Recall that polarity in a molecule arises when there is an uneven distribution of electron density, resulting in a permanent dipole moment.
Recognize that for dipole-dipole interactions to exist, both molecules involved must have permanent dipoles, meaning both must be polar.
Note that nonpolar molecules do not have permanent dipoles, so dipole-dipole forces cannot exist between two nonpolar molecules.
Distinguish dipole-dipole forces from hydrogen bonding (which requires hydrogen bonded to N, O, or F) and ionic interactions (which involve ions, not neutral molecules).
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