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प्रश्न
Which of the following ores does not contain oxygen?
पर्याय
Magnesite
Zincite
Epsom salt
Cryolite
MCQ
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उत्तर
Cryolite
Explanation:
Cryolite (Na3AlF6) is a fluoride ore that does not contain oxygen. The other ores, like magnesite (MgCO3), zincite (ZnO), and Epsom salt (MgSO4 . 7H2O), all contain oxygen in their composition.
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