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CMC Medical CMC-Medical Ludhiana Solved Paper-2015

  • question_answer
    Which of the following is a pair of isoelectronic species?

    A)  \[C{{l}_{2}}{{O}_{3}},\,ICl_{2}^{-}\]                        

    B)  \[ICl_{2}^{-},\,Cl{{O}_{2}}\]

    C)  \[IF_{2}^{+},\,I_{3}^{-}\]                            

    D)  \[ClO_{2}^{-},\,ClF_{2}^{+}\]

    Correct Answer: D

    Solution :

                    Number of electrons in\[ClO_{2}^{-}=17+16+1=34\] Number of electron in electrons in \[ClF_{2}^{+}\] \[=17+18-1\] \[=34\] Hence, \[ClO_{2}^{-},\]and \[ClF_{2}^{+}\]is a pair of isoelectronic species.


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