Chemistry: Intermolecular Forces & Properties Flashcards
7 cards from real AP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Chemistry: Intermolecular Forces & Properties flashcards as text
Which molecule is polar and therefore has dipole-dipole forces?
Answer: CHCl3
CHCl3 is asymmetric, so its bond dipoles do not cancel, making it polar.
Polarizability of a molecule increases with:
Answer: A larger, more diffuse electron cloud
Larger electron clouds distort more easily, increasing polarizability and dispersion forces.
Why does HF have a higher boiling point than HCl despite HCl having greater molar mass?
Answer: HF forms hydrogen bonds
Fluorine's high electronegativity lets HF hydrogen bond, outweighing HCl's larger mass.
Which best explains why oil and water do not mix?
Answer: Nonpolar oil cannot form favorable interactions with polar water
Like dissolves like; nonpolar oil cannot disrupt water's hydrogen-bonding network favorably.
A solid that is soft, has a low melting point, and does not conduct electricity is most likely a:
Answer: Molecular solid
Molecular solids are held by weak intermolecular forces, giving low melting points and no conductivity.
Which has the strongest intermolecular forces?
Answer: Glycerol (multiple OH groups)
Glycerol's three OH groups allow extensive hydrogen bonding, the strongest among these.
Increasing temperature affects intermolecular forces by:
Answer: Giving molecules energy to overcome them
Added kinetic energy lets molecules break free of attractive forces, favoring gas formation.