Statement - I : Zinc oxide is yellow colored when hot.
Statement - II : Zinc oxide has metal excess defect due to anionic vacancies.

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Both statements I and II are correct

Statement-I is incorrect and statement-II is correct

Both statements I and II are incorrect

Statement-I is correct and statement-II is incorrect

answer is B.

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Detailed Solution

Zinc oxide is white in color at room temperature.
On heating it loses oxygen and turns yellow.
Now there is excess of zinc in the crystal and its formula becomes Zn_1+xO.
The excess Zn²⁺ ions move to interstitial sites and the electrons to neighboring interstitial sites.

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