Question:
In Haber process of production of ammonia \(\text{Al}_2\text{O}_3\) is used as
In Haber process of production of ammonia \(\text{Al}_2\text{O}_3\) is used as
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The Haber catalyst is iron; Al2O3 and K2O improve its activity.
Updated On: Oct 1, 2026
- Adsorbate
- Inhibitor
- Catalyst
- Promoter
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
In the Haber process, nitrogen and hydrogen combine to give ammonia over finely divided iron. Small amounts of other substances are added to make the iron catalyst work better.
Step 2: Key idea
A substance that is not a catalyst by itself but raises the activity of the catalyst is called a promoter.
Step 3: Check the options
(A) Adsorbate: this is the substance that sticks to the surface, such as the reacting gases. \(\text{Al}_2\text{O}_3\) is not a reactant.
(B) Inhibitor: this slows a reaction. \(\text{Al}_2\text{O}_3\) does not slow the process.
(C) Catalyst: the catalyst is iron.
(D) Promoter: \(\text{Al}_2\text{O}_3\) (with \(\text{K}_2\text{O}\)) increases the efficiency of the iron catalyst. Correct.
Final Answer:
Aluminium oxide improves the iron catalyst, so it acts as a promoter, option (D). \[ \boxed{\text{Promoter}} \]
In the Haber process, nitrogen and hydrogen combine to give ammonia over finely divided iron. Small amounts of other substances are added to make the iron catalyst work better.
Step 2: Key idea
A substance that is not a catalyst by itself but raises the activity of the catalyst is called a promoter.
Step 3: Check the options
(A) Adsorbate: this is the substance that sticks to the surface, such as the reacting gases. \(\text{Al}_2\text{O}_3\) is not a reactant.
(B) Inhibitor: this slows a reaction. \(\text{Al}_2\text{O}_3\) does not slow the process.
(C) Catalyst: the catalyst is iron.
(D) Promoter: \(\text{Al}_2\text{O}_3\) (with \(\text{K}_2\text{O}\)) increases the efficiency of the iron catalyst. Correct.
Final Answer:
Aluminium oxide improves the iron catalyst, so it acts as a promoter, option (D). \[ \boxed{\text{Promoter}} \]
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