Question detail
What do NPK fertilisers contain?
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. Compounds of nitrogen, phosphorus, and potassium
- B. Only nitrogen and phosphorus compounds
- C. Only potassium compounds
- D. Compounds of nitrogen and potassium only
Answer
The correct option is Compounds of nitrogen, phosphorus, and potassium. This answer is correct because it matches the approved learning objective to define NPK fertilisers as fertilisers containing compounds of nitrogen, phosphorus and potassium. (Chemistry only) in the subtopic Production and uses of NPK fertilisers.
Explanation
The correct option is Compounds of nitrogen, phosphorus, and potassium. Compounds of nitrogen, phosphorus, and potassium is correct because it directly supports the approved learning objective to define NPK fertilisers as fertilisers containing compounds of nitrogen, phosphorus and potassium. (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 NPK Composition
Students often define NPK fertilisers as containing only nitrogen compounds.
Remember that NPK fertilisers contain compounds of nitrogen, phosphorus, and potassium.
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