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Chapter 1
91
Copyright © 2017 Pearson Education, Inc.
Chapter 1 Practice Test
1.
Answer the following:
a.
Which bond has a greater dipole moment, a carbon-oxygen bond or a carbon-fluorine bond?
b.
If
He
2
+
has three electrons in its molecular orbitals, how many electrons are in an antibonding molecu-
lar orbital?
c.
Which is the longer bond, a carbon–hydrogen bond in ethene or a carbon–hydrogen bond in ethane?
d.
Which is larger, the bond angle in water or the bond angle in ammonia?
2.
What is the hybridization of the carbon atom in each of the following compounds?
+
CH
3
-
CH
3
#
CH
3
3.
Draw the Lewis structure for
HCO
3
-
.
4.
Circle the compounds below that have a dipole
moment
=
0.
CH
2
Cl
2
CH
3
CH
3
CH
3
Cl H
2
C
“
O CCl
4
5.
Which compound has greater bond angles,
H
3
O
+
or
+
NH
4
?
6.
Draw the structure for each of the following:
a.
a methyl cation
b.
a hydride ion
c.
a bromine radical
d.
an alkane with only primary carbons
7.
Draw the structure of a compound that contains only carbon and hydrogen, and that has five carbons, two
of which are
sp
2
hybridized and three of which are
sp
3
hybridized.
8.
What is the hybridization of each of the indicated atoms?
CH
3
CH
2
C
O
N
O C O
CH
3
C
CH
3
CCH
3
NCH
3
CH
3
9.
a.
What orbitals do carbon’s electrons occupy before promotion?
b.
What orbitals do carbon’s electrons occupy after promotion and before hybridization?
c.
What orbitals do carbon’s electrons occupy after hybridization?