Which one contains both Ca and Mg? — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Step 1: Write down the chemical formulas for each mineral: Limestone is primarily calcium carbonate (CaCO3); Chalk is also CaCO3; Feldspar is a group of aluminosilicate minerals. Step 2: Dolomite is a double carbonate mineral with the chemical formula CaMg(CO3)2. Step 3: Since Dolomite contains both calcium (Ca) and magnesium (Mg), option (b) is the correct answer.