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  4. The yellow colour of ZnO and conducting nature produced upon heating is due to

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Q. The yellow colour of $ZnO$ and conducting nature produced upon heating is due to

The Solid State

Solution:

ZnO shows yellow colour of heating due to F-centre
$ZnO \longrightarrow Zn ^{2+}+2 e^{-}+\frac{1}{2} O _{2}$
Electron get trapped in anion sites. This is called as F-centre. Due to F-centre colour of many compounds occurs.