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CHEMISTRY 0620/41
Paper 4 Theory (Extended) May/June 2025
1 hour 15 minutes
You must answer on the question paper.
No additional materials are needed.
INSTRUCTIONS
● Answer all questions.
● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
● Write your name, centre number and candidate number in the boxes at the top of the page.
● Write your answer to each question in the space provided.
● Do not use an erasable pen or correction fluid.
● Do not write on any bar codes.
● You may use a calculator.
● You should show all your working and use appropriate units.
INFORMATION
● The total mark for this paper is 80.
● The number of marks for each question or part question is shown in brackets [ ].
● The Periodic Table is printed in the question paper.
This document has 16 pages. Any blank pages are indicated.
DC (CE/SG) 342087/2
© UCLES 2025 [Turn over
, © UCLES 2025
,
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0620/41/M/J/25
BLANK PAGE
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DO NOT WRITE IN THIS MARGIN
3
, ,
1 A list of substances is shown.
bauxite calcium oxide ethanol graphite methane
nitrogen oxygen propane propene sulfur dioxide
Answer the questions using the list of substances.
Each substance may be used once, more than once, or not at all.
State which of the substances:
DO NOT WRITE IN THIS MARGIN
(a) is a basic oxide
............................................................................................................................................. [1]
(b) contains carbon atoms only
............................................................................................................................................. [1]
(c) is manufactured by fermentation
............................................................................................................................................. [1]
DO NOT WRITE IN THIS MARGIN
(d) is produced by the decomposition of vegetation
............................................................................................................................................. [1]
(e) contains aluminium oxide
............................................................................................................................................. [1]
(f) causes acid rain
............................................................................................................................................. [1]
DO NOT WRITE IN THIS MARGIN
(g) is a simple molecule with 11 atoms
............................................................................................................................................. [1]
(h) is produced when limestone thermally decomposes in the blast furnace
............................................................................................................................................. [1]
(i) is a gas that is approximately 21% of clean, dry air
............................................................................................................................................. [1]
(j) is a monomer in addition polymerisation.
DO NOT WRITE IN THIS MARGIN
............................................................................................................................................. [1]
[Total: 10]
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0620/41/M/J/25 [Turn over
, ,
Cambridge IGCSE™
¬O. 4mHuOªE]{5W
¬?zSª}kov¢
¥EEU5U U5e E5Eu¥U
* 2 3 1 9 5 2 5 7 6 4 *
CHEMISTRY 0620/41
Paper 4 Theory (Extended) May/June 2025
1 hour 15 minutes
You must answer on the question paper.
No additional materials are needed.
INSTRUCTIONS
● Answer all questions.
● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
● Write your name, centre number and candidate number in the boxes at the top of the page.
● Write your answer to each question in the space provided.
● Do not use an erasable pen or correction fluid.
● Do not write on any bar codes.
● You may use a calculator.
● You should show all your working and use appropriate units.
INFORMATION
● The total mark for this paper is 80.
● The number of marks for each question or part question is shown in brackets [ ].
● The Periodic Table is printed in the question paper.
This document has 16 pages. Any blank pages are indicated.
DC (CE/SG) 342087/2
© UCLES 2025 [Turn over
, © UCLES 2025
,
* 0000800000002 *
ĥĕÕÕõµÅµąĥÅÅÅõåµÅÕ
Ĭ¿ýùÒĞĄīÔñöĔèĀÒ±ĖĂ
ĬÍĊ®Ġ´íÈõÏĪÅĊàù·þ×
,
2
0620/41/M/J/25
BLANK PAGE
DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN
, * 0000800000003 *
DO NOT WRITE IN THIS MARGIN
3
, ,
1 A list of substances is shown.
bauxite calcium oxide ethanol graphite methane
nitrogen oxygen propane propene sulfur dioxide
Answer the questions using the list of substances.
Each substance may be used once, more than once, or not at all.
State which of the substances:
DO NOT WRITE IN THIS MARGIN
(a) is a basic oxide
............................................................................................................................................. [1]
(b) contains carbon atoms only
............................................................................................................................................. [1]
(c) is manufactured by fermentation
............................................................................................................................................. [1]
DO NOT WRITE IN THIS MARGIN
(d) is produced by the decomposition of vegetation
............................................................................................................................................. [1]
(e) contains aluminium oxide
............................................................................................................................................. [1]
(f) causes acid rain
............................................................................................................................................. [1]
DO NOT WRITE IN THIS MARGIN
(g) is a simple molecule with 11 atoms
............................................................................................................................................. [1]
(h) is produced when limestone thermally decomposes in the blast furnace
............................................................................................................................................. [1]
(i) is a gas that is approximately 21% of clean, dry air
............................................................................................................................................. [1]
(j) is a monomer in addition polymerisation.
DO NOT WRITE IN THIS MARGIN
............................................................................................................................................. [1]
[Total: 10]
ĬÏĊ®Ġ´íÈõÏĪÅĊàû·þ×
© UCLES 2025 Ĭ¿þúÚĬĀěåćċÕôøƱĦĂ
ĥĕåĕµÕåÕĕĕĕÅÅĕÅõÕÕ
0620/41/M/J/25 [Turn over
