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NEET Chemistry Structure of Atom / परमाणु संरचना NEET PYQ-Structure of Atom

  • question_answer
    Among    die    following    groupings   which represents    the    collection    of   isoelectronic species?    [AIPMT 2000]

    A)  \[NO,\,C{{N}^{-}},\,{{N}_{2}},\,O_{2}^{-}\]

    B)       \[N{{O}^{+}},\,C_{2}^{2-},\,O_{2}^{-},\,CO\]

    C)  \[{{N}_{2}},\,C_{2}^{2-},\,CO,\,NO\]

    D)       \[CO,\,N{{O}^{+}},\,C{{N}^{-}},\,C_{2}^{2-}\]

    Correct Answer: D

    Solution :

    Species having equal number of electrons are known as isoelectronic species.
                In CO number of In \[N{{O}^{+}}\] number of
                electrons                        electrons
                \[=6+8=14\]                 \[=7+8-1=14\]
                In \[C{{N}^{-}}\] number of      In \[C_{2}^{2-}\] number of
                electrons                        electrons
                \[=6+7+1=14\]            \[=12+2=14\]
                Hence, all have 14 electrons so, they are isoelectronic species.


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