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AP Chem Intermolecular Forces

Total questions: 15

Worksheet time: 12mins

Name
Class
Date
1.
Hydrocarbons will have which type of intermolecular forces?
a)
Dispersion
b)
dipole
c)
hydrogen bonds
2.
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.
3.
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
4.
Which is the second strongest intermolecular force, after hydrogen bonding?
a)
dipole-dipole attraction
b)
London forces
5.
All molecules have London forces between them, but dipole-dipole and hydrogen bonding are so much stronger that when they are present we can ignore London forces.  Which of these has ONLY London forces?
a)
I2
b)
NH3
c)
OCl2
d)
SH2
6.

Which substance would have the weakest intermolecular forces of attraction?

a)

CH4

b)

NaCl

c)

H2O

d)

MgF2

7.
Which is the strongest intermolecular force below"
a)
Ionic
b)
Dispersion
c)
Hydrogen
d)
Metallic
8.

Which element is expected to demonstrate the strongest dispersion forces and have the highest boiling point?

a)

Ne

b)

Kr

c)

Xe

d)

Rn

9.

A compound has the molecular formula C30H62. The compound is known to have nonpolar molecules and exists as a solid at room temperature. Which is the biggest factor responsible for the properties of this compound?

a)

ion-molecule attractions

b)

London dispersion forces

c)

dipole-dipole attractions

d)

hydrogen bonding

10.

Which statement explains why Br2 is a liquid at STP and I2 is a solid at STP?

a)

Molecules of Br2 are polar, and molecules of I2 are nonpolar

b)

Molecules of Br2 are nonpolar, and molecules of I2 are polar

c)

Molecules of Br2 have stronger intermolecular forces than molecules of I2.

d)

Molecules of I2 have stronger intermolecular forces than molecules of Br2.

11.
Intermolecular forces are the forces
a)
within molecules
b)
between molecules
12.
Which of the following has the highest boiling point?
a)
H2
b)
NH3
c)
N2
d)
O2
13.

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

a)

higher

b)

lower

14.

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

15.
Propane is a gas at STP, while bromine is a liquid at STP. Which statement correctly explains these observations?
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

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