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CHEM 121 W09 Test 1
Name: __________________________ Date: _____________
1. Which of the following could not be the molecular formula for an alkane molecule?
A) C4H10
B) C5H14
C) CH4
D) C18H38
2. The representation
A) a molecular formula
B) a condensed structural formula
C) an expanded structural formula
D) a skeletal structural formula
for the alkane pentane is an example of
3. Which of the following alkanes has the IUPAC name 2-methylbutane?
A)
B)
C)
D)
4. How many carbon atoms are present in the alkane whose IUPAC name is
2,3,3-trimethylpentane?
A) five
B) seven
C) eight
D) nine
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5. When the molecular formulas for cyclic and noncyclic alkanes with the same number of
carbon atoms are compared, it is always found that the cycloalkane has
A) two more hydrogen atoms.
B) the same number of hydrogen atoms.
C) two less hydrogen atoms.
D) four less hydrogen atoms.
6. The most important chemical use for alkanes relates to their chemical reaction with
A) hydrogen.
B) oxygen.
C) chlorine.
D) bromine.
7. Which of the following is a correct structural formula for an alkane?
A)
B)
C)
D) more than one correct response
E) no correct response
8. In which of the following alkanes are 13 covalent bonds present?
A)
B)
C)
D) more than one correct response
E) no correct response
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9. Which of the following alkane structures contain both secondary and tertiary carbon
atoms?
A)
B)
C)
D) more than one correct response
E) no correct response
10. For which of the following halogenated cycloalkanes is cis-trans isomerism possible?
A) 1,1-dichlorocyclobutane
B) 1-bromo-1-chlorocyclobutane
C) 1-bromo-2-chlorocyclobutane
D) more than one correct response
E) no correct response
11. The correct IUPAC name for
CH3
CH CH
CH
CH3
CH3
is
A)
B)
C)
D)
12.
2-methylpentene.
2-methyl-3,4-pentene.
2-methyl-3-pentene.
4-methyl-2-pentene.
The correct IUPAC name for
A) 1-methyl-2-cyclopropene
B) 2-methyl-1-cyclopropene
C) 3-methylcyclopropene
D) 1-methylcyclopropene
is
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13. Cis-trans isomerism is possible for which of the following alkenes?
A) CH2=CH–CH2–CH2–CH3
B) CH3–CH=CH–CH2–CH3
C) CH3–CH=CH2
D) CH2=CH–CH2–CH3
14. Markovnikov's rule is needed to predict the product in the reaction between HCl and
A) CH2=CH2.
B) CH3–CH=CH–CH3.
C) CH2=CH–CH3.
D) CH3–CH3.
15. The IUPAC name for the hydrocarbon
CH3 CH2 CH2 CH CH2 CH3
A)
B)
C)
D)
3-benzylhexane.
4-benzylhexane.
3-phenylhexane.
4-phenylhexane.
16. Which of the following is a correct IUPAC name for a substituted cycloalkene?
A) 1-methyl-2-cyclopentene
B) 2-methyl-1-cyclopentene
C) 2-methylcyclopentene
D) more than one correct response
E) no correct response
17. Markovnikov's rule is needed to predict the organic product in which of the following
reactions?
A) 2-butene + HCl
B) 1-butene + H2 (Ni catalyst)
C) cyclobutene + H2O (H2SO4 catalyst)
D) more than one correct response
E) no correct response
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18. Which of the following is an incorrect IUPAC name for a disubstituted benzene?
A) 2,3-dichlorobenzene
B) 1-bromo-4-chlorobenzene
C) 1-bromo-3-methylbenzene
D) more than one correct response
E) no correct response
19. Which of the following reactions involving benzene require the presence of an AlCl3
catalyst?
A) alkylation
B) bromination
C) chlorination
D) more than one correct response
E) no correct response
20. A general method for preparing alcohols is the
A) hydration of alkenes.
B) combustion of alkanes.
C) combustion of ethers.
D) hydrogenation of alkenes.
21. Which of the following is a secondary alcohol?
A)
B)
C)
D)
22. Intramolecular dehydration of an alcohol produces a(n)
A) alkane.
B) alkene.
C) ether.
D) thiol.
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23. All of the following general formulas except one represent an ether. The exception is
A) R-O-R
B) Ar-O-R
C) H-O-Ar
D) Ar-O-Ar
24. The solubility of alcohols in water
A) decreases as the carbon chain length increases.
B) decreases as the number of –OH groups present increases.
C) increases with increasing molecular mass.
D) more than one correct response
E) no correct response
25. In a secondary alcohol, the hydroxyl-bearing carbon atom
A) is always involved in a double bond.
B) is attached to two other carbon atoms.
C) cannot be bonded to hydrogen atoms.
D) more than one correct response
E) no correct response
26. In which of the following pairs of names do both names represent the same ether?
A) diethyl ether and 1,2-diethoxyethane
B) methyl isopropyl ether and 1-methoxypropane
C) ethyl isopropyl ether and 2-ethoxypropane
D) more than one correct response
E) no correct response
27. Which of the following compounds is not a constitutional isomer of 1-butanol?
A) diethyl ether
B) 2-methyl-2-propanol
C) 2-methoxypropane
D) more than one correct response
E) no correct response
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Answer Key
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27.
B
B
A
C
C
B
E
D
B
C
D
C
B
C
C
C
E
D
A
A
C
B
C
A
B
C
E
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