Quiz  /  Benzene Class 12 MCQ Questions With Answers

  • 1. 
    What is the accepted current view of the model for bonding in benzene?

  • Delocalised model
  • Kekule structure
  • Resonance structure
  • Arrhenius structure

  • 2. 
    How was the current accepted structure of benzene discovered?

  • NMR
  • Staring at it intently under an electron microscope
  • X-ray diffraction
  • Edexcel discovered it

  • 3. 
    Which of these are not evidence for the delocalised model?

  • X-ray crystallography shows all bonds are same length
  • Benzene is resistant to bromination
  • Enthalpy of hydrogenation shows it is less than expected
  • Enthalpy of hydrogenation shows it is  more than expected

  • 4. 
    Does benzene decolorise bromine?

  • Yes
  • NO
  • Who knows
  • Why did i take chemistry in the first place?

  • 5. 
    What is true about C-C bond lengths in benzene?

  • alternative longer and shorter length
  • All the same length
  • All different length
  • two are the same length and the third one is different

  • 6. 
    Which of these best describes the bonding in 60 characters or less?

  • the p-orbitals overlap to make a pi- bond
  • the electrons are delocalised ring
  • p-orbitals ovelap above and below plane and form 2 delocalised rings
  • p-orbitals ovelap above and below plane and form a delocalised ring

  • 7. 
    How many delocalised electron are there for each benzene molecules?

  • 2
  • 3
  • 6
  • 12

  • 8. 
    What is the other name of hydrocarbon?

  • Alkenes
  • Alkynes
  • Arenes
  • Alkanes

  • 9. 
    What is the resonance energy of Benzene?

  • 151 KJ mol-1
  • 152 KJ mol-1
  • 153 KJ mol-1
  • 154 KJ mol-1

  • 10. 
    How did Kakule try to account for the initial problems with his original benzene structure?

  • Told his critics to deal with it
  • Crouched in a corner and cry
  • Proposed an equilibrium model
  • Made a new model with international bond length

  • 11. 
    Which mechanism an aromatic compounds react by?

  • Electrophilic addition
  • Electrophilic substitution
  • Nucleophilic addition
  • Nucleophilic substitution

  • 12. 
    Alcohol can be produced by the following methods except

  • fermentation of glucose
  • catalytic addition of steam to ethene
  • cracking of long chain hydrocarbon

  • 13. 
    What organic product is formed when benzene reacts with nitric acid in the presence of concentrated sulfuric acid?

  • a
  • b
  • c
  • d

  • 14. 
    What is the organic product of the following reaction?

  • A
  • B
  • C
  • D

  • 15. 
    What is produced when benzene reacts with chlorine in the presence of an iron catalyst?

  • only chlorobenzene
  • chlorobenzene and chlorine atoms
  • chlorobenzene and hydrogen chloride
  • chlorobenzene and water

  • 16. 
    Which of the following transformations could be feasibly carried out in a single step using the Friedel–Crafts alkylation?

  • A
  • B
  • C
  • D

  • 17. 
    Which functional groups are present in C6H5CONHCH3?

  • carboxamide and benzene ring
  • amine, benzene ring and carbonyl
  • benzene ring and carbonyl
  • amine and benzene ring
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