AP EAMCET · Chemistry · Solid State
Zinc oxide (white) is heated to high temperature for some time. Observe the following statement regarding above process
I. Zinc oxide colour changes to pale yellow
II. The type of defect formed is 'metal deficiency'
III. Some \(\mathrm{Zn}^{2+}\) and \(e^{-}\)are present in interstitial places
The correct statements are
- A I,II only
- B I,III only
- C II,III only
- D I,II,III
Answer & Solution
Correct Answer
(B) I,III only
Step-by-step Solution
Detailed explanation
Zinc oxide is white in colour at room temperature on heating it loses oxygen and turns yellow. \(\mathrm{ZnO} \xrightarrow{\text { heating }} \mathrm{Zn}^{2+}+\frac{1}{2} \mathrm{O}_2+2 \mathrm{e}^{-}\) The excess \(\mathrm{Zn}^{2+}\) ions more to interstitial site and electrons…
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