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Why zinc oxide which is white …

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Why zinc oxide which is white in color does become yellow heating?

    • Posted by Priyanka Choudhary 8 years ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Virendra Aditya 8 years ago

    ZnO turns yellow on heating due to non stoichiometric defact i.e. metal excess defact. This defact is caused by extra cations in the interstitial site . On heating oxygen escapes the lattice leaving behind the electron which give ZnO YELLOW COLOUR

    1Thank You

    Nisha Beniwal 8 years ago

    Due to the presence of f-centre

    0Thank You

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