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Unit 3 Part 1 Notes 1 Assessment: IMF

Total questions: 20

Worksheet time: 17mins

Name
Class
Date
1.
Which of the following factors plays an important role in the identification of specific intermolecular forces in a molecule?
a)
bond type
b)
density
c)
solubility
d)
molecular polarity
2.

Which of the following molecules contains ONLY London dispersion forces (LDF)?

a)
CF4
b)
HCl
c)
H2O
d)

MgO

3.
Which of the following molecules predominantly consists of dipole-dipole forces?
a)
HF
b)
Ne
c)
O2
d)

PCl3

4.

Which of the following molecules would have the lowest boiling point? (Think about the predominant IMF for each molecule).

a)
CH4
b)

HCl

c)

H2O

d)

NH3

5.
Which of the following molecules has hydrogen bonding?
a)
HCl
b)
HI
c)
HF
d)
HBr
6.
Which of the following statements correctly explains why hydrogen bonding is such a strong intermolecular force?
a)
There is an attraction between a small, weakly electronegative hydrogen atom and a large, strongly electronegative atom of fluorine, nitrogen, or oxygen
b)
There is an attraction between a small, highly electronegative hydrogen atom and a large, highly electronegative fluorine atom
c)
There is an attraction between the hydrogen and oxygen atoms, only
d)
There is an attraction between the hydrogen and nitrogen atoms, only
7.
Hydrogen bonds are a form of bonding.
a)
True 
b)
False
8.

Type of intermolecular force present in I2, Br2, and Cl2 is:

a)

dipole-dipole

b)
H-bond
c)

London dispersion force (LDF)

d)
metallic
9.
H2S has what kind of intermolecular force?
a)
dipole dipole
b)
dispersion
c)
H-bond
d)
ionic
10.
Intermolecular forces are the forces
a)
within molecules
b)
between molecules
11.

Which of the following has the highest boiling point? (think about the strengths of IMFs and the IMF each molecule has)

a)
H2
b)
NH3
c)
N2
d)
O2
12.
Intermolecular force present in HCl?
a)

dipole-dipole

b)

London dispersion force

c)
H-bond
d)
ionic
13.

What explains the very high 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.
14.
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
15.
Which is the second strongest intermolecular force, after hydrogen bonding?
a)
dipole-dipole attraction
b)
London forces
16.

Intermolecular forces for: CO2

a)

London Dispersion Force

b)

Dipole dipole

c)

Hydrogen bonding

17.

The weaker the intermolecular forces of a substance, the _____________ the boiling point.

a)

higher

b)

lower

18.

Which of the following intermolecular force does all types of matter have?

a)

London dispersion forces

b)

dipole-dipole forces

c)

hydrogen bonding

d)

none of the above

19.

What are physical properties that intermolecular forces influence in a molecule?

a)

boiling point

b)

melting point

c)

capillary action

d)

density

20.

There's a saying in chemistry: 'like dissolves like," which mean polar dissolves polar and nonpolar dissolves nonpolar. If you need to clean an oily stain, which solvent would be best to choose? (think about polarity of oil...it's the opposite of water's).

a)

H2O

b)

C6H14

c)

CH3OH

d)

HCl