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Forces of Attraction

Total questions: 20

Worksheet time: 15mins

Name
Class
Date
1.
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.
2.

Which substance would have the weakest intermolecular forces of attraction?

a)

CH4

b)

NaCl

c)

H2O

d)

MgF2

3.

Which is the strongest intermolecular force below

a)

Ionic

b)

Dispersion

c)

Hydrogen

d)

Metallic

4.
What is the basis of a metallic bond?
a)
the attraction of neutral metal atoms.
b)
the attraction between protons and neutrons.
c)
the attraction between positive metal ions and interlocking electrons.
d)
the attraction between positive metal ions and free floating electrons.
5.

Propane is a gas, while bromine is a liquid. Which statement correctly explains these observations? Both are at the same temperature.

a)

Bromine has weaker intermolecular forces than propane does

b)

Bromine has greater molecular polarity than propane does

c)

Bromine has weaker molecular polarity than propane does

d)

Bromine has stronger intermolecular forces than propane does

6.
How many electrons should Oxygen have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
7.
Which of the following is the correct Lewis structure for the compound PBr3?
a)
structure A
b)
structure B
c)
structure C
d)
structure D
8.
In the correct Lewis structure for CH4, how many unshared electron pairs surround the carbon?
a)
2
b)
8
c)
0
d)
4
9.

Which is NOT an intramolecular force?

a)

Polar Covalent Bond

b)

Nonpolar Covalent Bond

c)

London Dispersion Force

d)

Ionic Bond

10.

Electrons that are free to move in metals are

a)

delocalized electrons

b)

oxidation number

c)

chemical bond

d)

salts

11.

Which of the following types of bonding results in materials which are malleable and ductile?

a)

ionic bonding

b)

metallic bonding

c)

covalent bonding

12.

Which of the following types of bonding results in materials which have the highest melting and boiling points?

a)

ionic bonding

b)

metallic bonding

c)

covalent bonding

13.

Which of the following is an intramolecular force?

a)

hydrogen bonding

b)

covalent bonding

14.

This is an example of a(n) __________.

a)

Hydrogen Bonding

b)

Dipole

c)

Nonpolar Molecule

d)

Intermolecular Force

15.

What kind of force is the arrow pointing to?

a)

Intramolecular Force

b)

Intermolecular Force

16.

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

17.
London forces are stronger in heavier atoms or molecules, and weaker in lighter atoms or molecules.  Which of these has the strongest London forces?
a)
F2
b)
Br2
c)
I2
d)
Cl2
18.
Rank these in order of strength:
covalent bond
London forces
hydrogen bond
dipole-dipole attraction
a)
dipole-dipole>covalent bond>hydrogen bond>London
b)
London>dipole-diple>hydrogen bond>covalent bond
c)
covalent bond>hydrogen bond>dipole-dipole>London
d)
hydrogen bond>dipole-dipole>London>covalent bond
19.

Which of these molecules are polar? (You may choose multiple answers)

a)

a

b)

b

c)

c

d)

d

20.

What is the molecular geometry of BF3?

a)

bent

b)

trigonal planar

c)

tetrahedral

d)

trigonal pyramidal

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