Question detail
Why are unreacted nitrogen and hydrogen recycled in the Haber process?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The Haber process and the use of NPK fertilisers
Question
- A. To reduce waste and improve efficiency
- B. To increase the temperature of the reaction
- C. To create more ammonia directly
- D. To lower the pressure in the reactor
Answer
The correct option is To reduce waste and improve efficiency. This answer is correct because it matches the approved learning objective to describe purified nitrogen and hydrogen passing over an iron catalyst. (Chemistry only) in the subtopic The Haber process.
Explanation
The correct option is To reduce waste and improve efficiency. To reduce waste and improve efficiency is correct because it directly supports the approved learning objective to describe purified nitrogen and hydrogen passing over an iron catalyst. (Chemistry only). This belongs to the subtopic The Haber process within The Haber process and the use of NPK fertilisers, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from The Haber process.
Common mistake
Common Misunderstanding of the Haber Process
Students often confuse the role of the iron catalyst with the reactants in the Haber process, thinking that the catalyst is a reactant.
Remember that the iron catalyst is not consumed in the reaction; it only speeds up the process of ammonia formation without being part of the chemical equation.
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