Question 1

You are interested in determining the solubility of ionic compounds in solvents other than water,and you decide to try liquid ammonia,NH3.Which of the following statements regarding your experiment is probably true?

Accepted Answer

A)  The hydrogen ions in ammonia have partial negative charges and can stabilize Na+ in solution.
B)  The molecular dipole moment is too small to effectively interact with ions.
C)  The hydrogen atoms in ammonia would orient toward both ions equally.
D)  The lone pair of electrons on ammonia can act in a similar way as the lone pairs on oxygen in water.
E)  Ion-dipole interactions exist only in water.F) A) and E)
G) A) and B)

Question 2

Which of the following pairs of compounds is most likely to be immiscible?

Accepted Answer

A)  Br2 and C6H6
B)  H2O and CH3CH2OH
C)  CCl4 and H2CO
D)  CH3OH and CH3CH2OH
E)  H2O and NH3F) A) and E)
G) A) and B)

Question 3

The relative energies (strengths) of the intermolecular forces present in each of four different pure substances are shown in the figure below.Which substance is most likely to be a solid at room temperature?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) C) and E)
G) A) and C)

Question 4

For the following organic molecules,arrange them in order of increasing intermolecular forces and give your reasoning.
a.  
b.  
c.

Accepted Answer

By letter,intermolecular force...

Question 5

Which of the following liquids will have the highest surface tension?

Accepted Answer

A)  dimethylamine,(CH3) 2NH
B)  dimethylsulfide,(CH3) 2S
C)  water,H2O
D)  1-propanol,CH3CH2CH2OH
E)  ethylene glycol,HOCH2CH2OHF) B) and C)
G) D) and E)

Question 6

The boiling points of group IVA hydrides increases in the order,CH4 4 4 4.Which molecule experiences the strongest attractive forces and why?

Accepted Answer

SnH₄,because higher b...

Question 7

Which of the following molecules will have the highest boiling point?

Accepted Answer

A)  CO2
B)  C6H6 (benzene) 
C)  C6F6 (hexafluorobenzene) 
D)  C2H2
E)  CF4F) All of the above
G) B) and D)

Question 8

The temperature at point b in the phase diagram below is the __________

Accepted Answer

A)  critical point.
B)  triple point.
C)  transition point.
D)  normal freezing point.
E)  normal boiling point.F) C) and D)
G) A) and E)

Question 9

Polarizability refers to __________

Accepted Answer

A)  the ease with which the electron cloud of an atom or molecule can be distorted.
B)  the magnitude of the dipole moment of a molecule.
C)  the ease with which a hydrogen bond can form.
D)  the perturbation in electron density because of hydrogen bonding.
E)  the ability to transmit polarized light.F) A) and B)
G) A) and C)

Question 10

Which of the following compounds do you expect to be most soluble in water?

Accepted Answer

A)  CO2
B)  CCl4
C)  O2
D)  SiO2
E)  NH3F) A) and B)
G) C) and D)

Question 11

Indicate which of the following molecules exhibits the greatest dispersion forces.

Accepted Answer

A)  CH3CH3
B)  CH3CH2CH3
C)  C2H2
D)  CH4
E)  CH3CH2CH2CH3F) A) and D)
G) B) and C)

Question 12

The relative energies (strengths) of the intermolecular forces present in each of five different pure substances are shown in the figure below.Which substance has the lowest melting point?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) None of the above
G) A) and B)

Question 13

Which of the following compounds is capable of hydrogen bonding?

Accepted Answer

A)  CH3OCH3
B)  CH3COCH3
C)  CH3CH2OH
D)  H2CO
E)  CH3FF) A) and C)
G) C) and E)

Question 14

Sketch a phase diagram for water and correctly label all the parts (areas,lines,points,key temperatures).

Accepted Answer

Boiling points can also be cal...

Question 15

Which of the following representations best shows the formation of an instantaneous dipole moment between two nonpolar molecules?

Accepted Answer

A)   
B)   
C)   
D)   
E)  none of theseF) C) and E)
G) None of the above

Question 16

Which of the following statements is incorrect?

Accepted Answer

A)  The more electrons in an atom,the more likely it is that they will be asymmetrically distributed.
B)  The more electrons in an atom,the stronger the dispersion forces it can experience.
C)  Larger atoms may experience larger temporary dipoles.
D)  Atoms lower in the periodic table probably experience larger dispersion forces.
E)  As the strength of temporary dipoles decreases within a substance,the boiling point increases.F) A) and C)
G) None of the above

Question 17

Which of the following compounds will have the strongest dipole-dipole interactions between its molecules?

