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NEET Sample Paper NEET Sample Test Paper-72

  • question_answer
    The correct order of increasing \[\operatorname{C} - O\] bond, length of \[\operatorname{CO}, CO_{3}^{2-},\,\,C{{O}_{2}}\] is

    A) \[CO_{3}^{2-}<C{{O}_{2}}<CO\]

    B) \[CO_{2}^{{}}<CO_{3}^{2-}<CO\]

    C) \[CO<CO_{3}^{2-}<C{{O}_{2}}\]

    D) \[CO<CO_{2}^{{}}<CO_{3}^{2-}\]

    Correct Answer: D

    Solution :

    B.O. in CO, i.e.,: \[C=O\]: is 3, that of \[\operatorname{O}=C=O\] is 2 while that of \[C{{O}^{2-}}_{3}\] ion is 1.33. Since the bond length increases as the bond order decreases, i.e., \[\operatorname{CO} < C{{O}_{2}} < C{{O}^{2-}}_{3}\]. Thus option is correct.


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