1
1 mark
What essential plant nutrients do fertilisers supply?
A | phosphorus | calcium | nitrogen |
B | iron | nitrogen | magnesium |
C | nitrogen | potassium | phosphorus |
D | potassium | calcium | nitrogen |
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Fertilisers (Cambridge (CIE) O Level Chemistry): Exam Questions
Exam code: 5070
48 mins10 questions
1
1 mark
Which pair of substances would make an NPK fertiliser?
ammonium phosphate and potassium chloride
calcium phosphate and potassium chloride
ammonium sulfate and potassium nitrate
potassium nitrate and calcium carbonate
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2
1 mark
Ammonia and sulfuric acid can react in the lab to make ammonium sulfate fertiliser.
What is the formula of the product?
NH3SO4
NH4SO4
(NH4)2SO4
(NH3)2SO4
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1
1 mark
Fertilisers provide three essential elements required for plant growth.
Which substances will make a salt that will contain two of these essential elements?
1 ammonia and nitric acid
2 potassium hydroxide and sulfuric acid
3 ammonia and phosphoric acid
4 potassium hydroxide and nitric acid
1 and 2
1 and 3
2 and 4
3 and 4
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2
1 mark
Different fertilisers contain the essential elements needed for plant growth in varying quantities.
Which fertiliser compound contains the highest percentage by mass of the essential elements needed for growth?
[Relative atomic masses, Ar: H = 1; N = 14; O = 16; P = 31; S = 32; K = 39; Ca = 40]
(NH4)2SO4
NH4NO3
K2SO4
Ca3(PO4)2
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