plumiHeterogeneous catalysts: contact process and catalytic converters: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 17.3.1 Heterogeneous catalysts: contact process and catalytic converters, 2019–2025, with mark schemes and examiner’s reports where available.
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All 12 questions on Heterogeneous catalysts: contact process and catalytic converters, as a list
- January 2025, Unit 5, Q5 (1 mark): Which statement about a catalytic converter used to reduce toxic emissions from internal combustion engines is not true? A the catalyst contains platinum B CO a
- October 2024, Unit 5, Q12 (1 mark): Car exhaust gases react on the surface of a catalytic converter. 2CO + 2NO → 2CO2 + N2 Which interactions could not occur between the gases and the catalytic co
- October 2024, Unit 5, Q13 (1 mark): Which pair of equations shows the most likely mechanism for vanadium(V) oxide acting as a catalyst in the contact process? A V2O5 + ½O2 → V2O6 then V2O6 + SO2 →
- June 2024, Unit 5, Q2 (1 mark): An oxide of vanadium is the catalyst in one step of the contact process for the manufacture of sulfuric acid. Which reaction involves the vanadium oxide catalys
- June 2023, Unit 5, Q14 (1 mark): What is the sequence of oxidation number changes for vanadium when V2O5 is used in the contact process? A +2 → +1 → +2 B +2 → +5 → +2 C +5 → +4 → +5 D +5 → +6 →
- October 2022, Unit 5, Q19(d) (2 marks): In the manufacture of sulfuric acid, vanadium(V) oxide, V2O5 , is the catalyst used in the conversion of sulfur dioxide to sulfur trioxide: 2SO2 + O2 2SO3 Wri
- June 2022, Unit 5, Q1(c) (1 mark): Which substance is manufactured in a process involving a reaction catalysed by vanadium(V) oxide? (1) A ammonia B nitric acid C sodium hydroxide D sulfuric acid
- October 2021, Unit 5, Q8 (1 mark): Which of the following is not true of the reactions occurring in the catalytic converter fitted to a car exhaust? A they involve heterogeneous catalysis B carbo
- October 2021, Unit 5, Q20(a) (1 mark): Titanium(III) chloride is used as a catalyst in the production of poly(propene). State the property of transition metals, such as titanium, that makes their com
- June 2021, Unit 4, Q16(c) (3 marks): The presence of bromate(V) ions in drinking water is harmful to humans. Bromate(V) ions can be converted to less harmful bromide ions by passing the water throu
- January 2021, Unit 5, Q23 (6 marks): Compare and contrast the mechanism of the action of platinum as a catalyst in the * removal of pollutants from car engine exhaust fumes with that of vanadium(V)
- October 2020, Unit 5, Q24(c) (6 marks): Transition metals, their compounds and their ions can act as heterogeneous and homogeneous catalysts. Compare and contrast these two types of catalytic behaviou
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