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

Question

The yellow colour of ZnO and conducting nature produced upon heating is due to (A) metal excess defects due to interstitial cation (B) extra positive ions present in an interstitial site (C) trapped electrons (D) all of these.

Tardigrade Admin · Accepted Answer

ZnO shows yellow colour of heating due to F-centre

Z n O ⟶ Z n^{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.

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

metal excess defects due to interstitial cation

extra positive ions present in an interstitial site

trapped electrons

all of these.

ZnO shows yellow colour of heating due to F-centre ZnO⟶Zn2++2e−+21​O2​ Electron get trapped in anion sites. This is called as F-centre. Due to F-centre colour of many compounds occurs.

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

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