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JEE Main & Advanced Chemistry The Solid State / ठोस प्रावस्था Question Bank Defects in Crystal

  • question_answer
    The flame colours of metal ions are due to           [KCET 2003]

    A)                 Frenkel defect 

    B)                 Schottky defect

    C)                 Metal deficiency defect               

    D)                 Metal excess defect

    Correct Answer: D

    Solution :

              In metal excess defect when holes created by missing of anions are occupied by electrons, there sites are called F-centres and are responsible for colour in the crystal.


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