Question

intermolecular forces
quiz complete
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van der waals forces can best be described as the attractive or repulsive forces that are formed
between oppositely charged ions in a crystal.
during dipole-dipole interactions between molecules.
when molecules move apart in the absence of other forces.
by a random, short-lived redistribution of electrons.

Explanation:

Waals component is temporary electron redistribution).

• Option C is incorrect as van der Waals forces include attractive forces that draw molecules together, not just when molecules move apart.
• Option D correctly defines the fundamental origin of London dispersion forces, a key type of van der Waals force, arising from temporary, random electron shifts creating instantaneous dipoles.

Answer:

Waals component is temporary electron redistribution).

• Option C is incorrect as van der Waals forces include attractive forces that draw molecules together, not just when molecules move apart.
• Option D correctly defines the fundamental origin of London dispersion forces, a key type of van der Waals force, arising from temporary, random electron shifts creating instantaneous dipoles.