Electrophilic Substitution Reaction MCQs
What does the Aromatic bromination catalyzed by the Lewis acid thalium acetate give?
(A). Meta isomer
(B). Â Ortho isomer
(C). Â Para isomer
(D). Â Para and ortho isomer
(E). None of these
Multiple Choice Question Answer: Â c
What does An activating substituent group activate?
(A). Â Ortho position
(B). Â Meta position
(C). Â Both ortho and para positions
(D). Â Para position
(E). None of these
Multiple Choice Question Answer: Â d
__________ has the highest activation of the benzene ring
(A).  –NH2
(B).  –OH
(C).   – NHCOCH3
(D).  –C6H5
(E). None of these
Multiple Choice Question Answer: Â a
_____________ act as catalysis in the nitration of benzene
(A). Â Conc. H2SO4
(B). Â Dil. HCl
(C). Conc. HCl
(D). Â Dil. H2SO4
(E). None of these
Multiple Choice Question Answer: Â a
The rate determining step in electrophilic substitution reaction is __________
(A). Â Generation of electrophile
(B). Â All of the mentioned
(C). Â Formation of product
(D). Â Attack by an electrophilic reagent on benzene ring
(E). None of these
Multiple Choice Question Answer:Â d
The necessary condition for desulphonation is ___________
(A). Â High concentration of sulphonating agent
(B). Â Low concentration of water
(C). Â Remove volatile hydrocarbon by steam distillation
(D). Â A large excess of fuming sulphuric acid
(E). None of these
Multiple Choice Question Answer: Â c
What does A deactivating substituent group direct?
(A). Â Meta position
(B). Â Para position
(C). Â Both ortho and para positions
(D). Â Ortho position
(E). None of these
Multiple Choice Question Answer: Â a
In Cannizaro reaction, two molecules of aldehydes are reacted to produce which of the following?
(A). Â Alcohol only
(B). Â Carboxylic acid only
(C). Â Â Alcohol, carboxylic acid and ketone
(D). Â Alcohol and carboxylic acid
(E). None of these
Multiple Choice Question Answer: Â d
___________ act as electrophile in halogenation
(A). Â Halonium ion
(B). Â Sulphonium ion
(C). Nitronium ion
(D). Â Acylium ion
(E). None of these
Multiple Choice Question Answer: Â a
The HBr reacts fastest with which of the following?
(A). Â Propan-2-ol
(B). Â Propan-1-ol
(C). Â 2-methylpropan-2-ol
(D). Â 2-methylpropan-1-ol
(E). None of these
Multiple Choice Question Answer: Â c
Not a product of the reaction of benzene with CH3Cl and AlCl3 is ___________
(A). Â Toulene
(B). Â P-xylene
(C). Â O-xylene
(D). Isopropyl benzene
(E). None of these
Multiple Choice Question Answer: Â d
Which of the following are The product of Friedel-Crafts Acylation reactions?
(A). Â Arylketone
(B). Â Alkylamine
(C). Â Alkylbenzene
(D). Â Halobenzene
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following is The reaction in which benzene reacts with alkyl halide in the presence of a lewis acid as a catalyst to produce alkylbenzene?
(A). Â Nitration
(B). Â Friedel-Crafts Alkylation
(C). Â Friedel-Crafts Acylation
(D). Â Halogenation
(E). None of these
Multiple Choice Question Answer:Â b
The meta directing group is _______
(A).  –NHCOCH3
(B).  –OCH3
(C).  –OH
(D).  –COOH
(E). None of these
Multiple Choice Question Answer:Â d
Which of the following is The most stable carbonium ion?
(A). Â Methyl carbonium ion
(B). Â Â 30 carbonium ion
(C). Â 10 carbonium ion
(D). Â 20 carbonium ion
(E). None of these
Multiple Choice Question Answer:Â b
Convert the benzene into n-propyl benzene
(A). Â Friedel-Crafts Alkylation
(B). Â Friedel-Crafts Acylation followed by clemmensen reduction
(C). Â Friedel-Crafts Alkylation followed by clemmensen reduction
(D). Friedel-Crafts Acylation
(E). None of these
Multiple Choice Question Answer: Â b
The ortho-para directing group is ___________
(A).  –CN
(B).  –NO2
(C).   –NHCOCH3
(D).  –CHO
(E). None of these
Multiple Choice Question Answer: Â c
Fuming sulphuric acid is the solution of how much % SO3 in conc. H2SO4?
(A). Â 7
(B). Â 9
(C). Â 8
(D). Â 10
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following is The compound that can be most readily sulphonated?
(A). Â Toluene
(B). Â Nitrobenzene
(C). Â Benzene
(D). Â Chlorobenzene
(E). None of these
Multiple Choice Question Answer: Â a