Multiple Choice
Which of the following is the weakest type of intermolecular force between molecules?
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13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
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For which of the following substances is hydrogen bonding not a significant intermolecular force?
A
H2O
B
HF
C
CH4
D
NH3
Verified step by step guidance1
Identify what hydrogen bonding is: it is a strong type of dipole-dipole interaction that occurs when hydrogen is covalently bonded to highly electronegative atoms like nitrogen (N), oxygen (O), or fluorine (F).
Examine each substance to see if it contains hydrogen atoms bonded directly to N, O, or F, which is necessary for hydrogen bonding to occur.
For H2O, hydrogen is bonded to oxygen, so hydrogen bonding is significant.
For HF, hydrogen is bonded to fluorine, so hydrogen bonding is significant.
For NH3, hydrogen is bonded to nitrogen, so hydrogen bonding is significant, but for CH4, hydrogen is bonded to carbon, which is not electronegative enough to cause hydrogen bonding, so hydrogen bonding is not significant in CH4.
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