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Shape of molecules and IMF

Total questions: 25

Worksheet time: 1hrs 14mins

Name
Class
Date
1.

H2O

a)

V-shaped

b)

trigonal planar

c)

tetrahedral

d)

octahedral

2.

Cl2

a)

linear

b)

V-shaped

c)

octahedral

d)

trigonal planar

3.

PBr5

a)

trigonal bipyramidal

b)

trigonal planar

c)

tetrahedral

d)

octahedral

4.
molecules have three bonds like this have shape:
a)

linear

b)

trigonal planar

c)

trigonal pyramid

d)

bent of angular

5.
How many lone pairs( unshared pairs) are in this molecule's structure?
a)

6

b)

2

c)

0

d)

4

6.
Choose the correct shape for this molecule:
a)

Trigonal planar

b)

Trigonal pyramidal

c)

Bent

d)

Tetrahedral

7.
Choose the correct shape for this molecule:
a)

Bent

b)

Linear

c)

Tetrahedral

d)

Trigonal pyramidal

8.
What kind of chemical bond forms between a metal and a nonmetal?
a)

Covalent bond

b)

Ionic bond

c)

Can be either covalent or ionic

d)

Hydrogen bond

9.

What is the approximate bond angle in a water molecule?

a)

90o

b)

180o

c)

107o

d)

104.5o

10.

What is the approximate bond angle in nitrogen fluoride, NF3?

a)

90o

b)

120o

c)

107o

d)

60o

11.

Which of the following compounds consists of dipole molecules?

a)

H2S

b)

CH4

c)

CO2

d)

N2

12.

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

a)

Ne

b)

Kr

c)

Xe

d)

Rn

13.

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

14.

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.

15.

In which molecule is hydrogen bonding the strongest?

a)

HF

b)

HCl

c)

HBr

d)

HI

16.

The correct ranking of intermolecular forces in order of greatest to least

a)

dipole-dipole, Hydrogen bonding, van der Waal forces

b)

van der Waal forces, hydrogen bonding, dipole-dipole attraction

c)

Hydrogen bonding, dipole-dipole attraction, van der Waals forces

d)

van der waal forces, dipole-dipole attractions, Hydrogen bonding

17.

Molecule-ion attraction are found in

a)

Cu (s)

b)

CO2 (g)

c)

KBr (l)

d)

NaCl (aq)

18.

These intermolecular forces permit Helium and Hydrogen to exist in liquid or solid phases under conditions of low temperature and high pressure

a)

molecule-ion attraction

b)

dipole-dipole attraction

c)

van der Waal forces

d)

Hydrogen bonds

19.
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.

20.
Does HCl have hydrogen bonding?
a)

yes

b)

no

21.
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

22.

Intermolecular forces for: NH3

a)

Dispersion Force

b)

Dipole dipole

c)

Hydrogen bonding

23.

Which substance would have the weakest intermolecular forces of attraction?

a)

CH4

b)

NaCl

c)

H2O

d)

MgF2

24.
Intermolecular force present in HCl?
a)

dipole dipole

b)

dispersion

c)

Hydrogen bonding

d)

ionic

25.
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

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