Intermolecular Forces of Attraction

Which of the following has the highest boiling point?

• H₂

• NH₃

• N₂

• O₂

Which of the following best describes Van der Waals forces?

• A type of chemical bond between atoms within a molecule

• Forces of attraction between molecules that are close together

• A strong force of attraction between ions and molecules

• The only type of intermolecular force present in ionic compounds

What is a key characteristic of hydrogen bonding?

• It occurs only between molecules containing hydrogen and carbon atoms

• It is a special type of dipole-dipole interaction involving a hydrogen atom bonded to a highly electronegative atom

• It is weaker than Van der Waals forces

• It requires the presence of a metal atom

Which of the following is NOT a type of Van der Waals force?

• Van der Waals forces

• Hydrogen bonds

• Dipole-induced dipole forces

• Permanent dipole-dipole forces

Which statement about dipole-dipole interactions is true?

• They are the strongest type of intermolecular force

• They occur between molecules where both have a permanent dipole

• They can only occur in solid state substances

• They are weaker than Van der Waals forces

Tags

NGSS.HS-PS2-6

Van der Waals forces are a result of:

• The movement of electrons creating temporary dipoles

• The sharing of electrons between two atoms

• The permanent separation of charge within a molecule

• The interaction between a hydrogen atom and an electronegative atom

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-6

Dipole-induced dipole forces occur when:

• A polar molecule induces a dipole in a nonpolar molecule

• Two polar molecules interact

• A nonpolar molecule induces a dipole in another nonpolar molecule

• Two nonpolar molecules interact

Which of the following substances would you expect to have the highest boiling point based on intermolecular forces?

• A substance with strong hydrogen bonding

• A substance with only Van der Waals forces

• A substance with dipole-dipole interactions

• A substance with ion-dipole interactions

The strength of Van der Waals forces depends on:

• The distance between the molecules

• The size of the molecules

• The presence of hydrogen atoms

• The polarity of the molecules

Tags

NGSS.HS-PS2-6

Why are ion-dipole interactions stronger than dipole-dipole interactions?

• Because ions have a complete charge while dipoles only have partial charges

• Because ion-dipole interactions only occur in aqueous solutions

• Because dipole-dipole interactions are temporary

• Because ions are smaller than molecules