A) Magnesite
B) Dolomite
C) Gypsum
D) Camallite
Correct Answer: C
Solution :
Magnesite ? \[MgC{{O}_{3}}\] Dolomite ? \[MgC{{O}_{3}}.CaC{{O}_{3}}\] Gypsum ? \[CaS{{O}_{4}}.2{{H}_{2}}O\] Camallite ? \[KCl.MgC{{l}_{2}}.6{{H}_{2}}O\] \[\therefore \]Gypsum is not an ore of magnesium as it has no Mg.
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