A) Malachite
B) Cassiterite
C) Pyrolusite
D) Magnetite
Correct Answer: D
Solution :
Mineral | Chemical composition |
Malachite Cassiterite Pyrolusite Magnetite | \[CuC{{O}_{3}}\cdot Cu{{(OH)}_{2}}\] \[Sn{{O}_{2}}\] \[Mn{{O}_{2}}\] \[F{{e}_{3}}{{O}_{4}}\] |
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