In which of the following mineral(s) Al is present?
A
Both A and B
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B
Magnetite
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C
Cryolite
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D
Siderite
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Solution
The correct option is C Cryolite The chemical composition of cryolite is Na3AlF6. Aluminium is present in this mineral. The other minerals are:
Magnetite - Fe3O4 and
Siderite - FeCO3