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

Questions
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
3 What will be the attacking electrophile in this reaction?

Organic Chemistry

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?

Organic Chemsitry

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?

Organic Chemsitry

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?

Organic Chemistry

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?

Organic Chemistry

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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