Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/22 Oct/Nov 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 2, Oct/Nov 2025: the question paper and its official mark scheme, 40 questions worth 40 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 40
- Marks
- 40
- Grade A from
- 25
File names: 0620_w25_qp_22 · 0620_w25_ms_22
Grade thresholds for 0620/22 Oct/Nov 2025
The minimum raw marks Cambridge set for each grade on this component (out of 40). Thresholds change every session and variant, so always compare your score with the paper you actually sat.
| A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|
| 25 | 22 | 19 | 17 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/22 Oct/Nov 2025 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/22 Oct/Nov 2025
- Question 1
What happens to the volume of a fixed mass of gas when the temperature is increased or the pressure is decreased? increased temperature decreased pressure A volume decreased volume decreased B volume decreased volume increased C volume increased volume decreased …
- Question 2
The diagram shows the heating curve for a substance. temperature time …
- Question 3
A student investigates the diffusion of ammonia gas, NH3, and hydrogen chloride gas, HCl. Two sets of apparatus are set up as shown at room temperature and pressure. apparatus 1 source of ammonia gas damp red litmus paper apparatus 2 …
- Question 4
Which row describes elements, compounds and mixtures? elements compounds mixtures A all the atoms are the same type contain different atoms chemically joined together can be separated using physical processes B all the atoms are the same type can be …
- Question 5
Which statement about atoms or ions is correct? A The mass number of an atom is the total number of nucleons and protons. B The electronic configuration of an aluminium ion, Al 3+, is 2,8,3. C Hydrogen is the only …
- Question 6
Which two values are used to calculate the relative atomic mass of a sample of boron? value 1 value 2 A the total number of boron isotopes the total number of boron atoms B the relative abundance of each boron …
- Question 7
Which statement describes the structure of sodium chloride? A a lattice of alternating positive and negative ions B a lattice of positive ions surrounded by a ‘sea’ of delocalised electrons C a mixture of sodium and chlorine atoms D a …
- Question 8
Graphite and diamond are both forms of the element carbon. Which row shows the number of other carbon atoms that each carbon atom is covalently bonded to in graphite and in diamond? graphite diamond …
- Question 9
Which row describes the structure and bonding in cobalt? structure bonding A giant ionic B simple ionic C giant metallic D simple metallic
- Question 10
The equation for the combustion of ethanol is shown. C2H5OH …
- Question 11
A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen only. The relative molecular mass, Mr, of the compound is 60. Which row shows the empirical formula and the molecular formula of the compound? empirical formula molecular formula A CH2O …
- Question 12
Hydrogen–oxygen fuel cells are used in electric cars. Three statements about these fuel cells are listed. 1 The process in the cell is called electrolysis. 2 Water is broken down in the cell to produce hydrogen, oxygen and electricity. 3 …
- Question 13
A solution of copper(II) sulfate can be electrolysed using copper electrodes or carbon electrodes. Which statements are correct? 1 Using copper electrodes, oxygen gas forms at the anode. 2 Using copper electrodes, copper atoms lose electrons at the anode. 3 …
- Question 14
The equation for the combustion of hydrazine, N2H4, is shown. …
- Question 15
Dissolving ammonium chloride in water is an endothermic change. Which row shows the energy change and temperature change of the mixture during the dissolving of ammonium chloride? energy change temperature change A energy is absorbed decrease B energy is absorbed …
- Question 16
Aqueous sodium thiosulfate, Na2S2O3, reacts with dilute hydrochloric acid to form a yellow precipitate of sulfur. Na2S2O3(aq) + 2HCl (aq) 2NaCl (aq) …
- Question 17
Which statement about the conditions used in the Haber process and in the Contact process is correct? A The typical pressure used in the Haber process is similar to that used in the Contact process. B The typical temperature used …
- Question 18
The equation shows the equilibrium between dinitrogen tetroxide, N2O4, and nitrogen dioxide, NO2. The colours of the reactant and product are shown. N2O4(g) 2NO2(g) colourless brown The forward reaction is endothermic. Which statement is not correct? A At equilibrium, the …
