Intermolecular forces

Which sample has hydrogen bonding?

• H₂S

• CH₄

• NH₃

• HI

Water has an unusually high boiling point for a molecular compound because it has

• hydrogen bonding

• ion-ion attractions

• a high density

• a large gram formula mass

Which substance has the weakest intermolecular forces?

• Substance A, boiling point of 75 °C

• Substance B, boiling point of 105 °C

• Substance C, boiling point of 25 °C

• Substance d, boiling point of 45 °C

What explains the very high melting and boiling point of water

• Strong dipole-dipole bonds between water molecules
• Strong hydrogen bonds between water molecules
• Dispersion forces which are present in all molecules
• Asymmetrical shape of the polar bonds.

Does H₂O have hydrogen bonding?

• yes
• no

Does HF have hydrogen bonding?

• yes
• no

Intermolecular force present in HCl?

• dipole dipole
• dispersion
• H-bond
• ionic

What information do we look for on the periodic table if we  want to examine intermolecular forces?

• atomic mass
• atomic number
• electronegativity
• ionization 

The correct ranking of intermolecular forces in order of greatest to least

• dipole-dipole, Hydrogen bonding, van der Waal forces

• van der Waal forces, hydrogen bonding, dipole-dipole attraction

• Hydrogen bonding, dipole-dipole attraction, van der Waals forces

• van der waal forces, dipole-dipole attractions, Hydrogen bonding

Intermolecular forces are the forces

• within molecules

• between molecules