JEE Main & Advanced Chemistry Aldehydes, Ketones Question Bank Properties

  • question_answer
    \[A\xrightarrow{{}}{{(C{{H}_{3}})}_{2}}C=CHCOC{{H}_{3}}A\] is                     [MHCET 2004]

    A)                 Acetone              

    B)                 Acetaldehyde

    C)                 Propionaldehyde            

    D)                 Formaldehyde

    Correct Answer: A

    Solution :

               Two molecules of acetone condense in presence of dry HCl gas to form mesityl oxide.                    \[\begin{matrix}    C{{H}_{3}}  \\    C{{H}_{3}}  \\ \end{matrix}>C=O+{{H}_{2}}-CH-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\underset{-{{H}_{2}}O}{\mathop{\xrightarrow{HCl}}}\,\]                                 \[{{(C{{H}_{3}})}_{2}}\underset{\text{Mesityl oxide}}{\mathop{C=CH.COC{{H}_{3}}}}\,\]


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