A) Malachite
B) Diaspore
C) Pyrolusite
D) Cassiterite
Correct Answer: A
Solution :
Malachite ?\[CuC{{O}_{3}}.Cu{{(OH)}_{2}}\] Diaspore ?\[A{{l}_{2}}{{O}_{3}}.{{H}_{2}}O\] Pyrolusite ?\[Mn{{O}_{2}}\] Cassiterite?\[Sn{{O}_{2}}\]
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