Aldehydes Preparation and Properties
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Questions and Answers

What is the product formed when an aldehyde or ketone is reduced to a primary alcohol?

  • Alcohol (correct)
  • Hydrazone
  • Oxime
  • Imine
  • Which reagent is used in the Gatterman-Koch reaction for the preparation of aldehydes and ketones?

  • Zincamalgam
  • Sodium borohydride
  • Chromic oxide (correct)
  • Hydroxylamine
  • What is the product obtained from the reduction of a ketone to a secondary alcohol?

  • Hydrazone
  • Imine
  • Oxime
  • Alcohol (correct)
  • In the Wolff-Kishner reduction, what is the high boiling solvent used for the reduction of a carbonyl group to a CH2 group?

    <p>Ethylene glycol</p> Signup and view all the answers

    Which method involves the preparation of aldehydes and ketones from acyl chlorides?

    <p>Gatterman-Koch reaction</p> Signup and view all the answers

    What is the product formed when an aldehyde reacts with ammonia?

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

    How are aromatic aldehydes prepared using chromyl chloride or CrO3?

    <p>Oxidation of methylbenzene</p> Signup and view all the answers

    Which method is used for the preparation of aromatic ketones?

    <p>Friedel-Crafts acylation of aromatic hydrocarbons with acyl chlorides</p> Signup and view all the answers

    How are ketones prepared from nitriles?

    <p>Reaction with acyl chlorides</p> Signup and view all the answers

    What is the method for preparing aldehydes from acyl halides?

    <p>Selective reduction</p> Signup and view all the answers

    Which reaction is involved in the Gatterman-Koch reaction?

    <p>Chlorination followed by hydrolysis</p> Signup and view all the answers

    How are ketones prepared from acyl chlorides and anhydrides?

    <p>Friedel-Crafts acylation of aromatic hydrocarbons</p> Signup and view all the answers

    Which method is suitable for preparing aldehydes and ketones from volatile alcohols?

    <p>Dehydrogenation of alcohols</p> Signup and view all the answers

    Which method involves passing alcohol vapors over heavy metal catalysts to produce aldehydes and ketones?

    <p>Dehydrogenation of alcohols</p> Signup and view all the answers

    In the Gatterman-Koch reaction, what is the role of CO and HCl?

    <p>CO acts as an oxidizing agent and HCl as a reducing agent</p> Signup and view all the answers

    Which method involves the use of acyl chlorides to prepare ketones?

    <p>Gatterman-Koch reaction</p> Signup and view all the answers

    How are ketones prepared from nitriles?

    <p>By Gatterman-Koch reaction</p> Signup and view all the answers

    Which method involves the oxidation of primary and secondary alcohols to prepare aldehydes and ketones, respectively?

    <p>Dehydrogenation of alcohols</p> Signup and view all the answers

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