Intermolecular Forces and Properties Practice

Which of the following properties is not affected by intermolecular forces?

• Color

• Melting point

• Surface tension

• Viscosity

Which of these substances is expected to have the highest boiling point?

• NH₃

• NF₃

• C₂H₆

• C₄H₈

Tags

NGSS.HS-PS1-3

What is the relationship between vapor pressure and intermolecular forces?

• Vapor pressure does not depend upon intermolecular forces, only the strength of chemical bonds.

• Stronger intermolecular forces cause particles to repel each other, raising the vapor pressure.

• Stronger IMFs cause particles to stick together, lowering the vapor pressure.

• Intermolecular forces cause all liquids to have the same vapor pressure.

Based on the strength of intermolecular forces, which would you expect to have the highest vapor pressure?

• NF₃

• NH₃

• CH₄

• C₅H₁₂

Tags

NGSS.HS-PS1-3

Compare the viscosity of CH₃OH and CH₃Cl

• You cannot predict viscosity without knowing the color of the liquid

• CH₃Cl is more viscous because it has a greater mass than CH₃OH

• CH₃Cl is more viscous because CH₃OH has hydrogen bonds while CH₃Cl's strongest force is dipole-dipole

• CH₃OH is more viscous because CH₃OH has hydrogen bonds while CH₃Cl's strongest force is dipole-dipole

Select the correct order of molecules from lowest to highest boiling point, based on intermolecular forces.

• CH₄ < C₂H₆ < H₂O < SO₂

• H₂O < SO₂ < C₂H₆ < CH₄

• C₂H₆ < CH₄ < H₂O < SO₂

• CH₄ < C₂H₆ < SO₂ < H₂O

Ionic bonds and covalent bonds are ____ than intermolecular forces

• Stronger

• Weaker

Tags

NGSS.HS-PS1-3

Which of the following will have a higher melting point?

• NaCl because it has ionic bonds

• HF because it has hydrogen bonding

Tags

NGSS.HS-PS1-3

A liquid evaporates very quickly. What type of intermolecular force(s) would you expect to be present?

• London dispersion, dipole-dipole, and hydrogen bonding

• London dispersion and dipole-dipole

• Only London dispersion forces

Which of these melts at the highest temperature?

• CH₄

• NaBr

• H₂O

• SeO

Tags

NGSS.MS-PS3-4