Deck 11: The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Question 1

What is the IUPAC name of the compound shown below?

A)heptyne
B)butyl methyl ethene
C)1-methyl-2-butyl ethyne
D)2-hexene
E)2-heptyne

Answer 1

2-heptyne

Question 2

What is the product of the reaction shown below?

A)
B)
C)
D)
E)

Answer 2

Question 3

In the food industry, what substance undergoes hydrogenation to produce margarine?

A)vegetable oils
B)cholesterol
C)wheat
D)eggs
E)lard

Answer 3

vegetable oils

Question 4

What is the IUPAC name of HC≡CH?

A)acetyne
B)butyne
C)ethyne
D)diyne
E)triyne

Question 5

What is the molecular formula of the structure shown below?

A)C₆
B)C₆H₆
C)C₆H₁₀
D)C₆H₁₂
E)C₆H₁₄

Question 6

What is true about a compound with the name 3,3-dimethyl-1-butyne?

A)It is aromatic.
B)It contains a carbonyl group.
C)It contains a carbon-carbon double bond.
D)It contains a carbon-carbon triple bond.
E)It contains a benzene ring.

Question 7

What is the IUPAC name of the following compound?

A)1,1,2-trimethylethene
B)2-methylbuta-2-ene
C)1,2-dimethylpropene
D)2-methyl-2-butene
E)2,3-dimethylbutene

Question 8

An organic compound is classified as aromatic if it fits which of the following criteria?

A)It is fragrant.
B)It is cyclic.
C)It contains at least one C=C bond.
D)It contains a benzene ring.
E)It follows Markovnikov's rule.

Question 9

Polyvinyl chloride (PVC) is formed by addition polymerization of vinyl chloride, CH₂=CHCl.Which of the following depicts a representative section of the PVC structure?

A)
B)
C)
D)
E)

Question 10

Which statement concerning the structure of the compound 1-ethylcyclohexene is FALSE?

A)It contains a ring of six carbons.
B)It contains one C=C.
C)It contains a two-carbon alkyl substituent on the parent chain.
D)It is an alkene.
E)ll of these are correct.

Question 11

Which of the following compounds exists as cis-trans isomers?

A)1-pentene
B)butane
C)2-methyl-1-butene
D)3-hexene
E)2,3-dimethyl-2-butene

Question 12

What is the proper IUPAC name for an alkene that contains three carbon atoms?

A)1-methylethene
B)2-methylethene
C)propene
D)propane
E)1-propyne

Question 13

Provide the IUPAC name of the following compound:

A)cis-1,2-dibromopropane
B)trans-1,2-dibromo-1-methylethene
C)cis-1,2-dibromo-2-methylethene
D)cis-1,2-dibromopropene
E)trans-1,2-dibromopropene

Question 14

Which term correctly describes the substitution pattern on the benzene ring in Fenfluramine, one component of the appetite suppressant Fen-Phen?

A)trans
B)syn
C)meta
D)cis
E)ortho

Question 15

Which of the following is the correct condensed formula for 2-butyne?

A)CH≡CCH₂CH₃
B)CH₃C≡CCH₃
C)CH₃CH=CHCH₃
D)CH₃CH₂≡CH₂CH₃
E)None of the choices are correct.

Question 16

What is the geometry and bond angle around a carbon atom that has one triple bond and one single bond to its neighboring atoms?

A)linear, 180^o
B)bent, 120^o
C)trigonal planar, 120^o
D)trigonal, 180^o
E)tetrahedral, 109.5^o

Question 17

Sunscreens absorb UV radiation and protect the skin from its harmful effects.Commercially available sunscreens contain a benzene ring in the structure of the active ingredient.Which of the following compounds might be effective as an active ingredient in a commercial sunscreen?

A)
B)
C)
D)
E)All of the compounds would be effective.

Question 18

What is the name of the major product in the reaction shown below?

A)2-methyl-2-pentene
B)2-chloro-2-methyl-2-pentene
C)3-chloro-2-methylpentane
D)2-methylpentane
E)2-chloro-2-methylpentane

Question 19

What catalysts are often used in the hydrogenation of alkenes?

A)platinum, palladium, and nickel
B)copper, chromium, and zinc
C)acid, base, and nickel
D)gold, silver, and aluminum
E)platinum, gold, and silver

Question 20

What is the IUPAC name of the following compound?

