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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 H3O+ ion are:
A)120o
B)90o, 120o
C)109o
D)90o
E)180o
2

Which of the following molecules is not planar?
A)BCl3
B)ClF3
C)PCl3
D)XeF4
E)All the compounds above are planar.
3

Which of the following has the smallest bond angles?
A)CO2
B)SO2
C)SO3
D)SO42-
E)The bond angles in each of these substances are the same.
4

Which of the following molecules has a dipole moment?
A)H2
B)CO2
C)F2
D)SO2
E)BF3
5

Determine the hybridization of the central atom in the compound PCl5.
A)sp3d
B)sp3
C)sp3d2
D)sp
E)sp2
6

Which of the following molecules has a dipole moment and a central atom with sp3 hybridization?
A)CCl4
B)BF3
C)CHCl3
D)BrF3
E)C2H4
7

The lone pair of electrons on the sulfur atom in SO2 is in
A)a p orbital.
B)an s orbital.
C)an sp3 hybrid orbital.
D)an sp2 hybrid orbital.
E)None of the above.
8

What is the bond order for the species O2-?
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)Li2
B)B2
C)C2
D)O2
E)He2
10

Which of the following molecules has delocalized molecular orbitals?
A)H2O
B)C6H6
C)C2H2
D)CH3OH
E)None of the above have delocalized molecular orbitals.