Multiple Choice
Which intermolecular force is primarily responsible for water's high boiling point?
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13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
Multiple Choice
Which of the following molecules cannot form hydrogen bonds with an identical molecule?
A
CH_4
B
HF
C
NH_3
D
H_2O
Verified step by step guidance1
Understand what hydrogen bonding is: it is a special type of dipole-dipole interaction that occurs when a hydrogen atom is covalently bonded to a highly electronegative atom (usually nitrogen, oxygen, or fluorine) and is attracted to a lone pair of electrons on a nearby electronegative atom in another molecule.
Identify the molecules given: CH_4 (methane), HF (hydrogen fluoride), NH_3 (ammonia), and H_2O (water).
Check each molecule for the presence of hydrogen atoms bonded to N, O, or F atoms, which are necessary for hydrogen bonding:
- CH_4 has hydrogen atoms bonded to carbon, which is not electronegative enough to create hydrogen bonding.
- HF, NH_3, and H_2O all have hydrogen atoms bonded to highly electronegative atoms (F, N, and O respectively), so they can form hydrogen bonds with identical molecules.
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