As molecular mass increases, which of the following intermolecular forces becomes most prominent?
A
Dispersion forces
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B
Dipole-dipole forces
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C
Hydrogen bonding
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D
Ionic bonding
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Solution
The correct option is B Dispersion forces Dispersion forces that develop between atoms in different molecules can attract the two molecules to each other. The forces are relatively weak, however, and become significant only when the molecules are very close. Larger and heavier atoms and molecules exhibit stronger dispersion forces than do smaller and lighter atoms and molecules.