A Level Chemistry 9701, topic 26.2

Homogeneous and heterogeneous catalysts: past paper questions

14 Cambridge A Level Chemistry 9701 questions on Homogeneous and heterogeneous catalysts (26.2) from 14 papers, 2023 to 2026. Open the paper or try a question free.

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Questions: 14
Papers: 14
Years: 2023 to 2026
Total marks: 158
Average per question: 11.3 marks
Largest question: 16 marks

By type: Structured 14

How hard the questions are

Recall0
Apply0
Analyse14
Not banded0

Derived from the command word Cambridge prints in each question, banded by a fixed table beside the syllabus's own definitions. A question printing no command word is unbanded: unknown, not middling.

Command words

calculateApply11 questions
work out from given facts, figures or information
describeApply9 questions
state the points of a topic / give characteristics and main features
explainAnalyse9 questions
set out purposes or reasons / make the relationships between things evident / provide why and/or how and support with relevant evidence
useApply8 questions
suggestAnalyse6 questions
apply knowledge and understanding to situations where there are a range of valid responses in order to make proposals / put forward considerations
writeRecall5 questions
completeApply4 questions
deduceAnalyse4 questions
conclude from available information
selectRecall3 questions
show thatApply3 questions

Where the questions come from

By year

20261
20255
20246
20232

By session

May/June8
Oct/Nov6

By paper

Paper 414

Questions on this topic

Showing 8 of 14, spread across the years. Open one to write your answer and have it marked.

Question 3May/June 2026, paper 42Structured10 marks
Ethanal, ${CH}_{3} CHO$ , reacts with methanol, ${CH}_{3} OH$ , under acidic conditions to form compound B, as shown in reaction 1.
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Question 3Oct/Nov 2025, paper 41Structured11 marksHas a diagram
Solid manganese(IV) oxide, ${MnO}_{2}$ , catalyses the decomposition of hydrogen peroxide. $2 H_{2} O_{2} (aq) \to 2 H_{2} O (l) + O_{2} (g)$ State the type of catalysis for this reaction.
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Question 5May/June 2023, paper 41Structured13 marks
The exhaust systems of most modern gasoline-fuelled cars contain a catalytic converter with three metal catalysts. These metals act as heterogeneous catalysts. Name three metal catalysts used in catalytic converters.
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Question 2Oct/Nov 2025, paper 42Structured9 marks
Ethanal, $C H_{3} C H O$ , reacts with nitrogen dioxide, $N O_{2}$ . The products of the first step of this reaction are a $C H_{3} \dot{C} = O$ radical and a molecule of nitrous acid, $H N O_{2}$ .
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Question 1Oct/Nov 2024, paper 42Structured14 marksHas a diagram
The equation for reaction 1 is shown. $reaction 1 X \to 2 Y$ Reaction 1 is first order with respect to the concentration of X. The half-life of the reaction, $t_{\frac{1}{2}}$ , is $900 s$ at $20^{\circ} C$ .
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Question 3Oct/Nov 2024, paper 43Structured16 marks
$A$ and $B$ react together to give product $A B$ .
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Question 2May/June 2025, paper 41Structured10 marks
Three experiments are carried out to investigate the reaction of nitrogen oxide, $N O$ , with chlorine. $2 N O + {C l}_{2} \to 2 N O C l$ The rate equation for this reaction is shown.
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Question 5May/June 2024, paper 42Structured9 marks
Nitrosyl chloride, $NOCl$ , can be formed by the reaction between nitrogen monoxide and chlorine, as shown.
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