AP Chem-gases, solids, liquids

Which of the following is the strongest intermolecular force?

• London dispersion forces

• Covalent bonds

• Hydrogen Bonds

• Dipole-Dipole interactions

Strong intermolecular forces cause which of the following:

• Low surface tension

• Low viscosity

• Low vapor pressure

• Low boiling point

As an ice cube melts, what happens to the temperature of the water involved?

• It increases

• It decreases

• It remains constant

• All of the above

In a nonpolar molecule, what determines the boiling point?

• Molar mass

• Hydrogen bonding

• Number of Electrons

• Number of Neutrons

Why does the process of vaporization take longer than the process of melting?

• Intermolecular forces are completely overcome during vaporization

• Intermolecular forces in the solid phase are weaker than in the liquid phase

• Electron clouds of methane molecules are less polarizable at lower temperatures.

• Vaporization involves a large increase in temperature.

Average kinetic energy is determined by what things?

• molar mass and intermolecular forces

• velocity and intermolecular forces

• molar mass and velocity

• velocity and temperature

Paper chromatography uses which of the following to separate substances?

• Molar mass

• Polarity

• Boiling point

• Magnetism

Distillation separates substances based on:

• molar mass

• boiling point

• magnetism

• polarity

When a sample of gas is cooled until its absolute temperature (temp in K) is halved, which of the following is also halved?

• Density

• Pressure

• Average velocity

• Potential energy

A solid white crystalline substance with a low melting point, that does not conduct electricity as a solid or dissolved in water, is which of the following:

• Ionic

• Metallic

• Network covalent

• Molecular