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Organic Chemistry Questions and Answers – Electrophilic Aromatic Substitution | Organic Chemistry Multiple Choice Questions and Answers

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Free download in PDF Organic Chemistry Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>

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(1) What will be the product formed when phenol reacts with Br2 in CCl4 medium?
[A] 3-Bromophenol
[B] 4- Bromophenol
[C] 3,5-Dibromophenol
[D] 2,4,6-Tribromophenol
Answer: 4- Bromophenol
(2) What is the electrophile in the electrophilic substitution reaction of benzene using oleum and conc. H2SO4?
[A] SO3
[B] NO3
[C] NO2+
[D] NO+
Answer: SO3

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(3) What will be the attacking electrophile in this reaction?

[A] Carbanion
[B] Halonium
[C] Radical
[D] Transition state
Answer: Halonium
(4) Which of the following aromatic compounds undergo Friedel–Crafts alkylation with methyl chloride and aluminum chloride?
[A] Benzoic acid
[B] Nitrobenzene
[C] Toluene
[D] Aniline
Answer: Toluene
(5) What will be the product in the given reaction?

[A] m-chlorophenol
[B] o-chlorophenol and p-chlorophenol
[C] o-hydroxytoluene and p-hydroxytoluene
[D] m-hydroxytoluene
Answer: o-hydroxytoluene and p-hydroxytoluene
(6) What is the electrophile in the acylation of benzene?
[A] AlCl3
[B] CO+
[C] Cl+
[D] R-CO+
Answer: R-CO+
(7) How would you synthesis the following reaction?

[A] conc. HNO3 + conc. H2SO4
[B] conc. HNO3
[C] anhydrous AlCl3 + Ph-NO2
[D] conc. H2SO4 + Oleum
Answer: conc. HNO3 + conc. H2SO4
(8) Which of the following reactants can be used to carry out following reaction?

[A] conc. HNO3 + conc. H2SO4
[B] HCl + CO + AlCl3
[C] anhydrous AlCl3 + Ph-NO2
[D] conc. H2SO4 + Oleum
Answer: HCl + CO + AlCl3
(9) What will be the product in the given reaction?

[A] m-chlorotoluene
[B] o-chlorotoluene and p-chlorotoluene
[C] 1-chloro-3-methylbenzene
[D] no reaction
Answer: no reaction
(10) Which of the following is the most activating in electrophilic aromatic substitution?
[A] -NO2
[B] -NHCOCH3
[C] -CN
[D] -NH2
Answer: -NH2

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