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 decrease the pressure in the reactor
- D. To enhance the color of the ammonia produced
Answer
The correct option is To reduce waste and improve efficiency. This answer is correct because it matches the approved learning objective to recall typical Haber process conditions of about 450 degrees Celsius and about 200 atmospheres. (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 recall typical Haber process conditions of about 450 degrees Celsius and about 200 atmospheres. (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
Haber Process Conditions
Students often confuse the temperature and pressure conditions of the Haber process, stating incorrect values such as 350 degrees Celsius or 150 atmospheres.
Remember that the typical conditions for the Haber process are about 450 degrees Celsius and about 200 atmospheres.
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