plumiThe Haber process and fertilisers: Edexcel GCSE Chemistry questions
Every Edexcel GCSE Chemistry exam question on The Haber process and fertilisers (specification points 5.19–5.24), 2018–2025, with its mark scheme and examiner’s report.
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Q4(b)
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Q9(b)(ii)
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Q10(b)
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Q10(a)(i)
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Q10(a)(ii)
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Q2(b)(iii)
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Q5(a)(i)
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Q5(a)(ii)
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Q5(a)(iii)
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Q7(a)(ii)
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Q7(a)(i)
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Q7(a)(iii)
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Q7(b)(ii)
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Q1(a)
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Q1(b)(i)
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Q8(d)
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Q1(a)(i)
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All 43 questions on The Haber process and fertilisers, as a list
- June 2025, Paper 1 Higher, Q4(b) (2 marks): Phosphoric acid can react to form phosphate salts which are used in fertilisers. Give two reasons why farmers use fertilisers on their fields. (2) 1 2
- June 2025, Paper 1 Higher, Q9(b)(ii) (1 mark): Figure 8 shows the changes in percentage yield of ammonia at equilibrium as temperature increases, at a pressure of 300 atmospheres and at a pressure of 1000 at
- June 2025, Paper 1 Higher, Q9(b)(iii) (2 marks): In industry, a pressure of 200 atmospheres is used for the Haber process. Using Figure 8, explain what happens to the position of dynamic equilibrium if the pro
- June 2025, Paper 1 Foundation, Q10(b) (2 marks): Phosphoric acid can react to form phosphate salts which are used in fertilisers. Give two reasons why farmers use fertilisers on their fields. (2) 1 2
- June 2024, Paper 1 Higher, Q10(a)(i) (2 marks): Describe the effect of the catalyst on the rate of attainment of equilibrium and on the equilibrium yield of products. (2)
- June 2024, Paper 1 Higher, Q10(a)(ii) (6 marks): A manufacturer produces hydrogen by the reaction of methane with steam in the presence of a nickel catalyst using the conditions temperature 600 °C pressure 20
- June 2024, Paper 1 Foundation, Q2(b)(iii) (2 marks): Explain why some farmers spread ammonium sulfate on their fields. (2)
- June 2023, Paper 1 Higher, Q5(a)(i) (3 marks): Write the balanced equation for the reversible reaction between nitrogen and hydrogen to make ammonia, NH3. (3)
- June 2023, Paper 1 Higher, Q5(a)(ii) (1 mark): Which row shows the typical conditions of temperature and pressure used in the Haber process? (1) temperature in °C pressure in atmospheres A 250 100 B 250 200
- June 2023, Paper 1 Higher, Q5(a)(iii) (1 mark): In the Haber process, iron is added to the vessel where the nitrogen and hydrogen react. State the purpose of the iron. (1)
- June 2023, Paper 1 Higher, Q7(a)(ii) (1 mark): Ammonium nitrate is a fertiliser. Another fertiliser is ammonium phosphate. Which elements are combined in ammonium phosphate? (1) A nitrogen, oxygen and phosph
- June 2023, Paper 1 Foundation, Q7(a)(i) (1 mark): State which element, often present in fertilisers, is not present in this fertiliser. (1)
- June 2023, Paper 1 Foundation, Q7(a)(iii) (1 mark): State why farmers spread fertilisers on their fields. (1)
- June 2023, Paper 1 Foundation, Q7(b)(ii) (1 mark): Ammonium sulfate can also be made in the laboratory by titrating ammonia solution with dilute sulfuric acid. Give one disadvantage of using this laboratory meth
- June 2022, Paper 1 Foundation, Q1(a) (2 marks): Figure 1 shows a bag of NPK fertiliser. NPK fertiliser Figure 1 N, P and K are the symbols of three elements that are essential for plant growth. N is the symbo
- June 2022, Paper 1 Foundation, Q1(b)(i) (1 mark): State the name of this industrial process. (1)
- November 2021, Paper 1 Higher, Q8(d) (6 marks): The hydrogen used in a hydrogen-oxygen fuel cell can be produced from CO2 + 3H2 methanol, CH3OH. CH3OH + H2O In this reaction the forward reaction is endoth
