Lesson 4.10.4.2
4.10.4.2 Production and uses of NPK fertilisers Quiz: AQA Chemistry, Unit 10
20 questions
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Lesson 4.10.4.2, Production and uses of NPK fertilisers: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 10: Using resources, written with Revision Ninja.
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The 20 questions
-
Which three nutrient elements are represented by the letters in NPK fertilisers?
- Nitrogen, potassium, carbon
- Nitrogen, phosphorus, krypton
- Nitrogen, phosphorus, potassium
- Sodium, phosphorus, potassium
-
How are potassium chloride, potassium sulfate and phosphate rock obtained?
- By electrolysis
- By mining
- By fermentation
- By distillation
-
Why can phosphate rock not be used directly as a fertiliser?
- Decomposes in sunlight
- Too chemically reactive
- Contains toxic metals
- Insoluble in water
-
What must phosphate rock be treated with to produce soluble salts?
- Acids
- Water
- Salts
- Alkalis
-
Which industrial product is manufactured directly from ammonia?
- Phosphate rock
- Calcium sulfate
- Potassium chloride
- Nitric acid
-
How are NPK fertilisers best described chemically?
- Formulations of salts
- Pure compounds
- Simple mixtures
- Covalent polymers
-
What is the primary agricultural purpose of NPK fertilisers?
- Prevent pest damage
- Reduce soil acidity
- Improve crop productivity
- Kill harmful weeds
-
Phosphate rock is treated with nitric acid. Which salt is produced?
- Potassium iodide
- Lead sulfate
- Calcium nitrate
- Sodium chloride
-
Which salt is produced when phosphate rock is treated with phosphoric acid?
- Calcium dihydrogen phosphate
- Calcium chloride
- Calcium sulfate
- Calcium nitrate
-
Phosphate rock is treated with sulfuric acid. Which salt is produced?
- Calcium sulfate
- Sodium nitrate
- Potassium bromide
- Calcium chloride
-
Which fertiliser salt contains potassium?
- Potassium chloride
- Sodium chloride
- Calcium nitrate
- Ammonium chloride
-
Which element comes from ammonium salts in NPK fertilisers?
- Nitrogen
- Potassium
- Phosphorus
- Sulfur
-
Which raw material provides the nitrogen content in formulated NPK fertilisers?
- Sodium chloride
- Calcium phosphate
- Potassium sulfate
- Ammonium nitrate
-
A farmer uses a fertiliser that supplies phosphorus. Which letter of NPK does this refer to?
- S
- N
- P
- K
-
What feature distinguishes industrial fertiliser production from lab preparation?
- Lower temperatures
- Batch production
- Simpler glassware
- Integrated processes
-
Why do NPK fertilisers contain specific percentages of each element?
- Optimal crop nutrition
- Faster soil drainage
- Cheaper production
- Prevents plant disease
-
Which listed raw material is also obtained by mining?
- Ammonia
- Ammonium salts
- Nitric acid
- Phosphate rock
-
What essential physical property must fertiliser compounds possess?
- High density
- Low melting point
- Magnetic properties
- Water solubility
-
Which industrial process produces the ammonia used in fertilisers?
- Bayer process
- Contact process
- Cracking process
- Haber process
-
What are NPK fertilisers formulated as mixtures of?
- Organic acids
- Pure elements
- Soluble salts
- Insoluble rocks
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