Correct option is C
Correct Answer: (c) Carnalite
Explanation:
Carnalite (KMgCl₃·6H₂O) is an important ore of magnesium.
It is a hydrous chloride of potassium and magnesium, primarily used in the extraction of magnesium metal.
Information Booster:
Magnesium is commonly extracted from carnalite and dolomite.
Magnesium is used in aerospace, automotive, and alloy industries due to its light weight and strength.
Additional Information:
(a) Cassiterite
Primary ore of tin (SnO₂).
(b) Malachite
A green mineral, important ore of copper (Cu₂CO₃(OH)₂).
(d) Galena
Primary ore of lead (PbS).
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