Vapour Phase Refining techniques, such as Mond's process and the Van Arkel method, depend on two str — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

In vapour phase refining, the impure metal is first reacted with a specific reagent (like $CO$ or $I_2$) at a moderate temperature to form a volatile complex (leaving solid impurities behind). This volatile gas is then subjected to a much higher temperature where it is thermally unstable, decomposing back into ultra-pure metal and the recycled reagent.