Q: Which of the following correctly ranks the strength of intermolecular forces from weakest to strongest?

Dispersion < Dipole-dipole < Hydrogen bonding

Q: What is the main factor that determines the magnitude of dispersion forces in a molecule?

The molar mass and number of electrons in the molecule

Q: Which of the following best explains why ionic compounds dissolve in water?

Ion-dipole forces between water molecules and ions stabilize the ions in solution.

Q: A student is comparing the boiling points of CH\_3CH\_2CH\_2CH\_3 (butane) and CH\_3CH\_2OH (ethanol). Which statement best explains why ethanol has a higher boiling point?

Ethanol molecules can form hydrogen bonds, while butane molecules cannot.

Q: Which of the following best describes a dipole-dipole interaction?

An attraction between the positive end of one polar molecule and the negative end of another polar molecule

Q: Which of the following is a correct statement about hydrogen bonding?

Hydrogen bonding requires hydrogen to be bonded directly to N, O, or F.

Q: Which of the following best explains why the boiling point of HF is higher than that of HCl?

HF forms stronger hydrogen bonds than HCl.

Question 1

Which of the following statements best describes the difference between intermolecular forces and intramolecular forces?

Accepted Answer

Intramolecular forces hold atoms together within a molecule, while intermolecular forces are the attractive forces between molecules.

Question 2

Which type of intermolecular force is present in all substances, regardless of their polarity?

Accepted Answer

Dispersion (London) forces

Question 3

Which of the following molecules would exhibit hydrogen bonding?

Accepted Answer

NH\_3

Question 4

A sample of water (H\_2O) has a much higher boiling point than methane (CH\_4), even though their molar masses are similar. What is the primary reason for this?

Accepted Answer

Water molecules form hydrogen bonds, which are much stronger than the forces present in methane.

Question 5

Which of the following correctly ranks the strength of intermolecular forces from weakest to strongest?

Accepted Answer

Dispersion < Dipole-dipole < Hydrogen bonding

Question 6

Which of the following compounds would have the highest boiling point due to intermolecular forces?

Accepted Answer

CH\_3OH

Question 7

What is the main factor that determines the magnitude of dispersion forces in a molecule?

Accepted Answer

The molar mass and number of electrons in the molecule

Question 8

Which of the following best explains why ionic compounds dissolve in water?

Accepted Answer

Ion-dipole forces between water molecules and ions stabilize the ions in solution.

Question 9

Which of the following molecules would have only dispersion forces as its intermolecular force?

Accepted Answer

CO\_2

Question 10

A student is comparing the boiling points of CH\_3CH\_2CH\_2CH\_3 (butane) and CH\_3CH\_2OH (ethanol). Which statement best explains why ethanol has a higher boiling point?

Accepted Answer

Ethanol molecules can form hydrogen bonds, while butane molecules cannot.

Question 11

Which equation best represents the relationship between the energy required to overcome intermolecular forces and the boiling point of a substance?

Accepted Answer

$E \propto T_{b}$

Question 12

Which of the following is NOT a factor that affects the strength of dispersion forces?

Accepted Answer

Presence of permanent dipoles

Question 13

Which of the following best describes a dipole-dipole interaction?

Accepted Answer

An attraction between the positive end of one polar molecule and the negative end of another polar molecule

Question 14

Which of the following substances would you expect to have the lowest melting point?

Accepted Answer

CH\_4

Question 15

Which intermolecular force is most important in determining the solubility of NaCl in water?

Accepted Answer

Ion-dipole forces

Question 16

Which of the following molecules would have the highest vapor pressure at room temperature?

Accepted Answer

CH\_4

Question 17

Which of the following is a correct statement about hydrogen bonding?

Accepted Answer

Hydrogen bonding requires hydrogen to be bonded directly to N, O, or F.

Question 18

Which of the following best explains why the boiling point of HF is higher than that of HCl?

Accepted Answer

HF forms stronger hydrogen bonds than HCl.

Question 19

Which of the following is the strongest type of intermolecular force present in a mixture of NaCl dissolved in water?

Accepted Answer

Ion-dipole forces

Liquids, Solids, and Intermolecular Forces: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards