11 mark
What is the strongest type of intermolecular force exhibited in the amino acid molecule serine?
permanent dipole-dipole forces
London dispersion forces
hydrogen bonding
covalent bonding
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Intermolecular & Interparticle Forces (College Board AP® Chemistry)
Exam Questions
14 mins14 questions21 mark
Which of the following is a nonpolar molecule containing polar bonds?
C2H6
I2
CCl4
H-C≡C-H
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31 mark
Which of the following compounds does not form hydrogen bonds?
NH3
CH3CHFCH3
CH3CH(OH)CH3
CH2NH2
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41 mark
Which isomer of pentane shown above has the highest boiling point and why?
2,2-dimethylpropane because it can exhibit dipole-dipole forces.
Pentane because it is less compact than 2,2-dimethylpropane.
2,2-dimethylpropane because its molecules are more polarizable.
2,2-dimethylpropane because it has a greater molar mass than pentane.
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51 mark
The diagram above represents a particle in aqueous solution. Which of the following statements about the particle is correct?
The particle is an anion.
The particle does not have a charge.
The particle is a cation.
Water is a nonpolar molecule, so the charge of the particle cannot be determined.
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61 mark
Molecule | Boiling Point °C |
|---|---|
CH3CH2CHF2 | -42 |
CH3CH2CHCl2 | 35 |
CH3CH2CHBr2 | 73 |
Which of the following statements is correct?
The strongest type of intermolecular force in CH3CH2CHF2 is hydrogen bonding.
London dispersion forces account for the difference in boiling point.
The dipole-dipole interactions between CH3CH2CHBr2 are stronger than the dipole-dipole interactions between CH3CH2CHCl2.
The molecules only interact through London dispersion forces.
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71 mark
Which of the following compounds will not form hydrogen bonds?
CH2F2
CH3OH
H3NCH2CH2CH3
HOCH2CH2OH
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81 mark
Which of the following molecules will have the weakest dipole-dipole interactions?
CH3CN
CH2O
CCl4
H2S
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11 mark
Which of the following statements about propanone and propanal are correct?
I. The strongest type of intermolecular force in both molecules is hydrogen bonding
II. The strongest type of intermolecular force in both molecules is permanent dipole permanent dipole forces
III. Both compounds are soluble in water
I and II only
I and III only
II and III only
I, II and III
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21 mark
The correct order of increasing boiling points for the following compounds is
1-chlorobutane (CH3CH2CH2CH2Cl) < butane (C4H10) < butan-1-ol (CH3CH2CH2CHOH)
butan-1-ol (CH3CH2CH2CHOH) < 1-chlorobutane (CH3CH2CH2CH2Cl) < butane (C4H10)
butane (C4H10) < 1-chlorobutane (CH3CH2CH2CH2Cl) < butan-1-ol (CH3CH2CH2CHOH)
butan-1-ol (CH3CH2CH2CHOH) < butane (C4H10) < 1-chlorobutane (CH3CH2CH2CH2Cl)
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31 mark
Which of the cations is most likely to have the weakest attraction to an adjacent water molecule in solution?
Na+
Sr2+
Cs+
Ca2+
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41 mark
Which of the following is not a correct representation of hydrogen bonding?
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51 mark
What is the primary reason why lipids are insoluble in water?
Lipids have polar tails that cannot form hydrogen bonds with water molecules
Lipids are nonpolar and do not form hydrogen bonds with water molecules
Lipids form strong covalent bonds with themselves, preventing water solubility
Lipids form ion-dipole interactions that weaken their solubility
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11 mark
For the dissolution of an ionic compound to be exothermic, the energy released by the ion-dipole interactions in solution must be greater than which of the following?
The energy required to overcome hydrogen bonding between water molecules
The strength of the ionic bonds in the solid lattice
The covalent bond strength within the water molecules
The kinetic energy of the dissociated ions in solution
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