Inter-molecular Forces

Hydrogen bonding occurs when hydrogen is bonded to N, O, or F.  Which of the following has hydrogen bonding?

• CBr₄
• NO₂
• H₂S
• NH₃

Which is the second strongest intermolecular force, after hydrogen bonding?

• dipole-dipole attraction
• London forces

London forces are stronger in heavier atoms or molecules, and weaker in lighter atoms or molecules.  Which of these has the strongest London forces?

• F₂
• Br₂
• I₂
• Cl₂

In general, substances with stronger intermolecular forces have ___________  boiling points than those with weaker intermolecular forces

• higher
• lower

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.

What type of interaction does this represent?

• non-polar covalent
• dipole
• dipole-dipole
• none that I know of

Tags

NGSS.HS-PS1-3

Nonpolar molecules will mix with

• nonpolar molecules only

• polar molecules only

• both polar and nonpolar molecules

What is viscosity?

• a measure of inward forces at the surface of a liquid
• a measure of the cohesive properties of a liquid
• a measure of the adhesive properties of a liquid
• resistance to flow of a liquid

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

Intermolecular forces are the forces

• within molecules
• between molecules