A) Ferrous oxide
B) Ferric oxide
C) Ferric hydroxide
D) Ferroso - ferric oxide
Correct Answer: D
Solution :
Magnetite is the most important of iron. It is isometric in structure, strongly magnetic. \[{{\operatorname{Fe}}_{3}} {{O}_{4}}\]containing ore. It the mineral with highest iron content. (72.4 %).
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