Froth floatation process used for the concentration of sulphide ore : — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Step 1: Examine the composition of each mineral: Carnallite is KCl.MgCl2.6H2O; Magnesite is MgCO3; Dolomite is CaMg(CO3)2. Step 2: Gypsum is a hydrated calcium sulfate mineral with the formula CaSO4.2H2O. Step 3: Since Gypsum contains Calcium and Sulfur but no Magnesium, it is not an ore of magnesium, matching option (d).