Chemistry 5070 · O Level · Fertilisers

Fertilisers — practice question

NPK fertilisers are applied to promote plant growth. A solid NPK fertiliser is described by these properties: • soluble in water • forms an aqueous solution with pH $7$ Which substances are combined to produce a solid NPK fertiliser?

  • Aammonium nitrate, potassium sulfate and phosphorus oxide
  • Bammonium phosphate and potassium hydroxide
  • Cammonium sulfate, calcium nitrate and sodium phosphate
  • Dpotassium nitrate and sodium phosphate

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