Question 1

The number of mononitro products that can be produced when the following reactant is treated with nitric and sulfuric acids is _______.

Accepted Answer

The answer of The number of mononitro products that can...

Question 2

Which of the following is the reactive intermediate formed in the electrophilic bromination of toluene with Br2, FeBr3? 2, FeBr3?   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) C) and D)
F) B) and D)

Question 3

All of the following can act as an electrophile in an electrophilic aromatic substitution reaction.
SO3 (CH3)3C+ NO2+

Accepted Answer

A) True 
 B)False

Question 4

Provide the structure (a single resonance contributor) of the key intermediate in the following reaction
.

Accepted Answer

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

Question 5

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

Accepted Answer

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

Question 6

What is the electrophile in the reaction of benzene with a mixture of nitric acid and sulfuric acid?

Accepted Answer

A)  HONO
B)  NO+
C)  NO2+
D)  benzeneE) None of the above
F) C) and D)

Question 7

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

Accepted Answer

A)  COCH3
B)  NH3
C)  Br
D)  CH2CH3E) None of the above
F) B) and C)

Question 8

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

Accepted Answer

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

Question 9

In electrophilic aromatic substitution reactions, the following molecule are considered to be ______ reactive than benzene

Accepted Answer

The answer of In electrophilic aromatic substitution reactions, the following...

Question 10

What is the role of AlCl3 in Friedel Crafts acylations using acid chlorides?

Accepted Answer

A)  Lewis acid
B)  electrophile
C)  base
D)  nucleophileE) A) and B)
F) A) and C)

Question 11

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

Accepted Answer

A)  Cl, OH, CH2CH3
B)  CH3, Br, COCH3
C)  CH3, NH2, OH
D)  COCH3, NO2, BrE) C) and D)
F) None of the above

Question 12

Which of the following undergoes the most rapid acylation upon treatment with acetyl chloride and AlCl3?

Accepted Answer

A)  benzene
B)  toluene
C)  chlorobenzene
D)  1,4-dichlorobenzeneE) A) and D)
F) A) and C)

Question 13

Which of the following is the reactive intermediate formed in the electrophilic nitration of nitrobenzene with HNO3 and H2SO4? 3 and H2SO4?   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) C) and D)
F) All of the above

Question 14

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

Question 15

Which of the following is not true about benzynes?

Accepted Answer

A)  They are planar
B)  They are formed upon dehydrohalogenation of aryl halides
C)  They are aromatic
D)  They are intermediates in nucleophilic aromatic substitution reaction which take place by an addition-elimination mechanismE) B) and D)
F) A) and D)

Question 16

MATCHING
MATCH a structure or term from the following list with each description below. Place the letter of the structure or term in the blank to the left of the description.
-______ The reactive electrophile in Friedel-Crafts acylation reactions.

Accepted Answer

A)  benzyne
B)  "+NO2"
C)  R3C+
D)  electron-donating
E)  "+NO"F) Meisenheimer complexG) +NO2  
C)  R3C+ 
D)  electron-donating 
E)   +NO  F) Meisenheimer complex G)   H) electron-withdrawing" class="answers-bank-image d-inline" rel="preload" >H) electron-withdrawingI) A) and F)
J) D) and F)

Question 17

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

Accepted Answer

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

Question 18

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

Accepted Answer

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

Question 19

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

Question 20

Which of the following cannot be prepared from benzene in two synthetic steps?

Accepted Answer

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

Exam 22: Reactions of Benzene and Its Derivatives

Which of the following is the reactive intermediate formed in the electrophilic nitration of nitrobenzene with HNO3 and H2SO4?

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

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Which of the following is not true about benzynes?

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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 reaction?

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In electrophilic aromatic substitution reactions, the following molecule are considered to be ______ reactive than benzene

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

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All of the following can act as an electrophile in an electrophilic aromatic substitution reaction. SO3 (CH3)3C+ NO2+

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MATCHING MATCH a structure or term from the following list with each description below. Place the letter of the structure or term in the blank to the left of the description. -______ The reactive electrophile in Friedel-Crafts acylation reactions.

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Provide the structure (a single resonance contributor) of the key intermediate in the following reaction .

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Which of the following undergoes the most rapid acylation upon treatment with acetyl chloride and AlCl3?

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Which of the following is the reactive intermediate formed in the electrophilic bromination of toluene with Br2, FeBr3?

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

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What is the electrophile in the reaction of benzene with a mixture of nitric acid and sulfuric acid?

Correct AnswerverifiedShow Answer

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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Which of the following cannot be prepared from benzene in two synthetic steps?

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What is the role of AlCl3 in Friedel Crafts acylations using acid chlorides?

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Which of the following sets of substituents are all deactivating 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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The number of mononitro products that can be produced when the following reactant is treated with nitric and sulfuric acids is _______.

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Which of the following is the reactive intermediate formed in the electrophilic nitration of nitrobenzene with HNO₃ and H₂SO₄?

Correct Answer
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All of the following can act as an electrophile in an electrophilic aromatic substitution reaction. SO₃(CH₃)₃C⁺ NO₂⁺

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Which of the following undergoes the most rapid acylation upon treatment with acetyl chloride and AlCl₃?

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Which of the following is the reactive intermediate formed in the electrophilic bromination of toluene with Br₂, FeBr₃?

Correct Answer
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What is the role of AlCl₃ in Friedel Crafts acylations using acid chlorides?

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