Question 1

Indicate all the types of intermolecular forces of attraction in CF4(g).

Accepted Answer

A)  Dispersion and Dipole-dipole 
B)  Dipole-dipole and Ionic 
C)  Ion-dipole and Hydrogen bonding 
D)  Hydrogen bonding and Dispersion 
E)  Dispersion

Question 2

Sodium iodide, NaI, melts at 651$\circ$C. In its liquid state NaI conducts electricity. What kind of crystal is this

Accepted Answer

A)  Ionic Crystal 
B)  Covalent Crystal 
C)  Metallic Crystal 
D)  Molecular Crystal 
E)  Amorphous (Not a regular crystal)

Question 3

The most space efficient arrangement of spheres is found in which type(s) of atom arrangement
I. hexagonal close-packed
II. cubic close-packed
III. simple cubic
IV. body-centered cubic

Accepted Answer

A)  I only 
B)  II only 
C)  I and II 
D)  IV only 
E)  I, II, and IV

Question 4

Which of the following would be expected to have the lowest vapor pressure at room temperature

Accepted Answer

A)  ethanol, bp = 78$\circ$C 
B)  methanol, bp = 65$\circ$C 
C)  water, bp = 100$\circ$C 
D)  acetone, bp = 56$\circ$C

Question 5

The meniscus for water is curved upward at the edges (i.e., it is "concave up") because adhesion of water to glass is stronger than cohesion within water.

Accepted Answer

A) True 
 B)False

Question 6

The mineral manganosite, manganese(II) oxide, crystallizes in the rock salt structure (the face-centered structure adopted by NaCl) with a density of 5.365 g/cm3. Find the unit cell edge length of manganosite.

Accepted Answer

A)  280.0 pm 
B)  352.8 pm 
C)  368.2 pm 
D)  417.9 pm 
E)  444.5 pm

Question 7

Indicate all the types of intermolecular forces of attraction in HF(l).

Accepted Answer

A)  Dispersion and Dipole-dipole 
B)  Dipole-dipole and Ionic 
C)  Ion-dipole and Hydrogen bonding 
D)  Hydrogen bonding and Dispersion 
E)  Dispersion

Question 8

Glass is classified as a/an

Accepted Answer

A)  metallic crystal. 
B)  covalent solid. 
C)  molecular crystal. 
D)  amorphous solid. 
E)  ionic crystal.

Question 9

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm3. Calculate the length of the edge of the unit cell in pm.

Accepted Answer

A)  461 pm 
B)  361 pm 
C)  261 pm 
D)  161 pm 
E)  None of the above

Question 10

The molar heat of vaporization ($\Delta$Hvap) of H2Se is greater than H2O.

Accepted Answer

A) True 
 B)False

Question 11

Identify the dominant (strongest) type of intermolecular force present in NH3(l).

Accepted Answer

A)  Dispersion 
B)  Dipole-dipole 
C)  Ion-dipole 
D)  Hydrogen bonding 
E)  Ionic

Question 12

Indicate all the types of intermolecular forces of attraction in F2(l).

Accepted Answer

A)  Dispersion and Dipole-dipole 
B)  Dipole-dipole and Ionic 
C)  Ion-dipole 
D)  Hydrogen bonding 
E)  Dispersion

Question 13

Which of the following characteristics indicates the presence of weak intermolecular forces in a liquid

Accepted Answer

A)  a low heat of vaporization 
B)  a high critical temperature 
C)  a low vapor pressure 
D)  a high boiling point 
E)  None of the above.

Question 14

C5H12 is more viscous than C5H10(OH)2.

Accepted Answer

A) True 
 B)False

Question 15

Octane is a liquid component of gasoline. Given the following vapor pressures of octane at various temperatures, estimate the boiling point of octane in Leadville, Colorado, where the atmospheric pressure is 496 mmHg.400 mmHg @ 104$\circ$C, 500 mmHg @ 111$\circ$C, 600 mmHg @ 117$\circ$C, 700 mmHg @ 122$\circ$C, 760 mmHg @ 125$\circ$C

Accepted Answer

A)  125$\circ$C 
B)  120$\circ$C 
C)  115$\circ$C 
D)  110$\circ$C 
E)  105$\circ$C

Question 16

Arrange the following in order of increasing boiling point: RbCl, CH3Cl, CH3OH, CH4.

Accepted Answer

A)  CH3OH 3Cl 4 
B)  CH3OH 4 3Cl 3Cl 3OH 4 
D)  CH4 3OH 3Cl 4 3Cl 3OH < RbCl

Question 17

Arrange the following substances in order of increasing boiling point: CH3CH2OH, HOCH2CH2OH, CH3CH2Cl, and ClCH2CH2OH

Accepted Answer

A)  CH3CH2OH 2CH2OH 3CH2Cl 2CH2OH 
B)  CH3CH2Cl 3CH2OH 2CH2OH 2CH2OH 
C)  CH3CH2OH 3CH2Cl 2CH2OH 2CH2OH 
D)  CH3CH2Cl 2CH2OH 3CH2OH 2CH2OH 
E)  CH3CH2OH 2CH2OH 3CH2Cl 2CH2OH

Question 18

Which one of the following substances is expected to have the highest melting point

Accepted Answer

A)  CH4 
B)  CCl4 
C)  CO 
D)  CO2 
E)  C(diamond)

Question 19

Identify the dominant (strongest) type of intermolecular force present in Cl2(l).

Accepted Answer

A)  Dispersion 
B)  Dipole-dipole 
C)  Ion-dipole 
D)  Hydrogen bonding 
E)  Ionic

Question 20

Ethanol has a higher boiling point than dimethyl ether. (Ethanol and dimethyl ether have the same molecular formula, C2H6O. Their structural formulas are, respectively, CH3CH2OH and CH3OCH3.)

