MHTCET 5 May 2025 Shift 2 Paper

Concept:The given reaction is the water-gas shift reaction, used industrially for hydrogen production.Explanation:The reaction is: $\mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_{2}\mathrm{O}_{(\mathrm{g})}\xrightarrow{623\ \mathrm{K}}\mathrm{CO}_{2(\mathrm{g})}+\mathrm{H}_{2(\mathrm{g})}$At high temperature, around $623\ \mathrm{K}$, this reaction is carried out using iron oxide $(\mathrm{Fe}_{2}\mathrm{O}_{3})$ promoted with chromium oxide $(\mathrm{Cr}_{2}\mathrm{O}_{3})$.This mixed catalyst is commonly known as iron chromate catalyst.Vanadium pentoxide $(\mathrm{V}_{2}\mathrm{O}_{5})$ is used in the contact process for $\mathrm{SO}_{2}$ oxidation.Nickel metal is used for hydrogenation of alkenes.Traces of acid or alkali are used in hydrolysis reactions, not in this shift reaction.Therefore, the catalyst used here is iron chromate.Answer:Option A: Iron chromate