During the electrolysis of carnallite, MgCl2 is decomposed and not KCl. This is because of : — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

Step 1: Leaching is a chemical concentration method where a mineral is selectively dissolved by a liquid reagent, leaving insoluble impurities behind. Step 2: In Baeyer's process, impure bauxite (Al2O3) is concentrated by reacting with hot concentrated sodium hydroxide solution, selectively dissolving aluminium as soluble sodium aluminate. Step 3: Thus, chemical leaching is useful in the concentration of Bauxite, corresponding to option (b).