More Chemistry Questions
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1.
|
Which
has the greater N–O bond length, NO2– or NO3–?
|
|
A)
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NO2–
|
|
B)
|
NO3–
|
|
C)
|
The
bond lengths are the same.
|
|
D)
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More
information is needed.
|
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E)
|
None
of these (A-D).
|
|
2.
|
Nitrous
oxide (N2O, skeleton N-N-O) has three resonance structures. Based
on an analysis of these three structures, including formal charges, the most
likely N-N bond length is
|
|||||||||
A)
|
0.110
nm
|
|||||||||
B)
|
0.112
nm
|
|||||||||
C)
|
0.120
nm
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|||||||||
D)
|
0.136
nm
|
|||||||||
E)
|
0.167
nm
|
|||||||||
3.
|
The
energy sequence of the molecular orbitals in OF is s2ss2s*s2pp2pp2p*s2p* . The cation OF1+
is predicted by simple molecular orbital theory to be __________ and _____________.
|
|
A)
|
unstable,
diamagnetic
|
|
B)
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unstable,
paramagnetic
|
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C)
|
stable,
diamagnetic
|
|
D)
|
stable,
paramagnetic
|
|
4.
|
The
head-on, out of phase, overlap
of atomic p-orbitals in this fashion:
 yields the molecular orbital |
|
A)
|
s
|
|
B)
|
s*
|
|
C)
|
p
|
|
D)
|
p*
|
|
5.
|
Consider
a hypothetical molecule with the skeleton structure N-O-N. In the most reasonable of the
possible Lewis structures, the molecule has ______, and is likely to be
______.
|
|
A)
|
two
double bonds, stable
|
|
B)
|
two
double bonds, unstable
|
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C)
|
a
single bond and a triple bond, stable
|
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D)
|
a
single bond and a triple bond, unstable
|
|
6.
|
Which
of the molecules below would you expect to have the highest boiling point?
   
I
II
III
IV
---------------------------------------------------------------------------------
|
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A)
|
I
|
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B)
|
II
|
|
C)
|
III
|
|
D)
|
IV
|
|
E)
|
II
and IV
|
|
Use
the following to answer questions 7-9:
Consider
the molecule and the following hybridization choices:
H2N-N=CH-C≡CH
atom # 1
2
3
7.
|
What
is the hybridization of the nitrogen atom that is single-bonded to nitrogen
and two hydrogen atoms (#1)?
|
|
A)
|
sp
|
|
B)
|
sp2
|
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C)
|
sp3
|
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D)
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dsp3
|
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E)
|
d2sp3
|
|
8.
|
What
is the hybridization of the carbon atom that is single bonded to hydrogen and
triple bonded to carbon (#3)?
|
|
A)
|
sp
|
|
B)
|
sp2
|
|
C)
|
sp3
|
|
D)
|
dsp3
|
|
E)
|
d2sp3
|
|
9.
|
What
is the hybridization of the carbon atom that is double bonded to nitrogen
(#2)?
|
|
A)
|
sp
|
|
B)
|
sp2
|
|
C)
|
sp3
|
|
D)
|
dsp3
|
|
E)
|
d2sp3
|
|
10.
|
The
energy sequence of the molecular orbitals in C2 is s2ss2s*p2ps2pp2p*s2p* . The bond order for the C2-1
anion is
|
|
A)
|
0
|
|
B)
|
1
|
|
C)
|
1.5
|
|
D)
|
2
|
|
E)
|
2.5
|
|
Use
the following to answer questions 11-12:
Draw
the Lewis structures of the molecules below and use them to answer the
following questions:
I.
|
BH3
|
II.
|
NO2-1
|
III.
|
SF6
|
IV.
|
SO3
|
V.
|
PCl5
|
11.
|
Which
of these molecules show resonance?
|
|
A)
|
I,
II
|
|
B)
|
II,
IV
|
|
C)
|
II,
V
|
|
D)
|
III,
IV
|
|
E)
|
III,
V
|
|
12.
|
How
many of the molecules have no dipole moment?
|
|
A)
|
1
|
|
B)
|
2
|
|
C)
|
3
|
|
D)
|
4
|
|
E)
|
They
are all polar.
|
|
13.
|
In
the molecular ion OF-1, the lone pair electrons on the fluorine
are in
|
|
A)
|
p
orbitals
|
|
B)
|
sp
orbitals
|
|
C)
|
sp2
orbitals
|
|
D)
|
sp3
orbitals
|
|
14.
|
Which
of the following ionic compounds has the smallest lattice energy (i.e., the
lattice energy least favorable to a stable lattice)?
|
|
A)
|
LiF
|
|
B)
|
CsI
|
|
C)
|
NaCl
|
|
D)
|
BaO
|
|
E)
|
MgO
|
|
15.
|
The
molecule H-N=N-H is __________ and the molecular cation H2N=O+
is _________.
|
|
A)
|
linear, planar
|
|
B)
|
planar,
nonplanar
|
|
C)
|
nonplanar,
planar
|
|
D)
|
planar,
planar
|
|
E)
|
linear,
nonplanar
|
|
16.
|
The
in-phase sideways overlap of atomic p-orbitals leads to this molecular
orbital:
|
|
A)
|
s
|
|
B)
|
s*
|
|
C)
|
p
|
|
D)
|
p*
|
|
17.
|
Consider
the molecule ClF5.
The electronic geometry is __________ and the molecular geometry is
__________.
|
|
A)
|
pentagonal,
octahedral
|
|
B)
|
trigonal
bipyramidal, trigonal bipyramidal
|
|
C)
|
octahedral,
tetrahedral
|
|
D)
|
tetrahedral,
trigonal pyramidal
|
|
E)
|
octahedral, square pyramidal
|
|
18.
|
Which
of the following has the smallest radius?
|
|
A)
|
F–
|
|
B)
|
Ne
|
|
C)
|
O2–
|
|
D)
|
Mg2+
|
|
E)
|
Na+
|
|
Do you live in NYC?
Is your home starting to look a bit messy and dirty?
Have it professionally cleaned by my company!
Check us out or refer us to someone you may know that may need our services.
nationalpremiercleaning.com
If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com