Deck 12: Alkenes, Alkynes, and Aromatic Compounds

Question 1

The compound 1-butyne contains

A) all single bonds.
B) a double bond.
C) a triple bond.
D) a ring structure.
E) a bromine atom.

Answer 1

a triple bond.

Question 2

Which of the compounds is a cycloalkene?

A) CH₂ = CHCH = CH₂
B)
C) CH3C = CH₂
D)
E)

Answer 2

Question 3

What is the condensed structural formula of the compound propene?

A) CH3CH₂CH3
B) H3C = CH₂CH3
C) H₂C = C = CH₂
D) CH3CH = CH₂
E) HC ≡ CCH3

Answer 3

CH3CH = CH₂

Question 4

What is the IUPAC name for the following compound?

A) 4-chloro-4,5-dimethyl-2-hexene
B) 3-chloro-1,3,4-trimethyl-1-pentene
C) 3-chloro-2,3-dimethyl-4-hexene
D) 3-chloro-2,3,5-trimethyl-4-pentene
E) 3-chloro-1,3,4,4-tetramethyl-1-butene

Question 5

Which of the following compounds is an alkyne?

A) CH3CH₂CH3
B) C₃H6
C) CH3CH₂C ≡ CH
D) H₂C = CHCH = CH₂
E) 2-pentene

Question 6

A hydrocarbon with a double bond is a(n)

A) alkane.
B) alkene.
C) alkyne.
D) alcohol.
E) saturated compound.

Question 7

The IUPAC name for ethylene is

A) ethane.
B) cycloethane.
C) ethyne.
D) ethanene.
E) ethene.

Question 8

Name the following compound.

A) 3-butyl-3-propyl-1-pentyne
B) 3-butyl-3-propyl-4-pentyne
C) 3-ethyl-3-propyl-1-heptyne
D) 5-ethyl-5-propyl-6-heptyne
E) 3-ethyl-3-butyl-1-hexyne

Question 9

The IUPAC name for CH₃CH₂C ≡ CCH₃ is

A) 3-pentyne.
B) 2-pentyne.
C) pentyne.
D) 1-methylbutyne.
E) 2-propene.

Question 10

Name the following compound.

A) 2,2-diethylpenatane
B) 2,2-diethylpentene
C) 4-ethyl-4-methyl-5-hexene
D) 3-ethyl-3-methyl-1-hexene
E) 4-ethyl-4-methylhexane

Question 11

Which one of the following compounds has the smallest number of hydrogen atoms?

A) butyne
B) 2-methylpropane
C) butene
D) 2-methylcyclopropane
E) butane

Question 12

When naming an alkene, the parent chain is the longest carbon chain

A) that does not contain the double bond.
B) regardless of whether or not it contains the double bond.
C) that contains at least one of the carbon atoms of the double bond.
D) that contains both atoms of the double bond.
E) that contains a branch.

Question 13

Alkenes and alkynes are called unsaturated compounds because

A) they have the maximum number of hydrogen atoms attached to each carbon in the compound.
B) they have fewer hydrogen atoms attached to the carbon chain than alkanes.
C) they have more hydrogen atoms attached to the carbon chain than alkanes.
D) they have more carbon atoms than alkanes.
E) they have fewer carbon atoms than alkanes.

Question 14

The carbon atoms in saturated hydrocarbons

A) have only single bonds.
B) contain at least one double bond.
C) contain at least one triple bond.
D) contain a benzene ring.
E) contain both a double and a triple bond.

Question 15

Organic compounds with double or triple bonds are classified as

A) unsaturated compounds.
B) saturated compounds.
C) dilute solutions.
D) concentrated solutions.
E) substituted compounds.

Question 16

Which of the following is the IUPAC name for the compound below?

A) m-bromotoluene
B) m-bromomethylcyclohexene
C) 1-bromo-3-methylcyclohexene
D) 3-bromo-1-methyl-2-cyclohexene
E) 2-bromo-6-methylcyclohexene

Question 17

What is the condensed structural formula for the compound 3-hexene?

A)
B) CH₂= CHCH₂CH₂CH₂CH3
C) CH3CH₂CH = CHCH₂CH3
D) CH3CH₂CH₂CH = CHCH3
E) CH3CH = CHCH₂CH₂CH3

Question 18

Which of the following names are correct?

A) 3-butyl-4-pentene
B) 3-ethyl-1-heptene
C) 3-etheneheptane
D) 5-ethyl-6-heptene
E) All of the above are correct.

Question 19

The IUPAC name of CH₃CH = CHCH₃ is

A) 2-butene.
B) 2-butane.
C) 1-butene.
D) butene.
E) 2-butyne.

Question 20

An unsaturated compound always

A) is a cycloalkane.
B) contains a double bond.
C) contains a triple bond.
D) contains at least one double or triple bond.
E) is aromatic.

Question 21

Which of the following pairs of compounds are cis-trans isomers?

