Which compound can be added to ammonium sulfate to make an NPK fertiliser?
A.
\(\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4}\)
B.
\(\mathrm{KNO}_{3}\)
C.
\(\mathrm{K}_{3} \mathrm{PO}_{4}\)
D.
\(\mathrm{CO}\left(\mathrm{NH}_{2}\right)_{2}\)
Exam No：0620_s24_qp_12 Year：2024 Question No：31
Answer:
C
Knowledge points:
10.2.1. State that ammonium salts and nitrates are used as fertilisers
10.2.2. Describe the use of NPK fertilisers to provide the elements nitrogen, phosphorus and potassium for improved plant growth
Solution:
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