3rd semester Internal Exam 2020-21 Compl1

Electrophile of nitration of benzene is

• NO2+

• NO2-

• NO2

• HNO3

Benzene is characterized by

• Addition reaction

• Rearrangement reaction

• Electrophilic substitution reaction

• Nucleophilic substitution reaction

C₆H₆ + CH3Cl in the presence of AlCl₃ gives

• 
• 
• 
• 

Electrophile is

• an electron rich species

• electron deficient species

• Free Radical

• None of the above

Which of the following is a benzenoid compound?

• Naphthalene

• Pyridine

• Indole

Which is a meta director

• Alkyl group

• halogens

• Nitro group

• OH group

Huckle number of pyridine is

• 8

• 6

• 10

• 2

In Friedel Craft's acylation reaction

• Halogen is introduced to benzene

• RCO group is introduced to benzene

• NO₂ group is introduced to benzene

• SO₃H group is introduced to benzene

The intermediate formed during electrophilic substitution reaction of benzene

• Arenium ion

• phenyl ion

• Benzene anion

• methyl cation

The reagent and catalyst used for Friedel Craft's alkylation of benzene respectively are

• RCl, HCl

• RCl, AlCl₃

• AlCl₃, HCl

• AlCl₃, RCl