Exams › JEE Advanced › Chemistry
Among the following minerals, how many contain magnesium (Mg)? The minerals are: Magnetite, Carnallite, Epsom salt, Siderite.
- 1
- 3
- infinite
- 2
Correct answer: 2
Solution
Magnetite (Fe3O4) and Siderite (FeCO3) contain iron, not magnesium. Carnallite (KCl*MgCl2*6H2O) and Epsom salt (MgSO4*7H2O) both contain magnesium. So 2 minerals contain Mg.
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