Question 1

Which of the following are valid resonance structures of the electophile involved in Friedel-Crafts acylation of benzene upon treatment with CH3COCl and AlCl3? 3COCl and AlCl3?   A)  1 B)  2 C)  3 D)  4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) All of the above
F) B) and C)

Question 2

Which of the following sets of substituents are all ortho/para directing in electrophilic aromatic substitution reactions?

Accepted Answer

A)   Cl, CH3, CN
B)   Br, OH, COCH3
C)   Cl, OH, CH3
D)   CN, NO2, COCH3E) B) and C)
F) C) and D)

Question 3

What is the electrophile in the reaction of benzene with tert-butyl chloride and AlCl3?

Accepted Answer

A)   CH3+
B)   Cl+
C)   (CH3) C+
D)   benzeneE) A) and B)
F) A) and C)

Question 4

Which of the following sets of reagents does not result in alkylation of benzene?

Accepted Answer

A)   tert-butyl chloride + AlCl3
B)   tert-butyl alcohol + H3PO4
C)   methylpropene + HF
D)   methylpropane + H2SO4E) A) and C)
F) A) and B)

Question 5

What is the major organic product obtained from the following sequence of reactions?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) None of the above
F) A) and B)

Question 6

Which of the following sets of substituents are all meta directing in electrophilic aromatic substitution reactions?

Accepted Answer

A)   CN, NO2, COCH3
B)   CH3, OCH3, COCH3
C)   Cl, NH2, CH3
D)   CH3, NH3, OCH3E) B) and C)
F) None of the above

Question 7

Which of the following reactions or reaction sequences will not give isopropylbenzene as the major product?

Accepted Answer

A)   treatment of benzene with isopropyl alcohol and HF
B)   treatment of benzene with 1-chloropropane and AlCl3
C)   treatment of benzene with propanoyl chloride and AlCl3; followed by reaction with Zn(Hg)  and HCl
D)   treatment of benzene with 1-propene and HFE) A) and D)
F) None of the above

Question 8

Which of the following is the structure of the complex of Br2 with FeBr3 involved in the electrophilic bromination of benzene? 2 with FeBr3 involved in the electrophilic bromination of benzene?   A)  1 B)  2 C)  3 D)  4" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and C)
F) A) and B)

Question 9

Which of the following sets of substituents are all activating groups in electrophilic aromatic substitution reactions?

Accepted Answer

A)   Br, NH2, CH3
B)   CH3, NH2, OCH3
C)   OH, COCH3, CH3,
D)   Br, CN, NO2E) B) and C)
F) A) and B)

Question 10

What is the major organic product obtained from the following reaction?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and B)
F) A) and C)

Question 11

What is the major organic product obtained from the following reaction?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) None of the above
F) C) and D)

Question 12

What is the major organic product obtained from the following sequence of reactions?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and B)
F) A) and C)

Question 13

What is the major organic product obtained from the following reaction?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and D)
F) B) and C)

Question 14

What is the major organic product obtained from the following reaction?

Accepted Answer

The answer of What is the major organic product obtained...

Question 15

What is the major organic product obtained from the following reaction?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) A) and B)
F) None of the above

Question 16

What type of intermediate is formed upon treatment of 1-chloro-2,4-dinitrobenzene with sodium hydroxide to give 2,4-dinitrophenol?

Accepted Answer

A)   Meisenheimer complex
B)   benzyne
C)   cyclohexadienyl cation
D)   benzyl radicalE) A) and D)
F) All of the above

Question 17

Which of the following sets of substituents are all activating groups in electrophilic aromatic substitution reactions?

Accepted Answer

A)   CH3, OCH3, COCH3
B)   Cl, CN, NO2
C)   Cl, NH2, CH3
D)   CH3, NH2, OCH3E) None of the above
F) A) and C)

Question 18

Provide the structure (a single resonance contributor) of the key intermediate in the electrophilic aromatic nitration of chlorobenzene.

Accepted Answer

The answer of Provide the structure (a single resonance contributor)...

Question 19

Which of the following substituents is ortho/para directing and deactivating in electrophilic aromatic substitution reactions?

Accepted Answer

A)   OH
B)   Cl
C)   CH3
D)   NO2E) None of the above
F) All of the above

Question 20

What is the major organic product obtained from the following sequence of reactions?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) B) and C)
F) None of the above

Exam 22: Reactions of Benzene and Its Derivatives

What is the major organic product obtained from the following reaction?

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Which of the following reactions or reaction sequences will not give isopropylbenzene as the major product?

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Which of the following are valid resonance structures of the electophile involved in Friedel-Crafts acylation of benzene upon treatment with CH3COCl and AlCl3?

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Which of the following sets of substituents are all activating groups in electrophilic aromatic substitution reactions?

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What is the major organic product obtained from the following reaction?

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Which of the following sets of reagents does not result in alkylation of benzene?

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Which of the following is the structure of the complex of Br2 with FeBr3 involved in the electrophilic bromination of benzene?

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Which of the following substituents is ortho/para directing and deactivating in electrophilic aromatic substitution reactions?

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What is the major organic product obtained from the following reaction?

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What type of intermediate is formed upon treatment of 1-chloro-2,4-dinitrobenzene with sodium hydroxide to give 2,4-dinitrophenol?

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What is the major organic product obtained from the following reaction?

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What is the major organic product obtained from the following sequence of reactions?

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Which of the following sets of substituents are all meta directing in electrophilic aromatic substitution reactions?

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Which of the following sets of substituents are all activating groups in electrophilic aromatic substitution reactions?

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What is the major organic product obtained from the following sequence of reactions?

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What is the major organic product obtained from the following reaction?

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What is the major organic product obtained from the following sequence of reactions?

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What is the electrophile in the reaction of benzene with tert-butyl chloride and AlCl3?

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Which of the following sets of substituents are all ortho/para directing in electrophilic aromatic substitution reactions?

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Provide the structure (a single resonance contributor) of the key intermediate in the electrophilic aromatic nitration of chlorobenzene.

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Which of the following are valid resonance structures of the electophile involved in Friedel-Crafts acylation of benzene upon treatment with CH₃COCl and AlCl₃?

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Which of the following is the structure of the complex of Br₂ with FeBr₃ involved in the electrophilic bromination of benzene?

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What is the electrophile in the reaction of benzene with tert-butyl chloride and AlCl₃?

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