RAJASTHAN PMT Rajasthan - PMT Solved Paper-2005

  • question_answer
    The number of a and K bonds present in\[CH\equiv C-C{{H}_{2}}-CH=C{{H}_{2}}\]is:

    A) \[10\sigma 3\pi \]                           

    B) \[11\sigma 2\pi \]

    C) \[9\sigma 3\pi \]              

    D)        \[10\sigma 2\pi \]

    Correct Answer: A

    Solution :

    \[H\overline{\sigma }C\underset{\pi }{\overset{\pi }{\mathop{\equiv }}}\,C\overset{\sigma }{\mathop{\_}}\,\underset{\begin{smallmatrix}  |\sigma  \\  C \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  \sigma | \end{smallmatrix}}{\mathop{C}}}\,\overset{\sigma }{\mathop{-}}\,\underset{{}}{\overset{\begin{smallmatrix}  H \\  |\sigma  \end{smallmatrix}}{\mathop{C}}}\,\underset{\pi }{\overset{\sigma }{\mathop{=}}}\,\underset{{}}{\overset{\begin{smallmatrix}  H \\  \sigma | \end{smallmatrix}}{\mathop{C}}}\,\overline{\sigma }H\] Therefore, \[10\sigma \] and \[3\pi \] bonds are present


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