Accepted Answer

A) True 
 B)False

Exam 11: Intermolecular Forces and Liquids and Solids

Indicate all the types of intermolecular forces of attraction in CF₄(g) .

Sodium iodide, NaI, melts at 651^$\circ$C. In its liquid state NaI conducts electricity. What kind of crystal is this

The most space efficient arrangement of spheres is found in which type(s) of atom arrangement I. hexagonal close-packed II. cubic close-packed III. simple cubic IV. body-centered cubic

Which of the following would be expected to have the lowest vapor pressure at room temperature

The meniscus for water is curved upward at the edges (i.e., it is "concave up") because adhesion of water to glass is stronger than cohesion within water.

The mineral manganosite, manganese(II) oxide, crystallizes in the rock salt structure (the face-centered structure adopted by NaCl) with a density of 5.365 g/cm³. Find the unit cell edge length of manganosite.

Indicate all the types of intermolecular forces of attraction in HF(l) .

Glass is classified as a/an

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm³. Calculate the length of the edge of the unit cell in pm.

The molar heat of vaporization ( $\Delta$ H_vap) of H₂Se is greater than H₂O.

Identify the dominant (strongest) type of intermolecular force present in NH₃(l) .

Indicate all the types of intermolecular forces of attraction in F₂(l) .

Which of the following characteristics indicates the presence of weak intermolecular forces in a liquid

C₅H₁₂ is more viscous than C₅H₁₀(OH)₂.

Arrange the following in order of increasing boiling point: RbCl, CH₃Cl, CH₃OH, CH₄.

Arrange the following substances in order of increasing boiling point: CH₃CH₂OH, HOCH₂CH₂OH, CH₃CH₂Cl, and ClCH₂CH₂OH

Which one of the following substances is expected to have the highest melting point

Identify the dominant (strongest) type of intermolecular force present in Cl₂(l) .

Ethanol has a higher boiling point than dimethyl ether. (Ethanol and dimethyl ether have the same molecular formula, C₂H₆O. Their structural formulas are, respectively, CH₃CH₂OH and CH₃OCH₃.)

Exam 11: Intermolecular Forces and Liquids and Solids

Indicate all the types of intermolecular forces of attraction in CF4(g) .

Sodium iodide, NaI, melts at 651 ∘\circ∘ C. In its liquid state NaI conducts electricity. What kind of crystal is this

The most space efficient arrangement of spheres is found in which type(s) of atom arrangement I. hexagonal close-packed II. cubic close-packed III. simple cubic IV. body-centered cubic

Which of the following would be expected to have the lowest vapor pressure at room temperature

The meniscus for water is curved upward at the edges (i.e., it is "concave up") because adhesion of water to glass is stronger than cohesion within water.

The mineral manganosite, manganese(II) oxide, crystallizes in the rock salt structure (the face-centered structure adopted by NaCl) with a density of 5.365 g/cm3. Find the unit cell edge length of manganosite.

Indicate all the types of intermolecular forces of attraction in HF(l) .

Glass is classified as a/an

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm3. Calculate the length of the edge of the unit cell in pm.

The molar heat of vaporization ( Δ\DeltaΔ Hvap) of H2Se is greater than H2O.

Identify the dominant (strongest) type of intermolecular force present in NH3(l) .

Indicate all the types of intermolecular forces of attraction in F2(l) .

Which of the following characteristics indicates the presence of weak intermolecular forces in a liquid

C5H12 is more viscous than C5H10(OH)2.

Arrange the following in order of increasing boiling point: RbCl, CH3Cl, CH3OH, CH4.

Arrange the following substances in order of increasing boiling point: CH3CH2OH, HOCH2CH2OH, CH3CH2Cl, and ClCH2CH2OH

Which one of the following substances is expected to have the highest melting point

Identify the dominant (strongest) type of intermolecular force present in Cl2(l) .

Ethanol has a higher boiling point than dimethyl ether. (Ethanol and dimethyl ether have the same molecular formula, C2H6O. Their structural formulas are, respectively, CH3CH2OH and CH3OCH3.)

Indicate all the types of intermolecular forces of attraction in CF₄(g) .

Sodium iodide, NaI, melts at 651^$\circ$C. In its liquid state NaI conducts electricity. What kind of crystal is this

The mineral manganosite, manganese(II) oxide, crystallizes in the rock salt structure (the face-centered structure adopted by NaCl) with a density of 5.365 g/cm³. Find the unit cell edge length of manganosite.

Copper crystallizes in a face-centered cubic unit cell. The density of copper is 8.94 g/cm³. Calculate the length of the edge of the unit cell in pm.

The molar heat of vaporization ( $\Delta$ H_vap) of H₂Se is greater than H₂O.

Identify the dominant (strongest) type of intermolecular force present in NH₃(l) .

Indicate all the types of intermolecular forces of attraction in F₂(l) .

C₅H₁₂ is more viscous than C₅H₁₀(OH)₂.

Arrange the following in order of increasing boiling point: RbCl, CH₃Cl, CH₃OH, CH₄.

Arrange the following substances in order of increasing boiling point: CH₃CH₂OH, HOCH₂CH₂OH, CH₃CH₂Cl, and ClCH₂CH₂OH

Identify the dominant (strongest) type of intermolecular force present in Cl₂(l) .

Ethanol has a higher boiling point than dimethyl ether. (Ethanol and dimethyl ether have the same molecular formula, C₂H₆O. Their structural formulas are, respectively, CH₃CH₂OH and CH₃OCH₃.)