Question : Which one of the following mineral does not contain oxygen?
Option 1: Haematite
Option 2: Bauxite
Option 3: Cryolite
Option 4: Calcite
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Correct Answer: Cryolite
Solution : The correct option is Cryolite .
Chemical name - Na 3 AlF 6 , no traces of oxygen.
Cryolite is a mineral that consists of sodium aluminium fluoride. It is primarily used in the production of aluminium, as it lowers the melting point of aluminium oxide during the electrolytic process.
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