Class 12 CBSE Chemistry Handwritten Notes Quiz
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Questions and Answers

Which of the following is true about haloalkanes and haloarenes?

  • Haloarenes are classified based on the hybridization of the halogen atom
  • Haloalkanes contain aryl groups but no alkyl groups
  • Haloalkanes are derivatives of aliphatic hydrocarbons containing halogen atom
  • Haloarenes are derivatives of aromatic hydrocarbons containing halogen atom (correct)

    • What is the basis of classification for dihaloarenes and monohaloarenes?

  • Based on the number of halogen atoms attached to the carbon atom
  • Based on the position of halogen atoms in the aromatic ring (correct)
  • Based on the hybridization of the carbon atom
  • Based on the molecular weight of the compound

    • What is true about allylic halides?

  • The halogen is bonded to a sp² hybridized carbon atom (correct)
  • Allylic halides contain no alkyl groups
  • The halogen is bonded to an sp³ hybridized carbon atom
  • The allylic carbon atom is always bonded to an aromatic ring

    • How are mono haloalkanes and mono haloarenes different?

    <p>Mono haloalkanes contain alkyl groups, while mono haloarenes contain aryl groups</p> Signup and view all the answers

    What is true about the hybridization of carbon in halo alkanes and halo arenes?

    <p>Halo alkanes have sp³ hybridized carbon, while halo arenes have sp² hybridized carbon</p> Signup and view all the answers

    Which method is commonly used for the preparation of ethers?

    <p>Williamson synthesis</p> Signup and view all the answers

    What are the chemical properties associated with phenols?

    <p>Acidic nature</p> Signup and view all the answers

    In which compound can resonance be observed?

    <p>Anisole</p> Signup and view all the answers

    Study Notes

    Haloalkanes and Haloarenes

    • Haloalkanes are organic compounds containing carbon, hydrogen, and halogen atoms, while haloarenes are derived from aromatic compounds with a halogen substituent.
    • Classification is based on the number of halogen atoms: monohaloarenes have one halogen atom, while dihaloarenes have two.

    Allylic Halides

    • Allylic halides possess a halogen atom bonded to a carbon atom adjacent to a carbon-carbon double bond, leading to unique reactivity patterns.

    Differences between Haloalkanes and Haloarenes

    • Mono haloalkanes typically exhibit sp³ hybridization at the carbon atom bonded to the halogen, while mono haloarenes display sp² hybridization at that position.

    Hybridization in Haloalkanes and Haloarenes

    • In haloalkanes, the halogen is attached to a tetrahedral carbon (sp³ hybridized), whereas in haloarenes, the halogen is connected to a planar carbon in an aromatic ring (sp² hybridized).

    Preparation of Ethers

    • Ethers are commonly prepared by the Williamson ether synthesis, which involves the reaction of an alkoxide ion with a primary alkyl halide.

    Chemical Properties of Phenols

    • Phenols exhibit acidic properties due to the resonance stabilization of their conjugate base; they can undergo electrophilic substitution and oxidation reactions.

    Resonance in Compounds

    • Resonance can be observed in compounds containing delocalized pi electrons, such as phenols and aromatic systems, providing stability and influencing reactivity.

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    Description

    Test your knowledge of Haloalkanes and Haloarenes with these handwritten notes for the 2023 CBSE exam. Covering topics such as introduction, classification and derivatives of aliphatic hydrocarbons containing halogen atoms.

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