WorksheetsSK025 Chapter 6: Benzene Ring
Total questions: 10
Worksheet time: 5mins
Nitronium ion, NO2+, attacks the electrons of the aromatic ring of benzene. Name the type of reaction involved.
A. Free radical substitution
B. Electrophilic aromatic substitution
C. Nucleophilic aromatic substitution
D. Electrophilic aromatic addition
Which of the following is FALSE about ethene and benzene?
A. Both are planar molecules
B. Both are non-polar molecules
C. Both exhibit sp2 hybridisation
D. Both have the same C:H ratio
Which of the following reagent does not react with benzene?
A. Concentrated H2SO4
B. HNO3/ H2SO4
C. Iodoehane in the presence of iron
D. Sodium hydroxide solution
Which of the following will produce chlorobenzene when chlorine was passed through it?
A. Iodobenzene at 20⁰C
B. Bromobenzene in the presence of iron
C. Benzene in the presence of iron
D. Benzene in the presence of light
Nitrobenzene can be prepared by reacting benzene with a mixture of concentrated sulphuric acid and concentrated nitric acid.
Which of the following statement best describes the role of concentrated sulphuric acid
A. To get rid of water molecules
B. To form an unstable complex with benzene
C. To protonate nitric acid
D. To act as solvent
The species that attacks the benzene molecule in the nitration of benzene using a mixture of concentrated sulphuric acid and concentrated nitric acid is
A. ⋅NO2
B. NO2+
C. HNO3
D. NO3 -
Which of the reagents below does NOT react with methylbenzene?
A. Bromine gas/iron catalyst
B. Aqueous bromine in catalyst
C. Acidified potassium manganite (VII)
D. Dilute sulphuric acid
Which of the following is FALSE about the property of benzene molecule?
A. It is a planar molecule.
B. It is stabilised by delocalisation of ℼ electrons.
C. Each carbon atom undergoes sp hybridisation.
D. Its typical reaction is electrophilic substitution.
The only compound that will yield benzoic acid when reacted with acidified potassium dichromate (VI) solution is
A. CH2=CH2
B. C6H5C(CH3)3
C. C6H5CH(CH2CH3)2
D. Cyclohexane
Which of the statement is TRUE about electrophilic aromatic substitution?
A. Substitution of hydrogen atom in methane by chlorine atom
B. Substitution of hydrogen atom in benzene by NO2+
C. Substitution of chlorine atom in ethanoyl chloride by CH3O-
D. Substitution of -OH in ethanol by CI-
