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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Atomic number, Mass number Atomic species

  • question_answer
    An isostere is                                     [UPSEAT 1999]

    A)                 \[NO_{2}^{-}\] and \[{{O}_{3}}\]              

    B)                 \[NO_{2}^{-}\] and \[PO_{4}^{3-}\]

    C)                 \[C{{O}_{2}},\,{{N}_{2}}O,\,NO_{3}^{-}\]             

    D)                 \[ClO_{4}^{-}\] and \[OC{{N}^{-}}\]

    Correct Answer: A

    Solution :

                    \[NO_{2}^{-}\] and \[{{O}_{3}}\] are isostere. The number of atoms in these \[(=3)\] and number of electrons \[(24)\] are same.


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