A)
B)
C) HC ≡ C - CH3 and CH3- C ≡ CH
D)
E)

Question 22

The chemical reaction of 2-butene and HCl yields what product?

A) CH₃CH₂CH₂CH₃
B)
C)
D)
E)

Question 23

According to Markovnikov's rule, the hydrogen in HCl adds to the carbon in the double bond

A) attached to the end carbon.
B) that has the smaller number of hydrogen atoms attached.
C) that has the greater number of hydrogen atoms attached.
D) that has the smaller number of carbon atoms attached.
E) that has the greater number of carbon atoms attached.

Question 24

The reaction of hydrogen (H₂) and propene using a platinum catalyst is called

A) combustion.
B) substitution.
C) addition.
D) neutralization.
E) condensation.

Question 25

Which of the following is the correct structural formula for 3-methylcyclohexene?

A)
B)
C)
D)
E)

Question 26

Insects communicate with chemicals called

A) markers.
B) isomers.
C) signals.
D) pheromones.
E) scents.

Question 27

The reaction of an alkene and water in the presence of an acid catalyst to produce an alcohol is called

A) hydrolysis.
B) alkoholysis.
C) halogenation.
D) hydration.
E) hydrohydration.

Question 28

What is the name of the compound shown below?

A) 2-pentene
B) trans-2-pentene
C) trans-3-pentene
D) cis-2-pentene
E) cis-3-pentene

Question 29

The hydrogenation of an alkene gives a(n).

A) alkane.
B) alkene.
C) alkyne.
D) benzene.
E) isomer.

Question 30

Some alkenes have cis-trans isomers because

A) the carbon atoms in the double bond cannot rotate.
B) each of the carbon atoms in the double bond has four different groups attached to it.
C) one of the carbon atoms in the double bond has two identical groups attached to it.
D) the carbon atoms in the double bond are free to rotate.
E) all of the carbon atoms in the compound are rigid and cannot rotate.

Question 31

The reactants needed to produce the compound chlorocyclopentane are

A) pentene and HCl.
B) pentene and Cl₂
C) cyclopentane and Cl₂
D) cyclopentene and HCl.
E) cyclopentene and Cl₂

Question 32

The major product of the reaction of 3-methyl-2-pentene with HCl is

A) 4-chloro-3-methylpentane.
B) 1-chloro-3-methylpentane.
C) 2-chloro-3-methylpentane.
D) 3-chloro-3-methylpentane.
E) 3-chloro-3-methylpentene.

Question 33

Which of the following compounds exhibit geometric isomerism?

A) CH₂=CH-CH3
B) CCl₂=CBr₂
C) CH3-CH=CH-CH3
D) CCl₂=CHBr
E) All of the above exhibit geometric isomerism.

Question 34

The reaction of propene and Br₂ yields

A) 1-bromopropane.
B) 2-bromopropane.
C) 1,1-dibromopropane.
D) 1,2-dibromopropane.
E) 2,2-dibromopropane.

Question 35

What is the condensed structural formula for the product of the hydrogenation of 2-butene using a platinum catalyst?

A) CH3CH = CHCH3
B) Cl |
CH3CH₂CHCH3
C) CH3CH₂CH₂CH3
D)
E)

Question 36

What is the major product of the reaction shown below? CH3- CH₂- CH = CH₂ + HOH

A)
B)
C) CH3-CH₂-CH₂-CH₂- OH
D)
E)

Question 37

What is the product of this reaction? CH3CH₂CH = CHCH3 + Cl₂ → ?

A) CH3CH₂CH₂CH₂CH3
B)
C)
D)
E)

Question 38

The reaction of cyclohexene and Cl₂ yields

A) 1-chlorocyclohexene.
B) 1,2-dichlorocyclohexane.
C) 1,3-dichlorocyclohexane.
D) 2,3-dichlorocyclohexane.
E) 3,4-dichlorocyclohexane.

Question 39

The odors you associate with lemons, oranges, roses, and lavender are due to

A) alkenes.
B) alkanes.
C) alkynes.
D) thiols.
E) amines.

Question 40

Which set of reactants would give this compound?

A) CH₃CH?CH?CH₃ + 2HCl
B) CH₃CH $=$ CHCH₃ + 2HCl
C) CH₃CH?CH $=$ CH? + 2HCl
D) CH₃CH $=$ CHCH₃ + Cl?
E) CH₃CH?CH $=$ CH? + Cl?

Question 41

A compound that contains the ring structure of benzene is called a(n)

A) alkane.
B) cycloalkane.
C) alkyl group.
D) aromatic compound.
E) hydrocarbon.

Question 42

The compound below is named

A) cyclohexane.
B) cyclohexene.
C) cyclohexyne.
D) benzene.
E) cyclobenzene.

Question 43

How many isomers are there for dibromobenzene?

