When mercury (II) chloride is treated with excess of stannous chloride, the products obtained are : — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Protecting iron from corrosion (rusting) by coating it with a layer of zinc is a process known as galvanization. Step 2: Zinc has a lower reduction potential (more negative E°) than iron, meaning it is more reactive and oxidizes preferentially. Step 3: This sacrificial protection ensures that zinc is oxidized first, protecting the underlying iron. Thus, zinc is used, corresponding to option (b).