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JEE Main & Advanced AIEEE Solved Paper-2004

  • question_answer
    What type of crystal defect is indicated in the diagram below?\[N{{a}^{+}},C{{l}^{-}},N{{a}^{+}},C{{l}^{-}},N{{a}^{+}},C{{l}^{-}}\] \[C{{l}^{-}}+C{{l}^{-}}N{{a}^{+}}+N{{a}^{+}}\]\[N{{a}^{+}}C{{l}^{-}}+C{{l}^{-}}N{{a}^{+}}C{{l}^{-}}\]\[C{{l}^{-}}N{{a}^{+}}C{{l}^{-}}N{{a}^{+}}+N{{a}^{+}}\]

    A) Frenkel defect

    B) Schottky defect

    C) Interstitial defect

    D) Frenkel and Schottky defects

    Correct Answer: B

    Solution :

    When equal number of cations and anions (such that charges are equal) are missing \[(1N{{a}^{+}},1C{{l}^{-}}/1F{{e}^{2+}},2C{{l}^{-}})\] It is a case of Schottky defect.


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