Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/22 Feb/March 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 2, Feb/March 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
- 32
File names: 0620_m25_qp_22 · 0620_m25_ms_22
Grade thresholds for 0620/22 Feb/March 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 |
|---|---|---|---|---|---|---|
| 32 | 25 | 19 | 17 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/22 Feb/March 2025 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/22 Feb/March 2025
- Question 1
The diagrams show containers of gas at the same temperature. All containers have the same size. Which container contains gas at the highest pressure? …
- Question 2
A cooling curve for a substance is shown. temperature time …
- Question 3
Samples of four gases are released in a room at the same time. The gases are carbon dioxide, CO2, hydrogen chloride, HCl, hydrogen sulfide, H2S, and nitrogen dioxide, NO2. Which gas diffuses fastest? A carbon dioxide B hydrogen chloride C …
- Question 4
Sulfur atoms can form the negative ion S2–. Three other atoms or ions are listed. ● argon, Ar ● calcium, Ca ● oxide, O2– How many of these atoms or ions have the same electronic configuration as …
- Question 5
- Question 6
Lithium is in Group I of the Periodic Table. Nitrogen is in Group V of the Periodic Table. Lithium reacts with nitrogen to form the ionic compound lithium nitride, Li3N. What happens to the electrons when lithium atoms and nitrogen …
- Question 7
For which covalent compound does the dot-and-cross diagram correctly show the outer shell electrons? H Cl A H Cl …
- Question 8
Which row identifies the positive and the negative particles present in a giant metallic lattice? positive particles negative particles A anions cations B anions delocalised electrons C cations anions D cations delocalised electrons
- Question 9
Which formula for the named compound is correct? A calcium oxide, CaO B cobalt(II) chloride, Co2Cl C sulfur dioxide, S2O2 D anhydrous copper(II) sulfate, Cu(SO4)2
- Question 10
The equation for the reaction of magnesium with dilute sulfuric acid is shown. Mg + H2SO4 MgSO4 + H2 [Mr: MgSO4, 120] Which mass of magnesium sulfate is formed when 12 g of magnesium completely reacts with dilute sulfuric …
- Question 11
An organic compound, Q, contains carbon, hydrogen and oxygen only. Q contains 40.0% carbon and 6.7% hydrogen by mass. What is the empirical formula of Q? A CHO B CH2O C C2HO2 D C3H6O3
- Question 12
The value of the Avogadro constant is …
- Question 13
Three aqueous solutions, L, M and N, are electrolysed using inert electrodes. L is concentrated hydrochloric acid. M is concentrated aqueous sodium chloride. N is dilute aqueous sodium chloride. Which solutions produce a pale yellow-green gas at the anode? A …
- Question 14
Dilute sulfuric acid is electrolysed using inert electrodes. What are the ionic half-equations for the reactions that take place at each electrode? positive electrode negative electrode …
- Question 15
Which statements about hydrogen–oxygen fuel cells are correct? 1 They convert chemical energy into electrical energy. 2 Hydrogen is reduced in the fuel cells. 3 They do not produce any atmospheric pollutants. …
- Question 16
The reaction pathway diagram for the reaction between P and Q to form R and S is shown. Which letter represents the enthalpy change for the reaction? energy progress of reaction …
- Question 17
The equation for the complete combustion of methane is shown. CH4(g) …
- Question 18
Which change is a physical change? A cracking an alkane B evaporating ethanol C fermenting glucose D neutralising an acid
- Question 19
Which statements explain why increasing the temperature in a reaction involving gases increases the rate of reaction? 1 It increases the collision frequency between the gas particles. 2 It lowers the activation energy. 3 It increases the kinetic energy of …
- Question 20
The equation for the reaction between ammonia and oxygen is shown. 4NH3(g) + 5O2(g) 4NO(g) …
- Question 21
Mercury(II) oxide, HgO, decomposes when heated. The equation is shown. 2HgO 2Hg + O2 Why is this a reduction reaction? A The products weigh less than the reactants. B There are fewer reactants than products. C There is a …
- Question 22
Some information about two dilute acids is shown. dilute acid acid concentration in mol / dm3 pH nitric acid 0.1 1.0 propanoic acid 0.4 2.6 Three statements about the acids are listed. 1 Nitric acid has a lower pH because …
- Question 23
