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Aldehydes And Ketones Test - 26

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Aldehydes And Ketones Test - 26
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Weekly Quiz Competition
  • Question 1
    1 / -0

    End product of the following sequence of reaction is

    Solution

     

  • Question 2
    1 / -0

    The reagent used for the separation of acetaldehyde from acetophenone is

    Solution

    Acetaldehyde being aliphatic carbonyl compound forms adduct with NaHSO3 which one heating with dil. mineral acid gives back acetaldehyde whereas acetophenone does not give such reaction

     

  • Question 3
    1 / -0

    Ketones are prepared by

    Solution

    Oppenaur's oxidation is used to prepare Ketone.

     

  • Question 4
    1 / -0

    Solution

    In presence of dry HCl, two molecules of acetone undergo aldol condensation reaction to form mesityl oxide.

     

  • Question 5
    1 / -0

    When m-chlorobenzaldehyde is treated with 50%KOH solution, the product(s) obtained is (are)

    Solution

    Due to the absence of α-hydrogen it gives Cannizaro reaction. One is oxidised product and another is reduced product.

     

  • Question 6
    1 / -0

    Ketones [RCOR1] where R = R1 = alkyl group. It can be obtained in one step by

    Solution

    A tertiary alcohol is difficult to oxidise. But when it is treated with an acidic oxidising agent under some conditions, it is oxidised to ketone and then to acids. Both the ketone and acid contain the lesser number of carbon atoms than the starting alcohol.

     

  • Question 7
    1 / -0

    The structure of compound B is

    Solution

     

  • Question 8
    1 / -0

    Which of the following compounds containing carbonyl group will give coloured crystalline compound with

    Solution

    Only aldehyde and ketones react with 2,4-dinitrophenyl hydrazine (DNP) to produce characteristic red or orange colour solution

     

  • Question 9
    1 / -0

    Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?

    Solution

    Benzaldehyde will undergo Cannizzaro reaction on treatment with 50% NaOH to produce benzyl alcohol and benzoic acid as it does not contain α - hydrogen.

     

  • Question 10
    1 / -0

    On heating calcium acetate and calcium formate, the product formed is

    Solution

     

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