Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/22 May/June 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 2, May/June 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
- 29
File names: 0620_s25_qp_22 · 0620_s25_ms_22
Grade thresholds for 0620/22 May/June 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 |
|---|---|---|---|---|---|---|
| 29 | 24 | 20 | 18 | 16 | 14 | 12 |
Topics in this paper
Which syllabus chapters 0620/22 May/June 2025 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/22 May/June 2025
- Question 1
An ice cube melts. ice cube pool of water What happens to the molecules of water in the ice cube? A They evaporate. B They dissolve. C They gain energy. D They lose energy.
- Question 2
A sample of a liquid, X, is heated to a temperature above its boiling point. X is then cooled, so that it condenses and then freezes. Which graph describes the change in temperature of X over time? temperature / °C …
- Question 3
Which row gives the number of protons, electrons and neutrons in an atom of zinc? protons electrons neutrons …
- Question 4
Which particles have the electronic configuration 2,8,8? 1 an argon atom, Ar 2 an aluminium ion, Al …
- Question 5
A sample of element Q has two isotopes. Their relative masses and abundances are shown. relative mass of isotope abundance …
- Question 6
Which statement about silicon(IV) oxide, SiO2, is correct? A It conducts electricity because it contains delocalised electrons. B It has a giant covalent structure with each silicon atom bonded to four oxygen atoms. C It is a simple covalent molecule. …
- Question 7
When 65 g of zinc reacts with 32 g of sulfur, 97 g of zinc sulfide is produced. When 65 g of zinc reacts with 40 g of sulfur, the mass of zinc sulfide produced is still 97 g. Which …
- Question 8
Aluminium reacts with iron(III) oxide to form aluminium oxide and iron. Which chemical equation for the reaction between aluminium and iron(III) oxide is correct? A Al + FeO Al O + Fe B 2Al + Fe2O Al 2O …
- Question 9
The concentration of a solution of aqueous sodium hydroxide is 0.50 mol / dm3. Which mass of sodium hydroxide is used to make 500 cm3 of this solution? …
- Question 10
Molten zinc oxide is electrolysed using inert electrodes. Which row identifies the product at each electrode? anode cathode A zinc oxygen B hydrogen oxygen C oxygen zinc D oxygen hydrogen
- Question 11
Dilute aqueous sodium chloride is electrolysed using platinum electrodes. What is the half-equation for the reaction at the cathode? …
- Question 12
Hydrogen–oxygen fuel cells can be used to power vehicles. Which statement about hydrogen–oxygen fuel cells is correct? A The equation for the overall reaction is …
- Question 13
A reaction pathway diagram is shown. reactants products energy progress of reaction Which row identifies the type of reaction and how the temperature of the surroundings changes during the reaction? type of reaction temperature of the surroundings A endothermic decreases …
- Question 14
The average bond energy for the C–H bond is 413 kJ / mol. What is the enthalpy change when 1.0 mol of methane molecules is formed from carbon and hydrogen atoms? A –1652 kJ …
- Question 15
Which statement describes the effect of adding a catalyst to a chemical reaction? A The activation energy, Ea, of the reaction is increased. B The enthalpy change, H, of the reaction stays unchanged. C The frequency of collisions between the …
- Question 16
Which row describes the conditions used in the manufacture of sulfuric acid by the Contact process? catalyst pressure temperature A iron high high B iron low low C vanadium(V) oxide high low D vanadium(V) oxide low high
- Question 17
Which equations show the underlined species acting as a reducing agent? 1 Fe2O3 + 3CO 2Fe + 3CO2 2 Fe + CuSO4 FeSO4 + Cu 3 5Fe2+ + MnO4 …
- Question 18
A farmer incorrectly adds two substances to the soil at the same time. They react together to form a gas which turns damp red litmus paper blue. What are the two substances? A a basic oxide and a potassium salt …
- Question 19
Which row shows the equations for the dissociation of hydrochloric acid and of ethanoic acid in aqueous solution? HCl (aq) H+(aq) + Cl –(aq) hydrochloric acid HCl (aq) H+(aq) + Cl –(aq) HCl (aq) H+(aq) + Cl –(aq) …
- Question 20
Which three oxides are all acidic? A CaO, NO2, SO2 B CaO, CO2, Na2O C CO2, NO2, SO2 D CO2, Na2O, SO2
- Question 21
The table shows some properties of noble gases. noble gas density in g / dm3 boiling point in °C helium 0.2 –269 neon 0.9 –246 argon 1.8 –186 krypton xenon 5.9 –108 Which row predicts the density and the boiling …
- Question 22
Sodium is a Group I metal. What is a physical property of sodium? A non-conductor of electricity B high melting point C high density D malleable
- Question 23
Tennessine (atomic number 117) is a manufactured element that is below astatine in Group VII of the Periodic Table. What is the expected state of tennessine at room temperature and pressure? A a diatomic gas B a liquid C a …
- Question 24
When chlorine is bubbled into aqueous sodium bromide, a displacement reaction occurs. Which description of this reaction is correct? A Chloride displaces bromide. B Chlorine displaces bromine. C Chloride displaces bromine. D Chlorine displaces bromide.
