Fertilisers: past paper questions

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• Question 29May/June 2026, paper 11Multiple choice1 mark

  NPK fertilisers are used to provide three elements for improved plant growth. Which mixture of compounds contains all three of these elements?

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• Question 30May/June 2025, paper 12Multiple choice1 mark

  Nitrates and ammonium salts are used as fertilisers. Which fertiliser contains the greatest mass of nitrogen in $50\text{ kg}$ of the compound?

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• Question 29Oct/Nov 2024, paper 11Multiple choice1 markHas a diagram

  Sodium phosphate, ${\text{Na}}_3{\text{PO}}_4$, and ammonium nitrate, ${\text{NH}}_4{\text{NO}}_3$, are both used as fertilisers. Which row shows the correct percentage by mass of the element in each compound that improves plant growth?

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• Question 31Oct/Nov 2023, paper 12Multiple choice1 markHas a diagram

  Some compounds that can be used as fertilisers are listed.

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• Question 11Oct/Nov 2024, paper 12Multiple choice1 mark

  Which fertiliser contains the highest percentage by mass of nitrogen?

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• Question 30May/June 2023, paper 11Multiple choice1 mark

  What is a cause of deoxygenation of water in a lake?

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• Question 32Oct/Nov 2024, paper 12Multiple choice1 markHas a diagram

  Which row describes an advantage and a disadvantage of fertilisers?

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• Question 31May/June 2023, paper 11Multiple choice1 mark

  Dissolved substances can cause eutrophication and the deoxygenation of water. How many of the ions shown cause this effect?

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• Question 20May/June 2024, paper 11Multiple choice1 markHas a diagram

  The flow chart shows some of the processes and reactions in the formation of ammonia. What are the names of process X, substance 1 and substance 2?

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• Question 23May/June 2023, paper 12Multiple choice1 mark

  The addition of calcium hydroxide to soil reduces its acidity but also reduces the efficiency of fertilisers. Which two equations explain this?

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• Question 32May/June 2024, paper 11Multiple choice1 mark

  NPK fertilisers are used to improve plant growth.

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• Question 31May/June 2024, paper 12Multiple choice1 mark

  Ammonium phosphate, $({\mathrm{N}\mathrm{H}}_4{)}_3{\mathrm{P}\mathrm{O}}_4$, may be used as a fertiliser. What is the percentage by mass of elements that improve plant growth in ammonium phosphate?

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