Chemistry 0620 · IGCSE · Fertilisers

Fertilisers — practice question

Calcium oxide and ammonium salts are used by farmers to improve soils. Why are these two substances applied at separate times?

  • AThey are both acidic.
  • BThey are both basic.
  • CThey react with each other to produce ammonia.
  • DThey react with each other to produce hydrogen.

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