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Worksheets

Polarity, IMF, Molecule Shapes

Total questions: 73

Worksheet time: 1hrs 5mins

Name
Class
Date
1.
In covalent bonds, electrons are ___________.
a)
transferred
b)
gained
c)
lost
d)
shared
2.
In a polar covalent bond, electrons are shared ___________.
a)
equally
b)
unequally
c)
between non-metals with similar electronegativities
d)
between a metal and a non-metal
3.
A bond with a partially negative end and a partially positive end is:
a)
ionic
b)
polar
c)
non-polar
d)
isometric
4.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

5.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

6.

Is this molecule polar or non-polar?

a)

Non-polar

b)

Polar

7.
A diatomic molecule like O2 is always_______ because electrons are shared ________.
a)
nonpolar; equally
b)
polar; equally
c)
nonpolar; unequally
d)
nonpolar; unequally
8.
In this Lewis structure, the symbol above F means...
a)
electrons are being transferred to Fluorine
b)
electrons are less attracted to F than H
c)
electrons are more attracted to F than H
d)
Fluorine has formed a cation
9.

Would this molecule be more soluble in (more likely to mix with) a polar or nonpolar solution?

a)

Polar

b)

Nonpolar

c)

Neither

10.
What geometry will this molecular structure have?: PH3
a)
bent
b)
tetrahedral
c)
linear
d)
trigonal pyramidal
11.
What geometry will this molecular structure have?: H2S
a)
bent
b)
tetrahedral
c)
linear
d)
trigonal pyramidal
12.
What geometry will this molecular structure have?: CCl4
a)
bent
b)
tetrahedral
c)
linear
d)
trigonal pyramidal
13.

Would this molecule be more soluble in (more likely to mix with) a polar or nonpolar solution?

a)

Polar

b)

Nonpolar

c)

Neither

14.
Will this molecule be polar or nonpolar? H2S
a)
polar
b)
nonpolar
15.
What explains the very high melting and boiling point of water
a)
Strong dipole-dipole bonds between water molecules
b)
Strong hydrogen bonds between water molecules
c)
Dispersion forces which are present in all molecules
d)
Asymmetrical shape of the polar bonds.
16.
Does HCl have hydrogen bonding?
a)
yes
b)
no
17.
Intermolecular force present in HCl?
a)
dipole dipole
b)
dispersion
c)
H-bond
d)
ionic
18.

How many chemical bonds can each carbon atom form?

a)

one

b)

two

c)

three

d)

four

19.

Which substance has the weakest intermolecular forces?

a)

Substance A, boiling point of 75 °C

b)

Substance B, boiling point of 105 °C

c)

Substance C, boiling point of 25 °C

d)

Substance d, boiling point of 45 °C

20.

Intermolecular forces for: CO2

a)

Dispersion Force

b)

Dipole dipole

c)

Hydrogen bonding

21.
 A lone pair is defined as
a)
A pair of bonding electrons
b)
One non-bonding electron
c)
A pair of non-bonding electrons
d)
A pair of electrons on the central atom
22.

What does "like dissolves like" mean?

a)

polar solvents dissolve in polar solutes

b)

polar solutes dissolve in polar solvents

c)

non-polar solvents dissolve in polar solutes

d)

non-polar solutes dissolve in polar solvents

23.

What does it mean when we say water is a "polar molecule"?

a)

The molecule is cold

b)

The molecule has ionic bonds

c)

The molecule has covalent bonds between its atoms

d)

It has partial positive and negative charges at opposite ends.

24.

What kind of solute will dissolve in a polar solution? (Select all that apply)

a)

polar covalent solvent

b)

nonpolar covalent solvent

c)

ionic solvent

d)

metallic solvent

25.
Which of the following shapes has unshared pairs of electrons on the central atom? 
a)
Bipyramidal
b)
Bent
c)
Trigonal Planar
d)
Tetrahedral
26.
What molecule could this be? 
a)
BF3
b)
CH4
c)
H2O
d)
CO2
27.
Who could this molecule be?
a)
CH4
b)
CO2
c)
PCl5
d)
BF3
28.

