AP Chemistry: Intermolecular Forces & Properties 2

Question 1

Which intermolecular force is responsible for the unusually high boiling point of water compared to H2S?

Accepted Answer

Hydrogen bonding

Answer

London dispersion forces

Answer

Ion-dipole forces

Answer

Covalent bonding

Question 2

Which molecule exhibits ONLY London dispersion forces?

Accepted Answer

CH4

Answer

NH3

Answer

H2O

Answer

HCl

Question 3

As molar mass increases among nonpolar molecules, London dispersion forces generally:

Accepted Answer

Increase

Answer

Decrease

Answer

Stay constant

Answer

Disappear

Question 4

Which pair of molecules can form hydrogen bonds with each other?

Accepted Answer

NH3 and H2O

Answer

CH4 and CO2

Answer

CH4 and CCl4

Answer

Cl2 and Br2

Question 5

Dipole-dipole forces occur between molecules that are:

Accepted Answer

Polar

Answer

Nonpolar

Answer

Monatomic

Answer

Ionic only

Question 6

Which has the strongest intermolecular forces at room temperature?

Accepted Answer

Liquid water

Answer

Helium gas

Answer

Neon gas

Answer

Methane gas

Question 7

Ion-dipole forces are most important in which situation?

Accepted Answer

Dissolving NaCl in water

Answer

Boiling pure nitrogen

Answer

Melting solid iodine

Answer

Subliming dry ice