- Question 25
Brass is an alloy of copper. Which statement about brass or copper is correct? A Brass does not conduct electricity because it is a compound. B Copper conducts electricity because its atoms are free to move. C Brass is harder …
- Question 26
The ionic equations for some reactions between metals and aqueous metal ions are shown. Cu + 2Ag+ 2Ag + Cu2+ Mg + Zn2+ Mg2+ + Zn Zn + Cu2+ Cu + Zn2+ Sn + Cu2+ Sn2+ …
- Question 27
Zinc is used to galvanise iron to prevent it from rusting. Which statements are correct? 1 Galvanising is an example of a barrier method. 2 If the zinc is scratched, the iron will rust very quickly. 3 Galvanising is an …
- Question 28
Which equation represents a reaction that occurs in a blast furnace during the extraction of iron from hematite? A Ca + CO2 CaO + CO B Fe2O3 + 3Ca 2Fe + 3CaO C Ca(OH)2 CaO …
- Question 29
Water is added separately to anhydrous copper(II) sulfate and to anhydrous cobalt(II) chloride. Which row shows the colour changes? anhydrous copper(II) sulfate anhydrous cobalt(II) chloride A blue to white blue to pink B blue to white pink to blue C …
- Question 30
Gases which cause acid rain form in car engines. These gases can be removed using a catalytic converter. Which equation represents the removal of one of these gases using a catalytic converter? A CO2 …
- Question 31
Which statements about carbon dioxide are correct? 1 Carbon dioxide absorbs thermal energy from the Earth. 2 Carbon dioxide increases the thermal energy loss to space. 3 The level of carbon dioxide in the atmosphere has increased due to the …
- Question 32
What is the structural formula of butan-2-ol? A CH3CH2CH2OH B CH3CH(OH)CH3 C CH3CH2CH2CH2OH D CH3CH2CH(OH)CH3
- Question 33
Methanol reacts with ethanoic acid to form an ester. What is the displayed formula for this ester? …
- Question 34
Petroleum can be separated into useful fractions by fractional distillation. Which row shows a correct use of the named fraction? fraction use A bitumen lubricant B naphtha fuel for home heating C kerosene jet fuel D refinery gas making chemicals
- Question 35
Ethane reacts with chlorine in the presence of ultraviolet light. Which products are formed? A Cl CH2CH2Cl and H2 B 2CH3Cl and H2 C C2H5Cl and HCl D CH2=CH2 and 2HCl
- Question 36
Ethanol can be made by the fermentation of aqueous glucose and by the catalytic addition of steam to ethene. What are two advantages of making ethanol by the catalytic addition of steam to ethene rather than by the fermentation of …
- Question 37
The structure of a polymer repeat unit is shown. …
- Question 38
Which item of apparatus is used to measure exactly 26.3 cm3 of a liquid? …
- Question 39
A mixture containing an aqueous salt and an insoluble salt is filtered. X Y Which row describes X and …
- Question 40
Pure ethanol has a melting point of –114 °C and a boiling point of 78 °C. What are the melting and boiling points of a sample of ethanol with glucose dissolved in it? melting point / °C boiling point …
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