Question detail
Which of the following statements is true about NPK 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 contain only nitrogen compounds.
- B. They are used to improve agricultural productivity.
- C. They are made from organic materials only.
- D. They do not affect plant growth.
Answer
The correct option is They are used to improve 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 are used to improve agricultural productivity.. They are used to improve 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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