NEET Sample Paper NEET Sample Test Paper-39

  • question_answer ) Which of the following species contains equal number of\[\sigma -\]and\[\pi -\]bonds?

    A) \[{{(CN)}_{2}}\]

    B) \[C{{H}_{2}}{{(CN)}_{2}}\]

    C)  \[HCO_{3}^{-}\]

    D) \[Xe{{O}_{4}}\]

    Correct Answer: D

    Solution :

    \[C{{H}_{2}}{{(CN)}_{2}}\,\,\,\,\,\,N\equiv C-\underset{H}{\overset{N}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-C\equiv N(6\sigma +4\pi )\] \[{{(CN)}_{2}}\,\,\,\,\,\,N\equiv C-C=N(3\sigma +4\pi )\]

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