Multiple Choice
Which is the strongest intermolecular force present between two molecules of water in ice?
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13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
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Which is the strongest type of intermolecular force present in H_2 (hydrogen gas)?
A
Hydrogen bonding
B
Dipole-dipole interactions
C
Ion-dipole interactions
D
London dispersion forces
Verified step by step guidance1
Identify the molecular structure and polarity of H_2 (hydrogen gas). Since H_2 consists of two identical hydrogen atoms sharing electrons equally, it is a nonpolar molecule.
Recall that hydrogen bonding occurs only when hydrogen is directly bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine. Since H_2 does not have such bonds, hydrogen bonding is not possible.
Dipole-dipole interactions require polar molecules with permanent dipoles. Because H_2 is nonpolar, it does not exhibit dipole-dipole interactions.
Ion-dipole interactions occur between ions and polar molecules. Since H_2 is a neutral, nonpolar molecule and not an ion, ion-dipole interactions are not relevant here.
Recognize that the only intermolecular forces present in nonpolar molecules like H_2 are London dispersion forces, which arise from temporary fluctuations in electron distribution creating instantaneous dipoles.
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