Which of the following is the most suitable catalyst for ammonia synthesis ?
Correct answer: C. Fe in fused mixture of Al2O3 + SiQ2 + MgO
- A. Pt
- B. ZnO + Cr2O3
- C. Fe in fused mixture of Al2O3 + SiQ2 + MgO
- D. All of the above
Explanation
The Haber process uses finely divided iron as the catalyst, with metal oxides acting as promoters to improve its activity and stability. The promoted iron mixture in option c is therefore the intended catalyst system. Students may choose d by assuming that any substance sometimes used as a catalyst can replace iron, but platinum and ZnO plus Cr2O3 are not the standard Haber catalyst.
Last updated
About Haber's Process
Haber's process produces ammonia by reacting nitrogen with hydrogen in a reversible, exothermic equilibrium. The topic covers the iron catalyst, operating temperature and pressure, Le Chatelier's principle, the compromise between reaction rate and equilibrium yield, and the removal and recycling of ammonia and unreacted gases.
Practise Chemical Equilibrium
625 free Chemical Equilibrium MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
In Haber's process, the volume percentage of ammonia in the equilibrium mixture is:
In the Haber process for manufacturing ammonia, the catalyst used is
In the Haber's process, the final product ammonia is converted into:
_ is used as catalyst in Haber's process for NH3 gas manufacture.
Liquid Ammonia has become an important fertilizer for direct application to soil. It contains _Nitrogen.