Question

The catalyst used in the Haber's process of ammonia synthesis is

• A. Iron oxide
• B. Iron oxide with small amounts of $K_{2}O$ and $A{l}_2{O}_3$
• C. $Pt/Rh$ gauge
• D. Red phosphorus

Answer 1

The correct option is B Iron oxide with small amounts of $K_{2}O$ and $A{l}_2{O}_3$

On a large scale, ammonia is manufactured by Haber’s process. In accordance with Le Chatelier’s principle, high pressure would favour the formation of ammonia. The optimum conditions for the production of ammonia are a pressure of $200\times {10}^5\text{Pa}$ (about $200\text{atm}$), a temperature of $700\text{K}$ and the use of a catalyst such as iron oxide with small amounts of $K_{2}O$ and $A{l}_2{O}_3$ to increase the rate of attainment of equilibrium.