NEET Sample Paper NEET Sample Test Paper-75

  • question_answer
    Which of the following pair is iso electronics?

    A)  \[{{\operatorname{CO}}_{2}} and N{{O}_{2}}\]          

    B)  \[{{\operatorname{BF}}_{3}}\,\,and N{{N}_{3}}\]

    C)  \[NO_{3}^{-}\,\,and CC{{l}_{4}}\]     

    D)  \[NO_{{}}^{+}\,\,and Sb{{H}_{5}}\]

    Correct Answer: D

    Solution :

    Species having same total number of valence electrons are isoelectronics with each other. Total valence electrons in \[N{{O}^{+}}=\frac{5+6-1}{2}=10\] Total valence electrons in \[Sb{{H}_{5}}=5+5=10\]


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