Question 1

The reaction of Br2/CCl4 to cyclohexene would produce the compound(s)represented by structure(s):

Accepted Answer

A) I alone 
B) II alone 
C) II and III 
D) III alone 
E) I,II,and II 
A) I alone 
B) II alone 
C) II and III 
D) III alone 
E) I,II,and II

Question 2

Which of these compounds is not formed when gaseous ethene is bubbled into an aqueous solution of bromine,sodium chloride and sodium nitrate?

Accepted Answer

A) BrCH2CH2Br 
B) BrCH2CH2Cl 
C) BrCH2CH2OH 
D) ClCH2CH2OH 
E) BrCH2CH2ONO2 
A) BrCH2CH2Br 
B) BrCH2CH2Cl 
C) BrCH2CH2OH 
D) ClCH2CH2OH 
E) BrCH2CH2ONO2

Question 3

What would be the major product of the following reaction?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 4

What is the major product for the following reaction?

Accepted Answer

A)    
B)    
C)    
D)    
E) More than one of these choices. 
A)    
B)    
C)    
D)    
E) More than one of these choices.

Question 5

When a particular stereoisomer reacts in such a way that it gives a particular stereoisomer as a product,even if more than one stereoisomer is theoretically possible,the reaction is said to be ___.

Accepted Answer

The answer of When a particular stereoisomer reacts in such...

Question 6

2-Pentyne will not react with:

Accepted Answer

A) H2,Pt 
B) Br2 
C) NH3 
D) H2SO4 
E) KMnO4/H2O 
A) H2,Pt 
B) Br2 
C) NH3 
D) H2SO4 
E) KMnO4/H2O

Question 7

What is the major product of the following reaction sequence?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 8

Determine a possible structure for an alkene,X,formula C9H14,on the basis of the following information: X adds one mole of hydrogen on catalytic hydrogenation.On treatment with hot basic KMnO4 followed by acidification,X yields the following dicarboxylic acid.   A possible structure for X might be:

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 9

The "decolorization" of molecular bromine is often used as a functional group test to detect the presence of ___.

Accepted Answer

carbon-carbon multip

Question 10

What is the major product of the following reaction sequence?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 11

Which reagent or test could be used to distinguish between 3-pentyne and 1-pentyne?

Accepted Answer

A) Br2/CCl4 
B) IR examination 
C) Concd.H2SO4 
D) KMnO4,OH- 
E) None of these choices. 
A) Br2/CCl4 
B) IR examination 
C) Concd.H2SO4 
D) KMnO4,OH- 
E) None of these choices.

Question 12

The yields for an acid catalyzed hydration of an alkene can be increased by using dilute acid as this will help drive the equilibrium to products.

Accepted Answer

A) True 
 B)False

Question 13

The most resistant compound to the action of hot alkaline KMnO4 is:

Accepted Answer

A) Pentane 
B) 1-Pentene 
C) 2-Pentene 
D) 2-Pentyne 
E) Cyclopentene 
A) Pentane 
B) 1-Pentene 
C) 2-Pentene 
D) 2-Pentyne 
E) Cyclopentene

Question 14

Which of these compounds will react with cold concd.H2SO4,as well as Br2 in CCl4?

Accepted Answer

A) CH3CH2CH=CHCH3 
B) CH3CH2CH2CH=CH2 
C) CH3CH2C$\equiv$CCH3 
D) (CH3)2CHC$\equiv$CH 
E) All of these choices. 
A) CH3CH2CH=CHCH3 
B) CH3CH2CH2CH=CH2 
C) CH3CH2C$\equiv$CCH3 
D) (CH3)2CHC$\equiv$CH 
E) All of these choices.

Question 15

What is the major product of the following reaction sequence?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 16

A synthetic strategy for converting trans-2-butene into pure cis-2-butene would consist of which of the following?

