Chemistry (Chang), 10th Edition

Chapter 10: Chemical Bonding II- Molecular Geometry and Hybridization of Atomic Orbitals

Self Assessment B

1
Which of the compounds listed below is not linear?
A)SO2
B)CO2
C)I3-
D)N3-
2
Which of the species below has two nonbonded electron pairs on the central atom?
A)BCl3
B)PCl3
C)XeF4
D)SF4
E)SF6
3
Which of the following species is not planar?
A)SF4
B)H2C=CH2
C)BCl3
D)XeF4
4
Which is true for carbon monoxide?
A)CO has a short CO bond.
B)CO has a zero dipole moment.
C)The bond energy in CO is low.
D)The atoms in CO cannot obey the octet rule.
E)All of the above are true about CO.
5
Which of the following molecules has no dipole moment and a central atom with sp3d hybridization?
A)PCl3
B)BF3
C)SF4
D)BrF5
E)PCl5
6
If the geometry around the central atom of an ion or compound is octahedral, what must be the hybridization of the central atom?
A)sp
B)dsp2
C)dsp3
D)sp3d2
E)The central atom would not have hybridized orbitals.
7
The C2H2 molecule contains _____ pi bonds and the C atoms are ______ hybridized.
A)2, sp2
B)2, sp
C)1, sp
D)1, sp
E)3, sp
8
What is the bond order for the species O2+?
A)1
B)1.5
C)2
D)2.5
9
Assume that an N2 molecule absorbs a photon and goes to its first excited state.
A)The excited N2 is less stable than N2 in the ground state.
B)The excited N2 is more stable than N2 in the ground state.
C)The bond length of N2 in the excited state is shorter than the bond length of N2 in the ground state.
D)B and C are both true.
10
Which of the following has delocalized molecular orbitals?
A)NO3-
B)CO32-
C)NH4+
D)HO-
E)A and B.
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