A)cis-2-butene
B)trans-2-butene
C)cis-1,2-dimethylethene
D)trans-1,2-dimethylethene
E)cis-1,2-dimethylbutene

Question 21

What is the IUPAC name of the following compound?

A)4-methyl-2-heptyne
B)4-methyl-5-heptyne
C)4-ethyl-4-methylbutane
D)4-propyl-2-pentyne
E)2-propyl-3-butyne

Question 22

What is the structure and name of the major product of the following reaction? CH₃CH=CH₂ + HCl → ?

A)CH₃CH₂CH₂Cl, 3-chloropropane
B)CH₃CH₂CH₂Cl, 1-chloropropane
C)CH₂CHClCH₃, 2-chloropropane
D)CH₃CH=CHCl, 1-chloro-1-propene
E)There is no major product.

Question 23

Bombykol is a pheromone secreted by the female silkworm moth to attract males.This compound contains two alkene double bonds.Which of the following correctly describes the geometry around each?

A)The double bond at C10 is cis and the double bond at C12 is trans.
B)The double bonds at C10 and C12 are both cis.
C)The double bonds at C10 and C12 are both trans.
D)The double bond at C10 is trans and the double bond at C12 is cis.
E)It is impossible to tell from the line formula alone.

Question 24

What is the IUPAC name of the following compound?

A)propene
B)1-methylethyne
C)propyne
D)acetylene
E)2-methylethyne

Question 25

What is the structure of the product of the following reaction?

A)CH₃CH₂O
B)CH₃CH₃
C)CH₃CH₂OH
D)HOCH₂CH₂OH
E)None of the choices are correct.

Question 26

What is the common name of the compound shown?

A)methylbenzene
B)toluene
C)methyltoluene
D)methylcyclohexene
E)None of the choices are correct.

Question 27

How many moles of hydrogen gas (H₂) are needed to convert one mole of ethyne to ethane?

A)0.5
B)1
C)2
D)3
E)8

Question 28

When 4,4-dimethyl-2-pentene adds H₂ in an addition reaction, what is the name of the product that results?

A)pentane
B)2,2-dimethylpentane
C)4,4-dimethylpentane
D)4,4-dimethyl-2-pentane
E)2,3-dihydro-4,4-dimethylpentane

Question 29

Which of the following reactions would provide the highest yield of 3-bromohexane?

A)
B)
C)
D)
E)All would provide equal yields of 3-bromohexane.

Question 30

How many moles of hydrogen gas (H₂) are needed to convert one mole of ethene to ethane?

A)1
B)2
C)3
D)4
E)8

Question 31

Which reaction type is most characteristic of alkenes?

A)substitution
B)addition
C)elimination
D)combination
E)decomposition

Question 32

Which of the following is the correct molecular formula for cyclopentene?

A)C₄H₈
B)C₅H₈
C)C₅H₁₂
D)C₅H₁₀
E)C₅H₆

Question 33

Which reaction may be used to convert an alkene to an alkane?

A)hydrohalogenation
B)substitution
C)hydrogenation
D)hydration
E)hydrocarbonation

Question 34

The compound ortho-dichlorobenzene has substituents on which carbon atoms of the benzene ring?

A)C1 and C2
B)C1 and C3
C)C1 and C4
D)C1 and C 5
E)C1 only

Question 35

What is the molecular formula of the simplest alkyne?

A)C₂H₄
B)CH₄
C)C₄H₈
D)C₂H₂
E)C₄H₆

Question 36

Which of the following types of compounds is produced by the hydration of an alkene?

A)alkyne
B)phenol
C)alcohol
D)aldehyde
E)ketone

Question 37

Acetylene (ethyne) is a gas at room temperature because its boiling point is -84°C. What type of intermolecular forces hold molecules of acetylene together in a collection?

A)London dispersion forces
B)hydrogen bonding
C)ionic bonding
D)dipole-dipole forces
E)covalent bonds

Question 38

Which of the following terms best describes the geometry around a carbon atom with the bonding pattern shown?

A)tetrahedral
B)straight
C)saturated
D)trigonal planar
E)cyclic

Question 39

What is the IUPAC name of the following compound?

A)1,2-dimethylbutene
B)cis-2-butene
C)trans-2-butene
D)1,2-dimethylethene
E)cis-1,2-dimethylbutene

Question 40

What is the structure and name of the product of the following reaction?

