Chemistry: The Molecular Nature of Matter and Change, Fifth Edition (Silberberg)

Chapter 11: Theories of Covalent Bonding

Self-Assessment Quiz 1

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1
The lone pair of electrons on sulfur in SO2 is in
A)a p orbital.
B)an s orbital.
C)an sp2 hybrid orbital.
D)an sp3 hybrid orbital.
E)none of the above orbital types.
2
Which of the following molecules has sp3 hybridization and a dipole moment?
A)SiH4
B)BF3
C)NH3
D)BrF3
E)PCl5
3
Which of the following hybridization patterns is associated with trigonal bipyramidal geometry?
A)sp2
B)sp3
C)sp3d2
D)sp3d
E) sp
4
Which of the following hybridization patterns best describes the central atom in H2CF2?
A)sp2
B)sp3d
C)sp3
D)sp
E)sp3d2
5
How many <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/pi.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> bonds are present in a molecule of ethyne (acetylene), C2H2?
A)3
B)2
C)1
D)0
E)none of the above
6
Which of the following hybridization patterns best describes the carbon atom in NCO-?
A)sp2
B)sp3d
C)sp3
D)sp
E)sp3d2
7
A carbon-carbon double bond consists of
A)a <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/sigma.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> bond and two <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/pi.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> bonds.
B)a <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/pi.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> bond and two <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/sigma.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> bonds.
C)two <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/sigma.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> bonds.
D)two <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/pi.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> bonds.
E)a <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/sigma.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> bond and a <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/pi.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> bond.
8
What type orbital holds the lone pair of electrons on nitrogen in H2CNH?
A)2s
B)2px
C)sp
D)sp2
E)sp3
9
In a carbon-carbon triple bond, what is the nature of the bonding between the carbons?
A)two 2s orbitals overlapping
B)two 2p orbitals overlapping
C)two sp orbitals overlapping, two 2py overlapping and two 2pz overlapping
D)an sp and sp2 overlapping and 2p orbitals overlapping
E)an sp2 and sp2 overlapping and 2p orbitals overlapping
10
Which type of hybrid orbital on carbon is associated with bonds having restricted rotation?
A)sp
B)sp2
C)sp3
D)sp3d
E)sp3d2
11
When the nitrogen molecule, N2, loses an electron,
A)the ion formed will be less stable than N2.
B)the ion formed will be more stable than N2.
C)the stability of the ion formed will be the same as that of N2.
D)the bond length of ion will be shorter than the bond length of N2.
E)none of the above statements is correct.
12
According to the molecular orbital model, which is the least stable?
A)He2
B)Li2
C)B2
D)C2
E)NO
13
According to molecular orbital theory, what is the bond order in F2+?
A)1
B)1.5
C)2
D)2.5
E)3.0
14
According to the molecular orbital model, the highest occupied molecular orbital of O2 is
A)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/sigma.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>2s
B)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/pi.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>2p
C)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/sigma.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> *2s
D)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/pi.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> *2p
E)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0012041987/37547/sigma.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> *2p
15
Consider benzene (C6H6), carbonate ion (CO32-) and water (H2O). Of these three species, which one(s) has/have delocalized molecular orbitals?
A)only benzene
B)only carbonate
C)only water
D)benzene and water
E)benzene and carbonate
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