A) Anhydrite
B) Bauxite
C) Corundum
D) Diaspore
Correct Answer: A
Solution :
Bauxite\[(A{{l}_{2}}{{O}_{3}}.2{{H}_{2}}O)\] Corundum\[(A{{l}_{2}}{{O}_{3}})\] Diaspore\[(A{{l}_{2}}{{O}_{3}}.{{H}_{2}}O)\]
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