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Chemistry, 7/e
Raymond Chang, Williams College
Chemical Bonding II: Molecular Geometry and Hybridization of Atomic Orbitals
Self Assessment A
1
The bond angles in the H
3
O
+
ion are:
A)
120
o
B)
90
o
, 120
o
C)
109
o
D)
90
o
E)
180
o
2
Which of the following molecules is not planar?
A)
BCl
3
B)
ClF
3
C)
PCl
3
D)
XeF
4
E)
All the compounds above are planar.
3
Which of the following has the smallest bond angles?
A)
CO
2
B)
SO
2
C)
SO
3
D)
SO
4
2-
E)
The bond angles in each of these substances are the same.
4
Which of the following molecules has a dipole moment?
A)
H
2
B)
CO
2
C)
F
2
D)
SO
2
E)
BF
3
5
Determine the hybridization of the central atom in the compound PCl
5
.
A)
sp
3
d
B)
sp
3
C)
sp
3
d
2
D)
sp
E)
sp
2
6
Which of the following molecules has a dipole moment and a central atom with sp
3
hybridization?
A)
CCl
4
B)
BF
3
C)
CHCl
3
D)
BrF
3
E)
C
2
H
4
7
The lone pair of electrons on the sulfur atom in SO
2
is in
A)
a p orbital.
B)
an s orbital.
C)
an sp
3
hybrid orbital.
D)
an sp
2
hybrid orbital.
E)
None of the above.
8
What is the bond order for the species O
2
-
?
A)
1
B)
1.5
C)
2
D)
2.5
E)
None of the above.
9
According to the molecular orbital model, which of the species below is the least stable?
A)
Li
2
B)
B
2
C)
C
2
D)
O
2
E)
He
2
10
Which of the following molecules has delocalized molecular orbitals?
A)
H
2
O
B)
C
6
H
6
C)
C
2
H
2
D)
CH
3
OH
E)
None of the above have delocalized molecular orbitals.
2002 McGraw-Hill Higher Education
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