A) \[A{{l}_{2}}{{O}_{3}}.2{{H}_{2}}O\]
B) \[A{{l}_{2}}{{O}_{3}}\]
C) \[A{{l}_{2}}{{O}_{3}}.{{H}_{2}}O\]
D) \[AlP{{O}_{4}}\]
Correct Answer: C
Solution :
Ores of aluminium are: Diaspore \[-A{{l}_{2}}{{O}_{3}}.{{H}_{2}}O\] Bauxite \[-A{{l}_{2}}{{O}_{3}}.2{{H}_{2}}O\] Corundum \[-A{{l}_{2}}{{O}_{3}}\] Cryolite \[-N{{a}_{3}}Al{{F}_{6}}\] Felspar \[KAlS{{i}_{3}}{{O}_{8}}\] * Bauxite is the chief ore of aluminium.
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