Question detail
Why are nitrogen, phosphorus, and potassium compounds important in fertilisers?
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. They improve soil texture.
- B. They enhance agricultural productivity.
- C. They increase water retention.
- D. They reduce pest populations.
Answer
The correct option is They enhance agricultural productivity.. This answer is correct because it matches the approved learning objective to explain that nitrogen, phosphorus and potassium compounds are used in fertilisers to improve agricultural productivity. (Chemistry only) in the subtopic Production and uses of NPK fertilisers.
Explanation
The correct option is They enhance agricultural productivity.. They enhance agricultural productivity. is correct because it directly supports the approved learning objective to explain that nitrogen, phosphorus and potassium compounds are used in fertilisers to improve agricultural productivity. (Chemistry only). This belongs to the subtopic Production and uses of NPK fertilisers 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 Production and uses of NPK fertilisers.
Common mistake
Misunderstanding Fertiliser Components
Students often confuse nitrogen, phosphorus, and potassium as being the only components of fertilisers, neglecting to mention that they are compounds.
Clarify that nitrogen, phosphorus, and potassium are elements that form various compounds used in fertilisers, and ensure to specify that these compounds improve agricultural productivity.
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