Element E is a metal in Group I of the Periodic Table and element G is a non-metal in Group VII. Both of these elements form oxides. Which statement about their oxides is correct? A Both oxides are acidic. B …
- Question 24
Lead(II) sulfate is an insoluble salt. Which method is suitable for obtaining pure solid lead(II) sulfate? A Mix aqueous lead(II) nitrate and aqueous potassium sulfate, heat to evaporate all of the water, collect the solid and then wash and dry …
- Question 25
The elements oxygen and sulfur are in the same group of the Periodic Table. Which statement about oxygen and sulfur is not correct? A They are non-metals. B They have giant covalent structures. C They have six electrons in the …
- Question 26
Tennessine, Ts, is at the bottom of Group VII of the Periodic Table. What are the predicted properties of tennessine at room temperature? A a black solid, more dense than iodine B a black solid, more reactive than iodine C …
- Question 27
An example of sacrificial protection is the fitting of zinc blocks to the outside of a ship’s steel hull. Which statement explains why zinc is used to protect the iron in the steel from rusting? A Zinc is more reactive …
- Question 28
Which statement about alloys is correct? A Alloys are harder than pure metals because they contain strong intermolecular forces. B Brass is an alloy containing mainly copper and tin. C The different-sized atoms in an alloy mean that the layers …
- Question 29
Separate pieces of aluminium foil and copper foil are heated in air. The copper foil reacts to give a black solid. The aluminium foil does not react. Which statement explains these observations? A Aluminium has an unreactive layer, but copper …
- Question 30
Which row gives the symbol equation for the formation of carbon monoxide and for the reduction of iron(III) oxide in a blast furnace? equation for the formation of carbon monoxide equation for the reduction of iron(III) oxide …
- Question 31
A sample of river water contains a high concentration of nitrates from fertilisers. Which statements about the river water are correct? 1 It has a boiling point of …
- Question 32
Which statements about the treatment of domestic water supplies are correct? 1 The water undergoes sedimentation to remove dissolved solids. 2 The water is filtered to remove insoluble solids. 3 The water is treated with carbon to improve the taste. …
- Question 33
An experiment to find the percentage of oxygen in 150 cm3 of polluted air is shown. water damp iron wool measuring cylinder 150 cm3 of polluted air The apparatus is left for one week. After this time, the volume of …
- Question 34
Nitrogen monoxide, NO, and carbon monoxide, CO, are both removed from the exhaust gases of a car by a catalytic converter. Which statement describes how nitrogen monoxide and carbon monoxide are removed by a catalytic converter? A Nitrogen monoxide and …
- Question 35
Propan-1-ol is oxidised by acidified aqueous potassium manganate(VII) in a similar way to ethanol. Which compound is produced by the oxidation of propan-1-ol with acidified aqueous potassium manganate(VII)? A CH3CH2OH B CH3CH2CH2OH C CH3COOH D CH3CH2COOH
- Question 36
The structural formula of methyl propane is CH3CH(CH3)CH3. The equation represents the reaction of methyl propane with chlorine. C4H10 + Cl 2 C4H9Cl + HCl How many structural isomers with the molecular formula C4H9Cl can be formed from this …
- Question 37
Which statements describe disadvantages of manufacturing ethanol by fermentation? 1 The process uses a renewable resource. 2 The process produces impure ethanol. 3 The process requires a high temperature. 4 The process is slow. A 1 and …
- Question 38
Nylon is made in a polymerisation reaction. Which row describes the type of polymerisation and identifies the other product of the reaction? type of polymerisation other product A addition water B addition none C condensation water D condensation none
- Question 39
Which ion forms a green precipitate with aqueous sodium hydroxide that dissolves in an excess of aqueous sodium hydroxide? A Ca2+ B Cr3+ C Cu2+ D Fe2+
- Question 40
A mixture of soluble substances can be separated by paper chromatography. Each substance can be identified using its Rf value. Which formula shows how the Rf value is calculated? A Rf = substance by travelled distance solvent by travelled distance …
Other Chemistry papers from Feb/March 2025
- 0620/12 Multiple choice (Core)
- 0620/32 Theory (Core)
- 0620/42 Theory (Extended)
- 0620/62 Alternative to Practical