RAJASTHAN PMT Rajasthan - PMT Solved Paper-1998

  • question_answer
    Which of the following react with acetylene and formed dichloroacetaldehyde?

    A)  \[HOCl\]                             

    B)                         \[HCl\]

    C)                         Both (a) and (b)

    D)                         None of these

    Correct Answer: A

    Solution :

    \[\underset{Acetylene}{\mathop{HC\equiv CH}}\,+HOCl\xrightarrow{{}}H\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,=CH-Cl\] \[\underset{Unstable}{\mathop{\xrightarrow{HOCl}\left[ HO-\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-Cl \right]\xrightarrow{-{{H}_{2}}O}}}\,\]                 \[\underset{Dichloro\text{ }acetaldehydn}{\mathop{\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,H-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-Cl}}\,\]


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