Hg is the only metal which is liquid at 0°C. — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Malachite is a basic copper carbonate mineral with the formula CuCO3.Cu(OH)2, which has a vibrant green color. Step 2: Azurite is also a basic copper carbonate mineral but with the formula 2CuCO3.Cu(OH)2, which has a deep blue color. Step 3: Thus, malachite and azurite are used respectively as green and blue pigments, corresponding to option (c).