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What are two types of constitutional
(or structural) isomers?
1. positional and
geometrical
2. functional group and
geometrical
3. functional group and
positional
4. geometrical and optical
5. positional and optical
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Which of the following compounds does not
have a constitutional isomer with a different
functional group?
1.
2.
3.
4.
5.
propanone (acetone)
3-pentanone
ethanol
dimethyl ether
ethanal
(acetaldehyde)
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Which of the following is a
chiral molecule?
1.
2.
3.
4.
5.
CH3CBr2Cl
CBrCl2I
CH3CBrClI
(CH3)2CHCl
CH2BrI
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Cyclohexane can assume two different geometries,
but to do this the ring becomes nonplanar. What are
these two arrangements of cyclohexane called?
1. cis and trans
2. vic and gem
3. strained and
unstrained
4. twist boat and chair
5. meta and para
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The pKbfor the formate ion (HCOO-) is
10.26. What is Ka for formic acid (HCOOH) ?
1.
2.
3.
4.
5.
1.8 x 10-5
3.6 x 10-4
1.8 x 10-4
1.8 x 10-3
5.6 x 10-4
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When primary alcohols are oxidized to aldehydes, the reaction mixture is
heated to a temperature slightly above the boiling point of the aldehyde so
that the aldehyde distills out as soon as it is formed. Why must aldehydes
be removed from the reaction mixture as soon as they are formed?
1.
2.
The aldehydes might polymerize.
The aldehydes might be reduced
back to the alcohol.
The aldehydes might oxidize to
CO2 and H2O.
Aldehydes are easily oxidized to
carboxylic acids.
Aldehydes readily react with
unreacted alcohol.
3.
4.
5.
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The reaction of 1-propanol with K2Cr2O7 in
acidic solution produces __________.
1.
2.
3.
4.
5.
propyne
propene
propanal
propanone
cyclopropanone
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Which one of the following cannot be easily
oxidized to a carboxylic acid by an acidic
solution of K2Cr2O7?
1.
2.
3.
4.
5.
methanol
ethanol
acetaldehyde
2-butanol
propanal
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Which of the following is not an advantage for the
preparation of esters by the reaction of an acyl halide and
alcohol versus the preparation by the reaction of an organic
acid and alcohol?
1.
Reactions between acids and alcohols
are slow and require prolonged boiling.
Reactions between acyl halides and
alcohols are rapid and require no
catalyst.
Reactions between acids and alcohols
require a strong inorganic acid catalyst.
Reactions between acids and alcohols
establish an equilibrium with both
reactants and products present.
Acyl halides are much cheaper than
organic acids because they are readily
2.
3.
4.
5.
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A reaction in which a small molecule, such as H2O
or HCl, is eliminated and two larger molecules are
bonded together is called a(n) __________ reaction.
1.
2.
3.
4.
5.
elimination
condensation
addition
hydration
oxidation
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Which of the following is not a
component of nucleic acids?
1.
2.
3.
4.
5.
phosphate group
carbohydrate unit
amino acids
selected organic acid
none of these
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