Solid StateMedium
Question
Zinc Oxide, white in colour at room temperature, acquires yellow colour on heating due to:
Options
A.Zn being a transition element
B.paramagnetic nature of the compound
C.trapping of electrons at the site vacated by Oxide ions
D.Both (A) & (B)
Solution
Some of O2- combine with each other forming O2 gas which is liberated leaving behind electrons at the site vacated by oxide ions.
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