Question 1

How many isomers are there for dibromobenzene?

Accepted Answer

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

Question 2

Which of the following compounds is an alkyne?

Accepted Answer

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

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

What is the name of the compound shown below?

Accepted Answer

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

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

The compound 1-butyne contains

Accepted Answer

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

Question 8

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

Accepted Answer

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

Question 9

Some alkenes have cis-trans isomers because

Accepted Answer

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. 
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 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

All of the carbon-carbon bonds in benzene are

Accepted Answer

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

Question 13

The IUPAC name for CH3CH₂C ≡ CCH3 is

Accepted Answer

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

Question 14

The IUPAC name for ethylene is

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

Hydration is used to convert alkenes and alkynes to alkanes.

Accepted Answer

A) True 
 B)False

Question 17

Alkenes and alkynes are called unsaturated compounds because

Accepted Answer

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. 
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 18

The hydrogenation of an alkene gives a(n).

Accepted Answer

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

Question 19

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

Accepted Answer

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

Question 20

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

Accepted Answer

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. 
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.

Exam 12: Alkenes, Alkynes, and Aromatic Compounds

How many isomers are there for dibromobenzene?

Which of the following compounds is an alkyne?

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

What is the name of the compound shown below?

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

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

The compound 1-butyne contains

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

Some alkenes have cis-trans isomers because

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

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

All of the carbon-carbon bonds in benzene are

The IUPAC name for CH3CH₂C ≡ CCH3 is

The IUPAC name for ethylene is

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

Hydration is used to convert alkenes and alkynes to alkanes.

Alkenes and alkynes are called unsaturated compounds because

The hydrogenation of an alkene gives a(n).

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

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

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The IUPAC name for CH₃CH₂C ≡ CCH₃ is