A) one
B) two
C) three
D) four
E) five

Question 44

Small molecules that make up the repeat unit in polymers are called

A) monomers.
B) alkenes.
C) alkynes.
D) minipolymers.
E) synthetic polymers.

Question 45

Alkynes contain double bonds.

Question 46

The name of the compound shown below is

A) o-ethylmethylcyclohexane.
B) m-ethylmethylcyclohexane.
C) o-ethyltoluene.
D) m-ethyltoluene.
E) p-ethyltoluene.

Question 47

The structural formula of benzene is often represented as a

A) ring of five carbon atoms.
B) ring of six carbon atoms with six double bonds.
C) ring of six carbon atoms with a circle in the center.
D) cycloalkane.
E) cycloalkyne.

Question 48

Which of the following is a naturally occurring polymer (not a synthetic polymer)?

A) polypropylene
B) DNA
C) teflon
D) polystyrene
E) saran

Question 49

All of the carbon-carbon bonds in benzene are

A) composed of only two types, single and double.
B) identical.
C) double bonds.
D) single bonds.
E) circular bonds.

Question 50

What are the prefixes used to designate substituent positions on disubstituted benzene compounds?

A) ortho-, meta-, and para-.
B) cis- and trans-
C) syn- and anti-
D) All of the above.
E) None of the above.

Question 51

Which of the following names are correct?

A) 4-bromo-2-ethylbenzene
B) 1-chloro-3-propylbenzene
C) 3-bromo-4-chlorobenzene
D) 2,2-dibromobenzene
E) 4-fluoro-2-iodobenzene

Question 52

Propylene is used to induce ripening in fruits.

Question 53

What is the starting monomer for the polymer Teflon?

A)
B)
C)
D) C $\equiv$ F
E) $\begin{array} { c } \mathrm { F } \quad\quad \mathrm { F } \\\mathrm { | }\quad\quad \mathrm { |} \\\mathrm { F } - \mathrm { C } =\mathrm { C }- \mathrm { F} \end{array}$

Question 54

When chlorine atoms are attached to carbon 1 and carbon 3 in benzene, the compound is named

A) dichlorobenzene.
B) o-dichlorobenzene.
C) m-dichlorobenzene.
D) p-dichlorobenzene.
E) j-dichlorobenzene.

Question 55

The synthetic polymer polyethylene is unreactive because it is

A) unsaturated.
B) a haloalkane.
C) saturated.
D) a cycloalkene.
E) an aromatic compound.

Question 56

What is the molecular formula of benzene?

A) C6H4
B) C6H6
C) C6H₈
D) C6H10
E) C6H12

Question 57

When bromine atoms are attached to carbon 1 and carbon 4 in benzene, the compound is named

A) dibromobenzene.
B) o-dibromobenzene.
C) m-dibromobenzene.
D) p-dibromobenzene.
E) f-dibromobenzene.

Question 58

What is the name of the compound below?

A) p-chlorotoluene
B) o-chlorotoluene
C) m-chlorotoluene
D) 1-chloro-2-methyltoluene
E) 2-chloro-1-methyltoluene

Question 59

Which of the following would result from the polymerization of ethene?

A)
B)
C)
D) = C = C = C = C =
E) - CH₂- CH₂- CH₂- CH₂-

Question 60

Long-chain molecules that consist of many repeating units are called

A) polymers.
B) monomers.
C) organic compounds.
D) alkenes.
E) alkanes.

Question 61

In a cis alkene, the groups are on the same side of the double bond.

Question 62

The substituent group C₆H₅CH₂- is called a phenyl group.

Question 63

Ortho compounds have substituents on the 1 and 3 positions of the benzene ring.

Question 64

Water can be added to alkenes to produce acids.

Question 65

Markovnikov's rule states that when a hydrogen halide adds to a double bond, the proton will bond to the carbon that has the greater number of hydrogen atoms.

Question 66

Fragrances and flavors are often compounds with more than one functional group (for example, an alkene that also contains an aldehyde).

Question 67

Polymers are large molecules consisting of repeating units.

Question 68

One essential building block of aspirin, ibuprofen, and acetaminophen is the benzene ring.

Question 69

Halogenation is the process of adding chlorine or similar elements to an alkene or alkyne.

Question 70

Para compounds have substituents on the 1 and 4 positions of the benzene ring.

Question 71

Light-induced cis-trans isomerization is an important step in vision.

Question 72

Nylon, polyester, and most other plastics are carbon compounds.

Question 73

Hydrogenation of unsaturated vegetable oils raises the melting point and makes them more solid.

Question 74

In a trans alkene, the groups are on the same side of the double bond.

Question 75

Hydration is used to convert alkenes and alkynes to alkanes.

Question 76

Most products made from polymers can be recycled.

Question 77

Alkynes can show cis-trans isomerism.

Question 78

An alkynes containing three carbons is named propyne.

Question 79

Hydrogenation is used to convert alkenes and alkynes to alkanes.

Question 80

All alkenes show cis-trans isomerism.