Who could this be? (The purple cloud represents a lone pair!)

a)
H2O
b)
NH3
c)
CO2
d)
CH4
29.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
30.

Which is the correct Lewis structure for carbon dioxide?

a)
b)
c)
d)
31.

Which of the following best explain how to determine the shape of the molecule above?

a)

there are 3 atoms bonded to the central atom and 2 lone pairs

b)

there are single bonds

c)

there are 3 atoms bonded to the central atom and 0 lone pairs of electrons on the central atom

32.

What is the molecular shape of H2S?

a)

linear

b)

trigonal planar

c)

bent

d)

tetrahedral

33.
A Nitrogen molecule (N2) has one triple bond. How many electrons do the nitrogen atoms share?
a)
1
1
b)
3
c)
4
d)
6
34.
Does HCl have hydrogen bonding?
a)
yes
b)
no
35.
Does CH4 have hydrogen bonding?
a)
yes
b)
no
36.

What shape would a molecule have if it has 4 bonded pairs around its central atom? (It may help if you sketch this out)

a)

Linear

b)

Trigonal planar

c)

Tetrahedral

d)

Bent

37.
A bond with a partially negative end and a partially positive end is:
a)
ionic
b)
polar
c)
non-polar
d)
isometric
38.

If sodium and oxygen formed a bond, it would be classified as --

a)

polar covalent

b)

nonpolar covalent

c)

ionic

d)

metallic

39.

Which electrons are involved in a chemical bond?

a)

Valence electrons

b)

Inner shell electrons

c)

Electrons are not involved in bonding

40.

__________ bonds involve an unequal sharing of electrons, while __________ bonds involve an equal sharing of electrons.

a)

Nonpolar, polar

b)

Polar, metallic

c)

Metallic, nonpolar

d)

Polar, nonpolar

41.
In this Lewis structure, the symbol above F means...
a)
electrons are being transferred to Fluorine
b)
electrons are less attracted to F than H
c)
electrons are more attracted to F than H
d)
Fluorine has formed a cation
42.

If boron (eneg: 1.5) forms a covalent bond with bromine (eneg: 2.8), which end of the bond will be partially positivie?

a)

the boron end

b)

the bromine end

43.

Which type of IMF is responsible for the attraction pictured above?

a)

Dipole-Dipole Interaction

b)

Ion-Dipole Interaction

c)

Hydrogen Bonds

d)

Covalent Bond

e)

Ionic Bond

44.

Which of the following has hydrogen bonding?

a)
b)
c)
d)
45.

The polarity of a bond is determined by...

a)

The sum of the electronegativities of the two atoms

b)

The difference in the electronegativities of the two atoms

c)

The charges of the atoms

d)

None of the Above

46.

Wax is a nonpolar solid. Hexane is a nonpolar liquid.

Will wax dissolve in hexane?

a)

YES because they are both nonpolar

b)

YES because their names both contain an "x"

c)

NO because at least one substance has to be polar to dissolve.

d)

NO because solids can't dissolve in liquids.

47.

Is this molecule polar or nonpolar?

a)

Polar

b)

Nonpolar

48.

Is this molecule polar or nonpolar?

Draw in the dipole arrows!

a)

Polar

b)

Nonpolar

49.

Is this molecule polar or nonpolar?

Draw in the dipole arrows!

a)

Polar

b)

Nonpolar

50.

Is this molecule polar or nonpolar?

Draw in the dipole arrows!

a)

Polar

b)

Nonpolar

51.
Which of these has the strongest London forces?
a)
F2
b)
Br2
c)
Cl2
d)
I2
52.

Stronger IMFs result in ..................... of the melting and boiling points of the substance.

a)

an increase

b)

a decrease

c)

no change

53.
Hydrogen bonding occurs when hydrogen is bonded to N, O, or F.  Which of the following has hydrogen bonding?
a)
CBr4
b)
NO2
c)
H2S
d)
NH3
54.