- Question 19
What is the oxidation number of chromium in the Cr2O7 2– ion? …
- Question 20
Which method is used to prepare a pure, dry sample of lead(II) chloride? A mix aqueous lead(II) nitrate and dilute hydrochloric acid filter crystallise and dry the filtrate B mix aqueous lead(II) nitrate and dilute hydrochloric acid …
- Question 21
Phosphorus is an element in Group V of the Periodic Table. It burns in air to form an oxide that dissolves in water to form a solution with a pH of 1. Which row describes this oxide of phosphorus? metal …
- Question 22
The equation shows the reaction between aqueous hydrogen bromide and aqueous ammonia. HBr(aq) + NH3(aq) NH4 +(aq) + Br –(aq) Which statement describes the role of aqueous hydrogen bromide? A It is a catalyst. B It is a reducing …
- Question 23
Which statement about the elements in Group I is correct? A Hydrogen is produced when Group I elements react with water. B Ions of Group I elements have a 1– charge. C Sodium is more reactive than potassium. D Solid …
- Question 24
Which row describes the colour and state of iodine at room temperature and pressure? colour state A green liquid B grey-black solid C purple solid D red-brown liquid
- Question 25
Part of the Periodic Table is shown. Which element is an inert gas? …
- Question 26
Four different metals are separately added to water. The oxide of each metal is separately heated with carbon. The results are shown. metal metal with water metal oxide with carbon Q no reaction brown solid forms R rapid fizzing no …
- Question 27
An iron nail is fully covered with zinc to prevent it from rusting. Which row describes this method of protection and explains why zinc is used to protect the iron nail? method of protection reason zinc is used A barrier …
- Question 28
Iron is extracted from hematite in the blast furnace. Which reaction increases the temperature in the blast furnace to over …
- Question 29
Aluminium is extracted by the electrolysis of purified bauxite. Which row shows the half-equations at the electrodes and explains why one of the electrodes has to be replaced regularly? half-equation at anode half-equation at cathode electrode replacement …
- Question 30
Which flow chart describes the correct treatment sequence of the domestic water supply? A filtration chlorination sedimentation B sedimentation chlorination filtration C chlorination filtration sedimentation D sedimentation filtration chlorination
- Question 31
Which statement about oxides of nitrogen is correct? A They are made in car engines by the incomplete combustion of gasoline at a high temperature. B They are made in car engines when nitrogen in gasoline reacts with oxygen in …
- Question 32
The alkenes are a homologous series. Which statement about the members of the homologous series of the alkenes is correct? A They have the same functional group. B They have the same relative molecular mass. C They have different chemical …
- Question 33
The diagram represents two processes, X and Y, and their effect, Z, in increasing global warming. emission of thermal energy from the Earth …
- Question 34
Which structures are structural isomers of each other? …
- Question 35
The structure of an ester is shown. …
- Question 36
Which row shows the products obtained by the cracking of a large alkane? alkene hydrogen water …
- Question 37
Ethanol is produced by the fermentation of aqueous glucose or by the catalytic addition of steam to ethene. Which row shows some advantages and disadvantages of these processes? fermentation of aqueous glucose catalytic addition of steam to ethene advantage disadvantage …
- Question 38
Propenoic acid is an organic compound that is both an alkene and a carboxylic acid. The structure of propenoic acid is shown. …
- Question 39
Which item of apparatus is used to measure 13.7 cm3 of dilute hydrochloric acid? A a balance B a burette C a conical flask D a volumetric pipette
- Question 40
Chromatography is used to separate and analyse mixtures of soluble substances. The first steps of the process are listed. ● apply sample to baseline ● develop chromatogram in solvent What is the next step in the process to detect soluble …
Other Chemistry papers from Oct/Nov 2025
- 0620/11 Multiple choice (Core)
- 0620/12 Multiple choice (Core)
- 0620/13 Multiple choice (Core)
- 0620/21 Multiple choice (Extended)
- 0620/23 Multiple choice (Extended)
- 0620/31 Theory (Core)
- 0620/32 Theory (Core)
- 0620/33 Theory (Core)
- 0620/41 Theory (Extended)
- 0620/42 Theory (Extended)
- 0620/43 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical