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Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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12 questions

SA-OC-FZ-0011 markL1 FoundationCalculatorNPK
The three main elements in NPK fertilisers are
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0021 markL1 FoundationCalculatorNPK
Which compound supplies potassium?
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0121 markL1 FoundationCalculatorNPK
Phosphorus in fertilisers mainly helps
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0031 markL2 StandardCalculatorNPK
Ammonium sulfate is made from ammonia and
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0042 marksL2 StandardCalculatorNitrogen %
Calculate the percentage by mass of nitrogen in ammonium nitrate, NH4NO3\mathrm{NH_4NO_3} (Mr=80M_r=80; N 14).

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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0052 marksL2 StandardCalculatorNitrogen %
Calculate the percentage by mass of nitrogen in urea, CO(NH2)2\mathrm{CO(NH_2)_2} (Mr=60M_r=60; N 14).

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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0061 markL2 StandardCalculatorNPK
Adding calcium hydroxide to soil at the same time as ammonium sulfate
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0071 markL2 StandardCalculatorNPK
Nitrogen is needed by plants mainly for
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0081 markL2 StandardCalculatorNPK
Eutrophication is caused when fertilisers
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0091 markL2 StandardCalculatorNitrogen %
How many nitrogen atoms are in one formula unit of ammonium phosphate, (NH4)3PO4\mathrm{(NH_4)_3PO_4}?

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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0101 markL2 StandardCalculatorNPK
Ammonia for fertilisers is made by
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Salam Academy Original Practice · Proposed mark scheme
SA-OC-FZ-0113 marksL3 ExamCalculatorNitrogen %
What mass of nitrogen, in kg, is in 5050 kg of ammonium sulfate, (NH4)2SO4\mathrm{(NH_4)_2SO_4} (Mr=132M_r=132)? Give 3 s.f.

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Salam Academy Original Practice · Proposed mark scheme