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ZnO is white when cold and …

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ZnO is white when cold and yellow when heated.why??

Posted by Satyam Singh Gurjar 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Suparna Bhattacharjee 7 years, 3 months ago

Zinc oxide which is white in colour on heating it loses oxygen an turns yellow. Due to the excess 9f zinc ions in the crystal its formula becomes zn1+xO. Thule excess zn2+ions move to interstitial site and electrons to neighboring intersititial sites..

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