NEET AIPMT SOLVED PAPER SCREENING 2007

  • question_answer
                    Predict the product C obtained in the following reaction of butyne-1.                                                     \[C{{H}_{3}}C{{H}_{2}}-C\equiv CH+HCl\xrightarrow[{}]{{}}B\xrightarrow[{}]{HI}C\]

    A)                 \[\begin{align}   & C{{H}_{3}}-\underset{|}{\mathop{C}}\,H-C{{H}_{2}}C{{H}_{2}}I \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl \\ \end{align}\]                                     

    B)                 \[\begin{align}   & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,I \\  & C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,-H \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl \\ \end{align}\]

    C)                 \[\begin{align}   & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,I \\  & C{{H}_{3}}-C{{H}_{2}}-\overset{|}{\mathop{C}}\,H-C{{H}_{2}}Cl \\ \end{align}\]                     

    D)                 \[\begin{align}   & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,I \\  & C{{H}_{3}}C{{H}_{2}}-\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,-C{{H}_{3}} \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl \\ \end{align}\]

    Correct Answer: D

    Solution :

                    \[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH+HCl\xrightarrow[{}]{{}}\]                 \[\begin{align}   & C{{H}_{3}}-C{{H}_{2}}-\underset{|}{\mathop{C}}\,=C{{H}_{2}}\xrightarrow[{}]{HI} \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl \\ \end{align}\]                 \[\underset{2-chloro,\,2-ido\,bu\tan e}{\mathop{\begin{align}   & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,I \\  & C{{H}_{3}}-C{{H}_{2}}-\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,-C{{H}_{3}} \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl \\ \end{align}}}\,\]


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