Accepted Answer

A)  CF4
B)  CH4
C)  CH3F
D)  CH2F2
E)  CH3ClF) A) and D)
G) C) and D)

Question 18

Arrange the following in order of increasing boiling point: (a)dimethyl ether; (b)n-propane; (c)ethylene oxide; and (d)acetaldehyde (shown in order).
a.  
b.  
c.  
d.

Accepted Answer

Boiling point increa...

Question 19

When an ion is dissolved in water,which of the following intermolecular forces are in effect: ion-dipole forces,dipole-dipole forces,and/or dispersion forces?

Accepted Answer

A)  dispersion forces
B)  dipole-dipole forces
C)  ion-dipole forces
D)  ion-dipole forces and dispersion forces
E)  all of theseF) None of the above
G) A) and B)

Question 20

Explain why the boiling point of nitrogen (N2,77 K)is much lower than that of carbon monoxide (CO,84 K)even though both have the same number of electrons and protons and nearly the same mass.

Accepted Answer

CO is polar,and the ...

Exam 6: Intermolecular Forces-Attractions Between Particles

Which of the following compounds will have the strongest dipole-dipole interactions between its molecules?

Correct AnswerverifiedShow Answer

The temperature at point b in the phase diagram below is the __________

Correct AnswerverifiedShow Answer

For the following organic molecules,arrange them in order of increasing intermolecular forces and give your reasoning. a. b. c.

Correct AnswerverifiedBy letter,intermolecular force...View AnswerShow Answer

Which of the following statements is incorrect?

Correct AnswerverifiedShow Answer

You are interested in determining the solubility of ionic compounds in solvents other than water,and you decide to try liquid ammonia,NH3.Which of the following statements regarding your experiment is probably true?

Correct AnswerverifiedShow Answer

Which of the following pairs of compounds is most likely to be immiscible?

Correct AnswerverifiedShow Answer

The relative energies (strengths) of the intermolecular forces present in each of four different pure substances are shown in the figure below.Which substance is most likely to be a solid at room temperature?

Correct AnswerverifiedShow Answer

Polarizability refers to __________

Correct AnswerverifiedShow Answer

Sketch a phase diagram for water and correctly label all the parts (areas,lines,points,key temperatures).

Correct AnswerverifiedBoiling points can also be cal...View AnswerShow Answer

The boiling points of group IVA hydrides increases in the order,CH4 < SiH4 < GeH4 < SnH4.Which molecule experiences the strongest attractive forces and why?

Correct AnswerverifiedSnH4,because higher b...View AnswerShow Answer

Which of the following representations best shows the formation of an instantaneous dipole moment between two nonpolar molecules?

Correct AnswerverifiedShow Answer

When an ion is dissolved in water,which of the following intermolecular forces are in effect: ion-dipole forces,dipole-dipole forces,and/or dispersion forces?

Correct AnswerverifiedShow Answer

Arrange the following in order of increasing boiling point: (a)dimethyl ether; (b)n-propane; (c)ethylene oxide; and (d)acetaldehyde (shown in order). a. b. c. d.

Correct AnswerverifiedBoiling point increa...View AnswerShow Answer

The relative energies (strengths) of the intermolecular forces present in each of five different pure substances are shown in the figure below.Which substance has the lowest melting point?

Correct AnswerverifiedShow Answer

Which of the following compounds is capable of hydrogen bonding?

Correct AnswerverifiedShow Answer

Which of the following molecules will have the highest boiling point?

Correct AnswerverifiedShow Answer

Which of the following compounds do you expect to be most soluble in water?

Correct AnswerverifiedShow Answer

Explain why the boiling point of nitrogen (N2,77 K)is much lower than that of carbon monoxide (CO,84 K)even though both have the same number of electrons and protons and nearly the same mass.

Correct AnswerverifiedCO is polar,and the ...View AnswerShow Answer

Indicate which of the following molecules exhibits the greatest dispersion forces.

Correct AnswerverifiedShow Answer

Which of the following liquids will have the highest surface tension?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
By letter,intermolecular force...
View Answer

Correct Answer
verified

You are interested in determining the solubility of ionic compounds in solvents other than water,and you decide to try liquid ammonia,NH₃.Which of the following statements regarding your experiment is probably true?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Boiling points can also be cal...
View Answer

The boiling points of group IVA hydrides increases in the order,CH₄ < SiH₄ < GeH₄ < SnH₄.Which molecule experiences the strongest attractive forces and why?

Correct Answer
verified
SnH₄,because higher b...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Boiling point increa...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Explain why the boiling point of nitrogen (N₂,77 K)is much lower than that of carbon monoxide (CO,84 K)even though both have the same number of electrons and protons and nearly the same mass.

Correct Answer
verified
CO is polar,and the ...
View Answer

Correct Answer
verified

Correct Answer
verified