Arenes

Nitration of a benzene molecule shows reaction of

• electrophilic substitution

• addition reaction

• nucleophillic substitution

• all of them

The presence of benzene (C₆H₆) ring in an alkylarene can affect the characteristic reactions of its

• alkyl-side chain

• beta chain

• alpha chain

• all of them

Arenes are polar. State true or false

a) True

b) False

• True

• False

Which statement about the reaction of benzene with Cl₂ in the presence of AlCl₃ is incorrect?

• Chlorobenzene is formed

• AlCl₃ is a catalyst

• The mechanism goes via an intermediate cation

• The mechanism is electrophilic addition

Which one of the following describes the mechanism of the reaction of aqueous NaOH with 2,4,6-trinitrochlorobenzene to form picric acid

• nucleophilic substitution

• electrophilic addition

• addition and elimination

• electrophilic substitution

The reaction of benzene with Methyl chloride under Friedel-Crafts conditions leads to which of the following?

• Methylbenzene and 1,2-dimethylbenzene as the only products

• A mixture of methylbenzene, 1,2-dimethylbenzene and 1,4-dimethylbenzene

• 1,2-Dimethylbenzene and 1,4-dimethylbenzene as the only products

• Methylbenzene (toluene) as the only product

Which statement about benzene is incorrect?

• The C₆ ring is planar

• Each C atom is sp² hybridized

• The C–C π-bonding is delocalized

• The reactivity of the benzene reflects the presence of carbon-carbon double bonds

Which statement about the reaction of benzene with 1-chloropropane in the presence of AlCl₃ is incorrect?

• AlCl₃ acts as a catalyst

• Benzene undergoes electrophilic substitution

• In the presence of AlCl₃, 1-chloropropane reacts to give a carbenium ion

• The major product is n-propylbenzene

• A

• B

• C

• D

With respect to the electrophilic aromatic substitution of benzene which of the following is not true?

• A non-aromatic intermediate is formed

• Benzene acts as an electrophile

• A proton is lost in the final step

• Resonance forms are important