A) Magnesite
B) Dolomite
C) Gypsum
D) Carnalite
Correct Answer: C
Solution :
Gypsum \[(CaS{{O}_{4}}.2{{H}_{2}}O)\] is an ore of calcium. Dolomite \[(CaC{{O}_{3}}.MgC{{O}_{3}})\], Magnesite \[(MgC{{O}_{3}})\] and Carnalite \[(KCl.MgC{{l}_{2}}.6{{H}_{2}}O)\] are the ores of Magnesium.
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