NEET AIPMT SOLVED PAPER SCREENING 2007

  • question_answer
                    \[C{{H}_{3}}-CHCl-C{{H}_{2}}-C{{H}_{3}}\] has a chiral centre. Which one of the following represents its R configuration?

    A)                                                                                                                                                                                            \[\begin{align}   & \,\,\,\,\,\,\,\,\,\,\,\,\,\,{{C}_{2}}{{H}_{5}} \\  & {{H}_{3}}C-\overset{|}{\mathop{\underset{|}{\mathop{C}}\,}}\,-Cl \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,H \\ \end{align}\]                     

    B)                 \[H-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\overset{\begin{smallmatrix}  {{C}_{2}}{{H}_{5}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}\]

    C)                 \[\begin{align}   & \,\,\,\,\,\,\,\,{{C}_{2}}{{H}_{5}} \\  & Cl-\overset{|}{\mathop{\underset{|}{\mathop{C}}\,}}\,-C{{H}_{3}} \\  & \,\,\,\,\,\,\,\,\,\,H \\ \end{align}\]                     

    D)                 \[\begin{align}   & \,\,\,\,\,\,\,\,C{{H}_{3}} \\  & H-\overset{|}{\mathop{\underset{|}{\mathop{C}}\,}}\,-Cl \\  & \,\,\,\,\,\,\,\,\,{{C}_{2}}{{H}_{5}} \\ \end{align}\]

    Correct Answer: A

    Solution :

                    \[C{{H}_{3}}-CHCl-C{{H}_{2}}-C{{H}_{3}}\]                 Priority order is                                                                      


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