Cards (29)

    • August Kekulé proposed that benzene has a cyclic structure with alternating single and double bonds
    • What is unique about the carbon-carbon bond lengths in benzene?
      All bond lengths are equal
    • Michael Faraday's discovery of benzene marked the initial identification of this organic compound.

      True
    • Kekulé's model accurately explains benzene's resistance to addition reactions.
      False
    • In benzene, all six carbon-carbon bonds are equal in length
    • The unhybridized p orbitals in benzene form a delocalized π electron system.

      True
    • What is the approximate length of each carbon-carbon bond in benzene?
      1.39 Å
    • August Kekulé proposed that benzene has a cyclic structure with alternating single and double bonds
    • Match the person with their discovery related to benzene:
      Michael Faraday ↔️ Isolated benzene
      August Kekulé ↔️ Proposed cyclic structure
    • In benzene, all six carbon-carbon bonds are equal in length, unlike Kekulé's prediction.

      True
    • What is the major difference between Kekulé's model and the actual bond lengths in benzene?
      Equal bond lengths
    • What type of hybridization does each carbon atom in benzene undergo?
      sp² hybridization
    • What type of bonds are formed by the sp² hybrid orbitals in benzene?
      σ bonds
    • The delocalized π electrons in benzene contribute to its high stability and resistance to addition reactions.

      True
    • Match the compound with its stability and reactivity:
      Benzene ↔️ High stability, low reactivity
      Alkene ↔️ Low stability, high reactivity
    • Who was the first person to isolate benzene from illuminating gas?
      Michael Faraday
    • Benzene readily undergoes addition reactions like alkenes.
      False
    • Benzene is stable and resists addition reactions
    • What fundamental concept about benzene did August Kekulé propose in 1865?
      Cyclic structure with alternating bonds
    • What type of hybridization do carbon atoms undergo in benzene according to the modern understanding?
      sp²
    • The delocalized π electron system in benzene makes it stable and resistant to addition reactions
    • Who was the first to isolate benzene from illuminating gas?
      Michael Faraday
    • Kekulé's cyclic structure of benzene laid the foundation for its modern understanding.

      True
    • What type of reactions does benzene resist that alkenes undergo easily?
      Addition reactions
    • Benzene resists addition reactions, whereas alkenes undergo them easily
    • Benzene is cyclic with delocalized π electrons.
    • In benzene, the unhybridized p orbitals overlap to form a delocalized π electron system.

      True
    • The delocalized π electron system in benzene ensures all carbon-carbon bonds have equal lengths.
    • What is the primary reason for benzene's stability?
      Aromaticity