Intermolecular Forces Review
Questions
1) Which of the following correctly lists the forces of
attraction in order from weakest to strongest?
A) Ionic bonding < dipole < hydrogen bonding < dispersion
B) Dipole < dispersion < hydrogen bonding < ionic bonding
C) Dispersion < dipole < hydrogen bonding < ionic bonding
D) Dispersion < hydrogen bonding < dipole < ionic bonding
E) Dipole < hydrogen bonding < ionic bonding < dispersion
2) How many hydrogen bonds are shown in the drawing
below?
A)
B)
C)
D)
E)
0
1
2
5
6
3) Which drawing below represents what happens to the
atoms/molecules of methanol (CH3OH) after it boils?
4) Which of the following correctly explains why hexane
(C6H14) has a higher boiling point than propane (C3H8)?
A) Hexane has more bonds than propane, so it’s harder to
break.
B) Molecules of hexane are more strongly attracted to
each other than molecules of propane.
C) Hexane is heavier than propane, so gravity holds it
together.
D) Hexane is more polar than propane, holding it together
better.
5) Which molecule(s) below is/are polar?
A) CH4
B) CO2
C) H2O
D) SF2
E) CF4
6) Which picture below shows how two molecules of
formaldehyde (CH2O) would likely arrange themselves
near each other?
A)
B)
C)
D)
7) Which of the following explains why NaCl has a much
higher melting point than HCl?
A) NaCl has less electronegativity than HCl, so it is more
strongly held together.
B) The charges that attract NaCl particles are larger than
the charges that attract HCl particles.
C) NaCl is ionic and HCl is covalent, and ionic bonds are
stronger than covalent bonds.
D) NaCl has a greater mass than HCl, so its attraction is
stronger.
8) How many hydrogen bonds are shown in the drawing
below?
A) 0
B) 2
C) 6
D) 8
E) 18
9) Choose the best answer from below for this question:
Which has a higher boiling point, CO2 or CS2? Why?
A) CO2 because it has a greater total electronegativity.
B) CO2 because it has stronger covalent bonds.
C) CO2 because it is polar while CS2 is nonpolar.
D) CS2 because it is nonpolar while CO2 is polar.
E) CS2 because it has stronger dispersion forces.
10) What function group is NOT present in the molecule
below?
A) Alcohol
B) Carboxylic acid
C) Amine
D) Ester
11) Which substance(s) below most likely have a
smell? (You may choose more than one).
A) KBr
B) C6H12O2
C) H2S
D) CH2Cl2
E) CF4
F) C60H120O10
Vocab List
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molecular formula
structural formula
Isomer
Lewis dot symbol
Lewis dot structure
bonded (or bonding) pair
lone pair
octet rule
single bond
double bond
triple bond
functional group
•electron domain
•tetrahedral shape
•pyramidal shape
•bent shape
•trigonal planar shape
•linear shape
•receptor site
•polar molecule
•nonpolar molecule
•intermolecular forces
•Dipole
•Electronegativity
•polar covalent bond
nonpolar covalent bond
•ionic bond
•dipole-dipole attraction
•ESDABOPH (a.k.a.
hydrogen bonding)
•dispersion forces
•Volatile
•surface tension