11 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 O Level Chemistry)
Exam Questions
48 mins10 questions11 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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21 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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11 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
1 markDifferent 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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