Organic Chemistry Reactions Quiz
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Questions and Answers

Which reagent can be used to reduce aldehydes and ketones to alcohols?

  • NaBH4 (correct)
  • Grignard reagents
  • LAIH4
  • Concentrated alkali
  • What reaction do aldehydes without alpha-hydrogens undergo in the presence of concentrated alkali?

  • Aldol condensation
  • Cannizzaro reaction (correct)
  • Wolff-Kishner reduction
  • Grignard reaction
  • How are carboxylic acids prepared from Grignard reagents?

  • By Clemmensen reduction
  • By oxidation with Tollens' reagent
  • By treatment with carbon dioxide (correct)
  • By hydrolysis of nitriles
  • Which reagent can be used to distinguish aldehydes from ketones based on oxidation reactions?

    <p>Tollens' reagent</p> Signup and view all the answers

    What type of reaction leads to the formation of a-hydroxyaldehydes and a-hydroxyketones?

    <p>Aldol condensation</p> Signup and view all the answers

    What is the general name for the reaction that forms a-hydroxyaldehydes and a-hydroxyketones?

    <p>Aldol condensation</p> Signup and view all the answers

    What reaction do aldehydes without alpha-hydrogens undergo in the presence of concentrated alkali?

    <p>Cannizzaro reaction</p> Signup and view all the answers

    How can the carbonyl group of aldehydes and ketones be reduced to a methylene group?

    <p>By Clemmensen reduction or Wolff-Kishner reduction</p> Signup and view all the answers

    What are the mild oxidizing reagents used to oxidize aldehydes to carboxylic acids?

    <p>Tollens' reagent and Fehling's reagent</p> Signup and view all the answers

    What is the general name for the reagents used to reduce aldehydes and ketones to alcohols?

    <p>NaBH4, LAH, or catalytic hydrogenation</p> Signup and view all the answers

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