🃏 Flashcard Set: 4 Intermolecular Forces

Question 1

What is the weakest intermolecular force that exists in all molecules?

Answer 1

London Dispersion Forces (LDF) – Temporary attractions from shifting electrons. Present in all molecules, especially nonpolar ones.

Question 2

Which force occurs between polar molecules due to permanent partial charges? (a positive and a negative end)

Answer 2

Dipole-Dipole Interactions – Positive end of one polar molecule attracts the negative end of another.

Question 3

What is a strong type of dipole interaction that occurs when H bonds to N, O, or F?

Answer 3

Hydrogen Bonding – Strong attraction between H and highly electronegative atoms like N, O, or F. Example: water (H₂O).

Question 4

Which intermolecular force occurs between a charged ion and a polar molecule?

Answer 4

Ion-Dipole Forces – Strongest of the four. Full charge on ion attracts partial charge on a polar molecule. Example: Na⁺ with H₂O.

Question 5

List the 4 intermolecular forces in order of increasing strength.

Answer 5

London Dispersion

Dipole-Dipole

Hydrogen Bonding

Ion-Dipole

Question 6

What kind of intermolecular forces does CH₄ (methane) have?

Answer 6

Only London Dispersion Forces – CH₄ is nonpolar.

Question 7

What kind of forces are involved when salt (NaCl) dissolves in water?

Answer 7

Ion-Dipole Forces – Between Na⁺/Cl⁻ ions and polar H₂O molecules.

Question 8

What is the strongest intermolecular force present in F2?

Answer 8

London Dispersion

Question 9

What is the strongest intermolecular force present in H2O?

Answer 9

Hydrogen Bonding

Question 10

What is the strongest intermolecular force present in CF4

Answer 10

London Dispersion

Question 11

What is the strongest intermolecular force present in CO₂?

Answer 11

London Dispersion

Question 12

What is the strongest intermolecular force present in NH₃ (ammonia)?

Answer 12

Hydrogen Bonding

Question 13

What is the strongest intermolecular force present in HCl?

Answer 13

Dipole-Dipole