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