CuSO4.5H2O and FeSO4.7H2O are blue and green colour compounds respectively. — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Mercury is a liquid metal that easily dissolves or reacts with many metals (like silver, lead, and aluminium) to form alloys called amalgams. Step 2: Iron (Fe) is one of the few metals that does not form an amalgam with mercury under normal conditions. Step 3: Because of this chemical inertness toward mercury, steel or iron containers are used to store and transport mercury. This matches option (d).