Question:
The ore calamine on calcination gives its oxide X. The common name of X is
The ore calamine on calcination gives its oxide X. The common name of X is
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Calamine = Zinc Carbonate ($ZnCO_{3}$). Calcination of any metal carbonate leaves behind the pure metal oxide.
Updated On: Jun 3, 2026
- Cuprite
- Bauxite
- Zincite
- Siderite
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Calcination involves heating carbonate or hydrated ores in the absence of air to convert them into their corresponding metal oxides.
Step 2: Meaning
Calamine is a mineral ore composed of zinc carbonate ($ZnCO_{3}$).
Step 3: Analysis
When calamine ($ZnCO_{3}$) undergoes calcination, it decomposes into zinc oxide ($ZnO$) gasifying carbon dioxide: $$ZnCO_{3}(s) \xrightarrow{\Delta} ZnO(s) + CO_{2}(g)$$ The resulting product X is zinc oxide ($ZnO$). The common mineral name for naturally occurring zinc oxide is **Zincite**. * *Cuprite* is $Cu_{2}O$. * *Bauxite* is $Al_{2}O_{3}\cdot2H_{2}O$. * *Siderite* is $FeCO_{3}$.
Step 4: Conclusion
Therefore, product X matches Zincite.
Final Answer: (C)
Calcination involves heating carbonate or hydrated ores in the absence of air to convert them into their corresponding metal oxides.
Step 2: Meaning
Calamine is a mineral ore composed of zinc carbonate ($ZnCO_{3}$).
Step 3: Analysis
When calamine ($ZnCO_{3}$) undergoes calcination, it decomposes into zinc oxide ($ZnO$) gasifying carbon dioxide: $$ZnCO_{3}(s) \xrightarrow{\Delta} ZnO(s) + CO_{2}(g)$$ The resulting product X is zinc oxide ($ZnO$). The common mineral name for naturally occurring zinc oxide is **Zincite**. * *Cuprite* is $Cu_{2}O$. * *Bauxite* is $Al_{2}O_{3}\cdot2H_{2}O$. * *Siderite* is $FeCO_{3}$.
Step 4: Conclusion
Therefore, product X matches Zincite.
Final Answer: (C)
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