Q. - Ore of zinc is
a. Sphalerite
b. Zincite
c. Calamine
d. All of these
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Explanation:
a. Sphalerite
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The important minerals in zinc ores are sphalerite (ZnS), zincite (ZnO), franklinite [ZnO(Fe,Mn)2O3], calamine [Zn2(OH)2SiO3], and smithstone (ZnCO3). Zinc ores normally contain 5–15% zinc.
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