What is the molecular shape for HCN and is it polar or nonpolar?

a)

bent; polar

b)

bent; nonpolar

c)

linear; polar

d)

linear; nonpolar

55.

What is responsible for water's unique properties such as high boiling point, strong surface tension, and slow to evaporate?

a)

It has strong hydrogen bonding

b)

ionic bonding

c)

it has only London dispersion forces present

d)

it's linear shape

56.

What is the shape and polarity of H2O?

a)

linear; nonpolar

b)

linear; polar

c)

bent; polar

d)

bent; nonpolar

57.

Which of the following forces are found between two NONPOLAR molecules?

a)

London Dispersion Force

b)

Dipole-dipole

c)

Hydrogen bond

58.

Why does water bead on a clean window?

a)

Water has a strong IMF ~ high surface tension and stick together and resist spreading out

b)

Water has a weak IMF ~ weak surface tension and stick together and resist spreading out

59.

A weak IMF will result in a

a)

high melting point

b)

high viscosity

c)

high surface tension

d)

low surface tension

60.

List the three IMFs from strongest to weakest.

a)

Hydrogen Bond, London Dispersion, Dipole-dipole

b)

London Dispersion, Dipole-dipole,

Hydrogen Bond

c)

Hydrogen Bond, Dipole-dipole, London Dispersion

d)

Dipole-dipole, Hydrogen Bond, London Dispersion

61.

Which type of IMF is responsible for the attraction pictured above? Choose the strongest IMF present.

a)

Dipole-Dipole Interaction

b)

London Dispersion

c)

Hydrogen Bonds

d)

Ionic Bond

62.

The strength of temporary dipoles that occur in London Dispersion forces:

a)
increases with the size of molecules
b)

is greater than intramolecular forces

c)
is the strongest intermolecular force
63.

What leads to the bent shape of this molecule?

a)

bonds

b)

electrons

c)

protons

d)

lone pairs

64.

What is the shape of this molecule?

a)

bent

b)

linear

c)

trigonal pyramidal

d)

trigonal planar

65.

The shape of this molecule is...

a)

tetrahedral

b)

linear

c)

trigonal pyramidal

d)

trigonal planar

66.

The reason why there is an arrow pointing towards the F is:

a)

it is a polar bond

b)

it is a non-polar bond

c)

it is an ionic bond

d)

fluorine has the highest electronegativity

e)

the F side of the molecule has a partial negative because the electrons are around F

67.

What IMFs are possible in polar molecules that do NOT have Hydrogen?

a)

London Dispersion Forces

b)

Dipole dipole forces

c)

Hydrogen Bond

68.

The weakest IMF is

a)

London Dispersion Forces

b)

Dipole dipole forces

c)

Hydrogen Bond

69.

What IMF does a polar molecule have when there is a Hydrogen but the Hydrogen is NOT bonded to N, O, or F?

a)

London Dispersion Forces

b)

Dipole dipole forces

c)

Hydrogen Bond

70.

Oil does not dissolve in/mix with water because

a)

they have different densities.

b)

one is ionically-bonded and the other is covalently-bonded.

c)

one is polar and the other is non-polar.

d)

oil is more viscous than water.

71.
A water strider can skate along the top of a pond because:
a)
covalent bonds result in water cohesion
b)
hydrogen bonds result in water cohesion (surface tension)
c)
water striders have adapted to take advantage of water cohesion
d)
low surface tension of water
72.

The attraction that causes water and other liquids to form drops on surfaces is called ________________. This is also water’s ability to be attraction to other water molecules.

a)
adhesion
b)
capillary action
c)
cohesion
d)
surface tension
73.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive