MHTCET 11 May 2024 Shift 1 Paper

Concept:In the Haber process, $\mathrm{K}_{2}\mathrm{O}$ acts as a promoter that enhances the efficiency of the iron catalyst.Explanation:The Haber process produces ammonia from nitrogen and hydrogen gases.The balanced chemical equation is:$$\mathrm{N}_{2}(g) + 3\mathrm{H}_{2}(g) \rightleftharpoons 2\mathrm{NH}_{3}(g)$$Finely divided iron is used as the catalyst to increase the rate of reaction.A promoter is a substance that improves the activity or life of a catalyst without being a catalyst itself.$\mathrm{K}_{2}\mathrm{O}$ (potassium oxide) increases the effectiveness and durability of the iron catalyst.It also assists in the adsorption of $\mathrm{N}_{2}$ and $\mathrm{H}_{2}$ gases on the catalyst surface.This improves the overall yield of ammonia and makes the process commercially viable.Hence, $\mathrm{K}_{2}\mathrm{O}$ is classified as a promotor in the Haber process.Answer:$\mathrm{K}_{2}\mathrm{O}$ is used as a promotor.Correct option: C. promotor