Organic Chemistry A Short Course 13Th Ed By Hart - Test Bank
Chapter 3 -- Alkenes and Alkynes
MULTIPLE CHOICE
1. Which of the following dienes can be classified as conjugated?
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A) |
CH3CH=C=CH2 |
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B) |
CH3CH=CHCH=CH2 |
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C) |
CH2=CHCH2CH=CH2 |
|
D) |
CH3CH=CHCH2CH2CH=CH2 |
|
E) |
CH2=C=CH2 |
ANS: B TOP: Alkenes and Alkynes: Nomenclature and Structure
2. Which of the following molecular formulas could not represent an alkene?
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A) |
C5H10 |
|
B) |
C7H14 |
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C) |
C10H20 |
|
D) |
C27H56 |
|
E) |
C31H62 |
ANS: D TOP: Alkenes and Alkynes: Nomenclature and Structure
3. What is the correct name for the following molecule?
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A) |
1-ethylcyclohexene |
|
B) |
2-ethylcyclohexene |
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C) |
3-ethylcyclohexene |
|
D) |
cyclohexylethane |
|
E) |
1-ethyl-3-cyclohexene |
ANS: C TOP: Alkenes and Alkynes: Nomenclature and Structure
4. Which of the following compounds can exhibit cis/trans isomerism?
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A) |
1-heptene |
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B) |
2-heptene |
|
C) |
2-methyl-2-hexene |
|
D) |
3-methyl-1-hexene |
|
E) |
3-ethyl-2-pentene |
ANS: B TOP: Alkenes and Alkynes: Nomenclature and Structure
5. The correct IUPAC name for the following molecule is:
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A) |
trans-2,3-dichloro-5-methyl-2-hexene |
|
B) |
trans-2,3-dichloro-5-methyl-3-hexene |
|
C) |
cis-2,3-dichloro-5-methyl-3-hexene |
|
D) |
trans-4,5-dichloro-2-methyl-4-hexene |
|
E) |
cis-4,5-dichloro-2-methyl-4-hexene |
ANS: A TOP: Alkenes and Alkynes: Nomenclature and Structure
6. What is the correct structure for 2,3-dimethyl-2-pentene?
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A) |
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B) |
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C) |
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D) |
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E) |
ANS: D TOP: Alkenes and Alkynes: Nomenclature and Structure
7. The correct structure for allyl bromide is:
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A) |
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B) |
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C) |
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D) |
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E) |
ANS: A TOP: Alkenes and Alkynes: Nomenclature and Structure
8. Which of the following molecules is 4-methyl-2-hexyne?
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A) |
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B) |
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C) |
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D) |
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E) |
ANS: A TOP: Alkenes and Alkynes: Nomenclature and Structure
9. The correct name of the molecule below is:
|
A) |
5-methyl-7-octen-1-yne |
|
B) |
4-methyl-1-octen-7-yne |
|
C) |
4-methyl-1-octyn-7-ene |
|
D) |
5-methyl-1-octen-7-yne |
|
E) |
none of these is correct |
ANS: B TOP: Alkenes and Alkynes: Nomenclature and Structure
10. The multiple bonds in the following compounds are conjugated:
|
A) |
2, 3, and 5 |
|
B) |
4 and 6 |
|
C) |
only 1 |
|
D) |
2 and 3 |
|
E) |
2 and 5 |
ANS: A TOP: Alkenes and Alkynes: Nomenclature and Structure
11. The structure of (Z)-3-methyl-2-pentene is
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A) |
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B) |
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C) |
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D) |
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E) |
ANS: C TOP: Alkenes and Alkynes: Nomenclature and Structure
12. Which compound contains a carbon-carbon double bond with (Z) stereochemistry?
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A) |
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B) |
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C) |
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D) |
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E) |
ANS: D TOP: Alkenes and Alkynes: Nomenclature and Structure
13. The correct name for is:
|
A) |
2-methyl-4-isopropyl-3-hexene. |
|
B) |
3-ethyl-2,5-dimethyl-3-hexene. |
|
C) |
2,5-dimethyl-4-ethyl-3-hexene. |
|
D) |
1-ethyl-1,2-diisopropylethene. |
|
E) |
1,2-diisopropyl-1-butene. |
ANS: B TOP: Alkenes and Alkynes: Nomenclature and Structure
14. The double bond in ethene is made up of
|
A) |
a pi bond and a sigma bond formed by lateral overlap of two p orbitals. |
|
B) |
a sigma bond formed by overlap of two s orbitals and a pi bond formed by lateral overlap of two p orbitals. |
|
C) |
a pi bond formed by end-on overlap of two sp2 orbitals and a sigma bond formed by overlap of two s orbitals. |
|
D) |
a sigma bond formed by end-on overlap of two sp2 orbitals and a pi bond formed by lateral overlap of two p orbitals. |
|
E) |
a pi bond formed by lateral overlap of two sp2 orbitals and a sigma bond formed by end-on overlap of two sp2 orbitals. |
ANS: D TOP: Alkenes and Alkynes: Nomenclature and Structure
15. The triple bond in ethyne is made up of
|
A) |
two pi bonds and a sigma bond, each formed by a lateral overlap of two p orbitals. |
|
B) |
a sigma bond formed by overlap of two s orbitals and two pi bonds, each formed by lateral overlap of two p orbitals. |
|
C) |
a sigma bond formed by end-on overlap of two sp2 orbitals and a pi bond formed by lateral overlap of two p orbitals. |
|
D) |
two pi bonds, each formed by lateral overlap of two p orbitals, and a sigma bond formed by end-on overlap of two sp orbitals. |
|
E) |
two pi bonds, each formed by end-on overlap of two p orbitals, and a sigma bond formed by lateral overlap of two sp orbitals. |
ANS: D TOP: Alkenes and Alkynes: Nomenclature and Structure
16. Which of the following statements is false relative to alkenes?
A)
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