2. Sample Papers
  3. JEE Main & Advanced
  4. Chemistry
  5. The Solid State / ठोस प्रावस्था

JEE Main & Advanced Chemistry The Solid State / ठोस प्रावस्था Sample Paper Topic Test - Solid State

  • question_answer
    \[ZnO\] is white when cold and yellow when heated. It is due to the development of

    A) Frenkel defect                

    B) Schottky defect

    C) Metal excess defect                     

    D) Metal deficiency defect

    Correct Answer: C

    Solution :

    [c] \[ZnO\xrightarrow{\Delta }Z{{n}^{2+}}+\frac{1}{2}{{O}_{2}}+2{{e}^{-}}\]
    The remaining \[Z{{n}^{2+}}\] ions occupy the interstitial voids of remaining crystal, thus causing metal excess defect.


You need to login to perform this action.
You will be redirected in 3 sec spinner