A)CH₃CH₂CHCH₃, butane
B)CH₃CH₂CH₂CH₃, butane
C)CH₃CH₂C≡CH, butyne
D)CH₃CH₂CH₂CH₃, propane
E)None of the choices are correct.

Question 41

Alkenes contain only double bonds.

Question 42

What is the correct IUPAC name for the compound shown below?

A)2-methyl-1-butene
B)2-ethylpropene
C)cis-2-methyl-1-butene
D)trans-2-ethyl-2-methylbutene
E)trans-2-ethyl-2-methylethene

Question 43

What is the name of the organic product in the reaction of benzene and chlorine (with FeCl₃ as a catalyst)?

A)2-chlrorobenzene
B)meta-dichlorobenzene
C)1,2-dichlorobenzene
D)1-chlorobenzene
E)chlorobenzene

Question 44

What is the major product formed by the hydration of propene?

A)
B)
C)
D)
E)

Question 45

Both 1-butene and 2-butene have cis- and trans-isomers.

Question 46

What is the IUPAC name of the compound below?

A)trans-1-bromo-1-methyl-2-pentene
B)2-bromohexene
C)trans-2-bromo-3-hexene
D)cis-5-bromo-3-hexene
E)cis-1-bromomethyl-2-pentene

Question 47

What is the proper IUPAC name of the following compound?

A)toluene
B)phenol
C)para-dimethylbenzene
D)ortho-toluene
E)1,2-dimethylbenzene

Question 48

What type of product is formed in the reaction between an alkene and a hydrogen halide?

A)alcohol
B)alkyl halide
C)triol
D)aldehyde
E)ketone

Question 49

What is the name of the compound formed by the chlorination (addition of Cl₂) of propene?

A)1,1-dichloropropane
B)1,2-dichloropropane
C)2,2-dichloropropane
D)1-chloropropane
E)2-chloropropane

Question 50

Margarine is made by the hydrogenation of vegetable oils.

Question 51

Which of the following correctly match the IUPAC and common system for naming a benzene with two groups attached?

A)1,2-dichlorobenzene and meta-dichlorobenzene
B)2-bromotoluene and ortho-bromotoluene
C)1-bromo-2-chlorobenzene, para-bromochlorobenzene
D)5-chlorotoluene, meta-chlorotoluene
E)2-bromotoluene and ortho-bromotoluene and 1-bromo-2-chlorobenzene, para-bromochlorobenzene

Question 52

What are the health risks associated with trans-fatty acids?

A)elevated levels of LDL (bad) cholesterol
B)decreased levels of HDL (good) cholesterol
C)increased risk of developing type-2 diabetes
D)All of the choices are correct.
E)None of the choices are correct.

Question 53

What is the proper name of the product formed by the hydrogenation of 2-octene?

A)2-octane
B)1-octene
C)2-octyne
D)octane
E)cyclooctane

Question 54

The molecular formula of 3-octene is C₈H₁₆.

Question 55

What is the IUPAC name of the simplest alkene?

A)cyclopropene
B)methene
C)propyne
D)ethylene
E)ethene

Question 56

The common name of ethyne is acetylene.

Question 57

Which of the following reaction types is most characteristic of aromatic compounds?

A)substitution
B)addition
C)elimination
D)combination
E)decomposition

Question 58

para-Chlorotoluene is the name of an organic compound.Based on its name, what information about the structure of this compound is FALSE?

A)It is an alkene.
B)The structure contains a benzene ring.
C)A methyl group and a chlorine atom are present as substituents.
D)The substituents that are present have a 1,4 relationship.
E)All of these are correct.

Question 59

The polymer shown was formed by the addition polymerization of an alkene. What is the molecular formula of the alkene that formed the polymer?

A)C₂H₂Cl₂
B)C₂H₃Cl
C)C₃H₅Cl
D)C₃H₇Cl
E)C₄H₆Cl₂

Question 60

What are the bond angles around the carbon atoms in CH₂=CH₂?

A)180^o
B)150^o
C)120^o
D)109.5^o
E)90^o

Question 61

Palladium is a catalyst used in hydrogenation.

Question 62

Aromatic compounds undergo addition reactions more readily than substitution reactions because they are extremely stable compounds.

Question 63

Hydration of an alkene produces a ketone.

Question 64

The names ortho-dimethylbenzene and 1,2-dimethylbenzene represent the same compound.

Question 65

Pyridine, shown below, is a heterocyclic aromatic compound.