A solid substance upon dry heating exhibits a color change: it is yellow when hot and turns white wh — Qualitative and Quantitative Analysis Chemistry Question
Question
A solid substance upon dry heating exhibits a color change: it is yellow when hot and turns white when cold. This indicates the presence of which metal?
Answer: B
💡 Solution & Explanation
Zinc oxide ($ZnO$) exhibits a characteristic property of being yellow when hot and white when cold due to the creation of lattice defects (oxygen vacancies) at high temperatures that shift its absorption spectrum.
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