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What is (are) the product(s) of the following reaction? What is (are) the product(s) of the following reaction? A) Only I B) Only II C) Only III D) I and II


A) Only I
B) Only II
C) Only III
D) I and II

E) A) and B)
F) B) and C)

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B

Which of the following statements about an E1 mechanism is not true?


A) It is a two-step process and has the same first step as an SN1 mechanism.
B) It involves the formation of a carbocation from eliminating a good leaving group.
C) A common competing reaction is rearrangement of a less stable carbocation to a more stable carbocation.
D) The loss of a proton by the carbocation is a slow step.

E) A) and B)
F) A) and C)

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Which of the following statements about an E1 mechanism is true?


A) The identity of the leaving group affects the rate of reaction.
B) The reaction follows second-order kinetics.
C) The reaction is slowest with tertiary substrates.
D) Polar aprotic solvents favor the E1 mechanism.

E) All of the above
F) C) and D)

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What is the product of the following reaction? What is the product of the following reaction? A) I B) II C) III D) IV


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

E) B) and C)
F) All of the above

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Which of the following statements about the mechanism of an E2 reaction is true?


A) All bonds are broken and formed in multiple steps.
B) The reaction is not concerted.
C) Entropy favors the reactants of an E2 reaction.
D) Entropy favors the products of an E2 reaction.

E) None of the above
F) A) and B)

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What is (are) the product(s) of the following reaction? What is (are) the product(s) of the following reaction? A) I and II B) II and III C) I and III D) I, II, and III


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

E) A) and B)
F) All of the above

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D

Which of the following alkenes is the most stable? Which of the following alkenes is the most stable? A) I B) II C) III D) IV


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

E) B) and C)
F) B) and D)

Correct Answer

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A

What is (are) the product(s) of the following reaction? What is (are) the product(s) of the following reaction? A) Only I B) Only II C) Only III D) II and III


A) Only I
B) Only II
C) Only III
D) II and III

E) None of the above
F) A) and B)

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What is the major elimination product obtained from the following reaction? What is the major elimination product obtained from the following reaction? A) I B) II C) III D) IV


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

E) A) and D)
F) A) and C)

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Which of the following is the dihalide that can be used to prepare the alkyne below? Which of the following is the dihalide that can be used to prepare the alkyne below? A) I and II B) II and III C) I and III D) I, II, and III


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

E) B) and C)
F) None of the above

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Classify each alkene in vitamin D3 labeled I, II, III by the number of carbon substituents bonded to the double bond. Classify each alkene in vitamin D<sub>3</sub> labeled I, II, III by the number of carbon substituents bonded to the double bond. A) I = Disubstituted; II = trisubstituted; III = trisubstituted. B) I = Monosubstituted; II = disubstituted; III = trisubstituted. C) I = Disubstituted; II = disubstituted; III = trisubstituted. D) I = Disubstituted; II = trisubstituted; III = disubstituted.


A) I = Disubstituted; II = trisubstituted; III = trisubstituted.
B) I = Monosubstituted; II = disubstituted; III = trisubstituted.
C) I = Disubstituted; II = disubstituted; III = trisubstituted.
D) I = Disubstituted; II = trisubstituted; III = disubstituted.

E) None of the above
F) A) and B)

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Which of the following alkyl chloride affords alkene A exclusively under E2 reaction condition? Which of the following alkyl chloride affords alkene A exclusively under E2 reaction condition? A) I B) II C) III D) IV


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

E) C) and D)
F) B) and C)

Correct Answer

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Which of the following statements about an E1 mechanism is not true?


A) The reaction is fastest with tertiary alkyl halides.
B) A better leaving group makes the reaction rate increase.
C) The reaction follows first-order kinetics.
D) Stronger bases favor the E1 reaction.

E) A) and B)
F) B) and C)

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How many different E2 products can form from the dehydrohalogenation of 2-bromobutane?


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

E) A) and B)
F) B) and C)

Correct Answer

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Which of the following is the dihalide that can be used to prepare the alkyne below? Which of the following is the dihalide that can be used to prepare the alkyne below? A) Only I B) Only II C) Only III D) II and III


A) Only I
B) Only II
C) Only III
D) II and III

E) All of the above
F) A) and B)

Correct Answer

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Which of the labeled protons in the compound below is most readily abstracted under E2 conditions? Which of the labeled protons in the compound below is most readily abstracted under E2 conditions? A) H<sub>a</sub> B) H<sub>b</sub> C) H<sub>c</sub> D) H<sub>d</sub>


A) Ha
B) Hb
C) Hc
D) Hd

E) C) and D)
F) B) and C)

Correct Answer

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Which of the following is the least reactive substrate in an E2 reaction? Which of the following is the least reactive substrate in an E2 reaction? A) I B) II C) III D) IV


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

E) A) and B)
F) All of the above

Correct Answer

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Which of the following alkyl halide reacts the fastest in an E2 reaction? Which of the following alkyl halide reacts the fastest in an E2 reaction? A) I B) II C) III D) IV


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

E) All of the above
F) C) and D)

Correct Answer

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What is the most likely mechanism for the reaction below? What is the most likely mechanism for the reaction below? A) S<sub>N</sub>1 B) S<sub>N</sub>2 C) E1 D) E2


A) SN1
B) SN2
C) E1
D) E2

E) A) and D)
F) B) and D)

Correct Answer

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What is the major elimination product obtained from the following reaction? What is the major elimination product obtained from the following reaction? A) I B) II C) III D) IV


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

E) A) and B)
F) A) and C)

Correct Answer

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