Multiple Choice
Which type of intermolecular force is generally considered the weakest attraction between molecules?
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13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
Multiple Choice
Which types of intermolecular forces can methanol (CH3OH) form with water molecules?
A
Hydrogen bonding and dipole-dipole interactions
B
Only London dispersion forces
C
Only dipole-induced dipole interactions
D
Only ion-dipole interactions
Verified step by step guidance1
Identify the molecular structure of methanol (CH\_3OH) and water (H\_2O). Both molecules contain polar bonds and have regions of partial positive and negative charges.
Recognize that methanol has an -OH group, which can act as a hydrogen bond donor and acceptor due to the highly electronegative oxygen atom bonded to hydrogen.
Understand that water molecules also have -OH groups capable of hydrogen bonding, so methanol and water can form hydrogen bonds with each other.
Note that both methanol and water are polar molecules, so they can also interact through dipole-dipole interactions, which occur between molecules with permanent dipoles.
Conclude that the main intermolecular forces between methanol and water are hydrogen bonding and dipole-dipole interactions, while London dispersion forces are present but weaker, and ion-dipole interactions do not apply since neither molecule is ionic.
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