AIIMS AIIMS Solved Paper-2010

  • question_answer
    Catalyst used in dimerisation of acetylene to prepare chloropropene is

    A) \[HgS{{O}_{4}}+{{H}_{2}}S{{O}_{4}}\]

    B) \[C{{u}_{2}}C{{l}_{2}}\]

    C) \[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}OH\]

    D) \[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}Cl\]

    Correct Answer: D

    Solution :

    \[\underset{acetylene}{\mathop{2CH\equiv CH}}\,\xrightarrow{C{{u}_{2}}C{{l}_{2}},N{{H}_{4}}Cl}\underset{monovinyl\,acetylene}{\mathop{CH\equiv C-CH=C{{H}_{2}}}}\,\] \[\xrightarrow{HCl,\,C{{u}^{2+}}}\underset{chloroprene}{\mathop{C{{H}_{2}}=\overset{Cl}{\mathop{\overset{|}{\mathop{C}}\,}}\,-CH=C{{H}_{2}}}}\,\]


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