- November 2021, Paper 1 Foundation, Q1(a)(i) (1 mark): State why fertilisers are added to soil. (1)
- November 2021, Paper 1 Foundation, Q1(a)(ii) (2 marks): Fertilisers contain compounds of different elements. Three of these elements have the symbols K, N and P. Use the periodic table to state the names of these thr
- November 2021, Paper 1 Foundation, Q5(a) (2 marks): The nitrogen and hydrogen are obtained from raw materials. Draw one straight line from each gas to the raw material it is obtained from. (2) gas raw material ai
- November 2021, Paper 1 Foundation, Q5(c) (2 marks): The reaction between nitrogen and hydrogen happens at a pressure of 200 atmospheres. Another unit of pressure is Pascals, Pa (1 atmosphere = 101 325 Pa). Calcul
- November 2021, Paper 2 Foundation, Q8(d)(i) (1 mark): Which symbol should be placed on a container of a toxic gas? (1) A B C D
- November 2021, Paper 2 Foundation, Q8(d)(ii) (1 mark): Give one safety precaution that should be taken when working with toxic gases in the laboratory. (1)
- November 2020, Paper 1 Higher, Q10(a)(i) (1 mark): An iron catalyst can be used in the reaction. Which row of the table shows how adding the iron catalyst affects the rate of attainment of equilibrium and the eq
- November 2020, Paper 1 Higher, Q10(a)(iii) (4 marks): The reaction is carried out at a pressure of 200 atmospheres. Explain what effect a pressure higher than 200 atmospheres would have on the rate of attainment of
- November 2020, Paper 1 Higher, Q10(b)(i) (1 mark): Suggest one other reason for using solid ammonium sulfate and solid ammonium nitrate as nitrogenous fertilisers. (1)
- November 2020, Paper 1 Higher, Q10(b)(iii) (2 marks): Describe one similarity and one difference between the industrial production of ammonium sulfate and the laboratory preparation of ammonium sulfate. (2) similar
- November 2020, Paper 1 Foundation, Q3(a)(i) (1 mark): Give the name of the industrial process used to manufacture ammonia. (1)
- November 2020, Paper 1 Foundation, Q3(c)(ii) (2 marks): Explain the importance of fertilisers in farming. (2)
- June 2019, Paper 1 Higher, Q7(d)(i) (1 mark): State the name of the industrial process to manufacture ammonia. (1)
- June 2019, Paper 1 Higher, Q7(d)(ii) (1 mark): Predict the effect that adding the catalyst has on the rate of attainment of equilibrium. (1)
- June 2019, Paper 1 Higher, Q7(d)(iii) (1 mark): Predict the effect that adding the catalyst has on the equilibrium yield of ammonia. (1)
- June 2019, Paper 1 Higher, Q10(c) (6 marks): In another stage in the production of nitric acid, ammonia is reacted with oxygen to form nitrogen oxide and water. 4NH3(g) + 5O2(g) U 4NO(g) + 6H2O(g) Heat ene
- June 2019, Paper 1 Foundation, Q7(a)(i) (1 mark): State the name of an element in these compounds that promotes plant growth.
- June 2019, Paper 1 Foundation, Q7(b)(ii) (1 mark): State the formula of a molecule of ammonia. (1)
- June 2019, Paper 1 Foundation, Q7(b)(iii) (1 mark): Figure 7 shows a graph of world ammonia production, in millions of tonnes, from 1945 to 2015. 160 world ammonia 140 production in millions 120 - of tonnes 100 -
- June 2018, Paper 1 Higher, Q7(d) (6 marks): The reaction to produce sulfur trioxide reaches an equilibrium. ` 2SO3(g) 2SO2(g) + O2(g) _ The forward reaction is exothermic. The rate of attainment of equili
- June 2018, Paper 1 Higher, Q8(a)(ii) (2 marks): Ammonia, NH3, is made by reacting nitrogen with hydrogen. Write the balanced equation for this reaction. (2)
- June 2018, Paper 1 Foundation, Q1(c)(iii) (2 marks): Explain why farmers spread ammonium nitrate on their fields. (2)
- Specimen, Paper 1 Higher, Q7(a)(i) (3 marks): This reaction takes place in industry at 1–2 atm pressure and can reach a dynamic equilibrium. Explain the effect on the rate of attainment of equilibrium, if t
- Specimen, Paper 1 Higher, Q7(b) (1 mark): When there are alternative methods of producing a product, the final pathway is chosen by considering atom economy, cost of energy, yield of product and rates o
- Specimen, Paper 1 Higher, Q7(c) (6 marks): The reaction between nitrogen and hydrogen is exothermic. 2NH3 N2 + 3H2 If nitrogen and hydrogen were reacted at 150 atm pressure and 300 °C, without a cata
- Specimen, Paper 1 Foundation, Q2(b) (1 mark): Give one advantage of using fertilisers made from ammonia rather than using manure. (1)
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