लौह अयस्क मैग्नेटाइट के हो – McqOptions

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1.	लौह अयस्क मैग्नेटाइट के होते हैं
A.	Fe2O3
B.	Fe3OH4
C.	FeCO3
D.	3Fe2O3 .. 3H2O
Answer» B. Fe3OH4

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