Accepted Answer

A) Reaction with H2,Ni2B (P-2) 
B) Reaction with i)Br2,CCl4; ii)2 NaNH2,NH3(l); iii)Na,NH3 (l) 
C) Reaction with H3O+,heat 
D) Reaction with i)Br2,CCl4; ii)2 NaNH2,NH3(l); iii)H2,Ni2B (P-2) 
E) None of these will successfully effect the desired transformation. 
A) Reaction with H2,Ni2B (P-2) 
B) Reaction with i)Br2,CCl4; ii)2 NaNH2,NH3(l); iii)Na,NH3 (l) 
C) Reaction with H3O+,heat 
D) Reaction with i)Br2,CCl4; ii)2 NaNH2,NH3(l); iii)H2,Ni2B (P-2) 
E) None of these will successfully effect the desired transformation.

Question 17

Which reagent or test could be used to distinguish between 2-methyl-2-pentene and 2-methylpentane?

Accepted Answer

A) Br2/CCl4 
B) KMnO4,OH- 
C) Concd.H2SO4 
D) Two of these choices. 
E) All of these choices. 
A) Br2/CCl4 
B) KMnO4,OH- 
C) Concd.H2SO4 
D) Two of these choices. 
E) All of these choices.

Question 18

What product would you expect from addition of deuterium chloride to 2-cyclohexyl-4-methyl-2-pentene?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 19

An alkene with the molecular formula C10H18  is treated with ozone and then with zinc and acetic acid.The only product isolated from these reactions is:   What is the structure of the alkene?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 20

Which of the following reactions of cyclobutene would yield a meso product?

Accepted Answer

A) reaction with H3O+,H2O 
B) reaction with Br2,CCl4 
C) reaction with Cl2,CCl4 
D) reaction with D2,Pt 
E) reaction with hot,alkaline KMnO4,followed by acid workup 
A) reaction with H3O+,H2O 
B) reaction with Br2,CCl4 
C) reaction with Cl2,CCl4 
D) reaction with D2,Pt 
E) reaction with hot,alkaline KMnO4,followed by acid workup

Exam 8: Alkenes and Alkynes II

The reaction of Br2/CCl4 to cyclohexene would produce the compound(s)represented by structure(s):

Which of these compounds is not formed when gaseous ethene is bubbled into an aqueous solution of bromine,sodium chloride and sodium nitrate?

What would be the major product of the following reaction?

What is the major product for the following reaction?

When a particular stereoisomer reacts in such a way that it gives a particular stereoisomer as a product,even if more than one stereoisomer is theoretically possible,the reaction is said to be ___.

2-Pentyne will not react with:

What is the major product of the following reaction sequence?

Determine a possible structure for an alkene,X,formula C9H14,on the basis of the following information: X adds one mole of hydrogen on catalytic hydrogenation.On treatment with hot basic KMnO4 followed by acidification,X yields the following dicarboxylic acid. A possible structure for X might be:

The "decolorization" of molecular bromine is often used as a functional group test to detect the presence of ___.

What is the major product of the following reaction sequence?

Which reagent or test could be used to distinguish between 3-pentyne and 1-pentyne?

The yields for an acid catalyzed hydration of an alkene can be increased by using dilute acid as this will help drive the equilibrium to products.

The most resistant compound to the action of hot alkaline KMnO4 is:

Which of these compounds will react with cold concd.H2SO4,as well as Br2 in CCl4?

What is the major product of the following reaction sequence?

A synthetic strategy for converting trans-2-butene into pure cis-2-butene would consist of which of the following?

Which reagent or test could be used to distinguish between 2-methyl-2-pentene and 2-methylpentane?

What product would you expect from addition of deuterium chloride to 2-cyclohexyl-4-methyl-2-pentene?

An alkene with the molecular formula C10H18 is treated with ozone and then with zinc and acetic acid.The only product isolated from these reactions is: What is the structure of the alkene?

Which of the following reactions of cyclobutene would yield a meso product?

The Basics

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids and Protein Synthesis

Filters

The reaction of Br₂/CCl₄ to cyclohexene would produce the compound(s)represented by structure(s):

The most resistant compound to the action of hot alkaline KMnO₄ is:

Which of these compounds will react with cold concd.H₂SO₄,as well as Br₂ in CCl₄?

An alkene with the molecular formula C₁₀H₁₈ is treated with ozone and then with zinc and acetic acid.The only product isolated from these reactions is: What is the structure of the alkene?