Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/21 Oct/Nov 2022 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 1, Oct/Nov 2022: 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
- 26
File names: 0620_w22_qp_21 · 0620_w22_ms_21
Grade thresholds for 0620/21 Oct/Nov 2022
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 |
|---|---|---|---|---|---|---|
| 26 | 22 | 18 | 16 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/21 Oct/Nov 2022 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/21 Oct/Nov 2022
- Question 1
The diagram shows the changes of state between a solid, a liquid and a gas. solid 1 3 liquid gas 2 4 In which changes of state is energy being given out? A 1 and …
- Question 2
A coloured dye is separated by chromatography. One component of the dye moves a distance of 13 cm and has an Rf value of 0.86. Which distance did the solvent front move? A 6.6 cm B 11.9 cm C 15.1 …
- Question 3
A mixture contains salt, sand and sulfur. Salt dissolves in water but not in xylene. Sulfur dissolves in xylene but not in water. Sand does not dissolve in water or xylene. What is the order of the processes used to …
- Question 4
Which statements about isotopes of the same element are correct? 1 They are atoms which have the same chemical properties because they have the same number of electrons in their outer shell. 2 They are atoms which have the same …
- Question 5
Which type of structure and bonding is present in an element that is malleable and conducts electricity? A covalent molecular B ionic lattice C covalent macromolecular D metallic lattice
- Question 6
Which statements about potassium bromide are correct? 1 It has a high melting point. 2 It dissolves in water. 3 It conducts electricity when solid. A 1 and …
- Question 7
Which substance has a similar structure to silicon(IV) oxide? A carbon dioxide B diamond C graphite D sodium oxide
- Question 8
Caffeine is a stimulant found in coffee. …
- Question 9
4.55 g of zinc is reacted with 50 cm3 of 2.25 mol / dm3 dilute hydrochloric acid. The equation for the reaction is shown. Zn + 2HCl ZnCl …
- Question 10
In the electrolysis diagram, oxidation is occurring at electrode 1 and reduction at electrode 2. battery electrode 1 electrode 2 electrolyte Which row shows the directions of movement of the electrons in the external circuit and of the positive ions …
- Question 11
When an acid is added to an alkali, the temperature of the reaction mixture rises. Which words describe this reaction? A decomposition and endothermic B decomposition and exothermic C neutralisation and endothermic D neutralisation and exothermic
- Question 12
Some properties of four fuels are shown. Which fuel is a gas at room temperature and makes two products when it burns in a plentiful supply of air? fuel formula melting point / C boiling point …
- Question 13
Ethene can undergo complete combustion, as shown. …
- Question 14
A student adds excess zinc to dilute hydrochloric acid at 25 C. The hydrogen gas produced is collected and measured at room temperature and pressure. The results are plotted and labelled as curve X on the graph. The experiment is …
- Question 15
Dinitrogen tetroxide, N2O4, is converted into nitrogen dioxide, NO2, in a reversible reaction. N2O4(g) 2NO2(g) The forward reaction is endothermic. Which conditions give the highest equilibrium yield of nitrogen dioxide? pressure / atmospheres temperature A 2 high B 2 low …
- Question 16
When magnesium is heated with zinc oxide a reaction occurs. The equation is shown. Mg + ZnO MgO + Zn Which substance is oxidised? A magnesium B magnesium oxide C zinc D zinc oxide
- Question 17
The diagram shows an experiment. aqueous P tap solid Q A small volume of aqueous P is poured on to solid Q and the tap of the funnel closed. Which pairs of substances cause the syringe to fill with gas? …
- Question 18
Ethanoic acid reacts with water to produce an acidic solution. Which row describes the roles of ethanoic acid and water in this reaction? ethanoic acid water A accepts a proton donates a proton B accepts an electron donates an electron …
- Question 19
Aqueous ammonium sulfate is made by reacting aqueous ammonia with dilute sulfuric acid. How is solid ammonium sulfate obtained from the resulting solution? A crystallisation B distillation C filtration D solvent extraction
- Question 20
Carbon forms two oxides: carbon monoxide, CO, and carbon dioxide, CO2. Which row describes these two oxides? CO CO2 A acidic acidic B acidic neutral C neutral acidic D neutral neutral
- Question 21
Group II elements show the same trends as Group I elements. Which statement about elements in Group II is correct? A The melting point of barium is higher than the melting point of calcium. B Barium is more reactive than …
- Question 22
Some information about properties of Group I elements is shown. element melting point / C density in g / cm3 lithium 181 0.53 sodium 98 0.97 potassium X rubidium Y Z What are the values for X, Y and …
- Question 23
Which statements describe properties of transition elements? 1 They form coloured compounds. 2 They have variable oxidation states. 3 They have low densities. 4 They are volatile. A 1 and …
- Question 24
Which statement about the extraction of aluminium by electrolysis is correct? A Aluminium is extracted from its ore, cryolite. B Aluminium is formed at the positive electrode. C Bauxite is used to lower the temperature of the extraction process. D …
- Question 25
Copper(II) nitrate and zinc carbonate are heated strongly in separate test-tubes. Which row identifies the gases produced? copper(II) nitrate zinc carbonate A oxygen and nitrogen dioxide carbon dioxide only B oxygen and nitrogen dioxide carbon dioxide and oxygen C nitrogen …
- Question 26
Iron from a blast furnace can be converted to steel. Which statements about steel are correct? 1 Steel contains more carbon than the iron obtained from the blast furnace. 2 Steel is produced by blowing oxygen through the iron. 3 …
- Question 27
Which metal is used to galvanise steel? A copper B lead C tin D zinc
- Question 28
The diagram shows a stage in the purification of dirty water. coarse gravel fine gravel sand dirty water pot with holes in bottom Which process does this apparatus show? A chlorination B condensation C distillation D filtration
- Question 29
Which substance in polluted air damages stonework and kills trees? A carbon dioxide B carbon monoxide C lead compounds D sulfur dioxide
- Question 30
Which row explains why a high temperature and an iron catalyst are used in the manufacture of ammonia by the Haber process? high temperature iron catalyst A increases the rate of the reaction increases the equilibrium yield of ammonia B …
- Question 31
The scheme shows four stages in the conversion of sulfur to sulfuric acid. In which stage is a catalyst used? oleum air air water sulfur sulfur dioxide sulfur trioxide concentrated sulfuric acid concentrated sulfuric acid stage B stage D stage …
- Question 32
Which element has an oxide that is used as a food preservative? A helium B hydrogen C iron D sulfur
- Question 33
Which substance gives off carbon dioxide on heating? A lime B limestone C limewater D slaked lime
- Question 34
Which formula represents ethanol? A CH3CH3 B CH2CH2 C CH3CH2OH D CH3COOH
- Question 35
Which statement about structural isomers is correct? A They have the same structure but different reactivity. B They have the same general formula but a different number of carbon atoms in their molecules. C They have the same structure but …
- Question 36
Which formula is the same in methanol, ethanol and propanol? A empirical formula B general formula C molecular formula D structural formula
- Question 37
Ethene reacts with water under suitable conditions. Which statement about this reaction is correct? A The product of this reaction has an Mr of 46. B The reaction produces two different products. C The reaction occurs when ethene gas is …
- Question 38
Ethanoic acid is made by reacting ethanol with acidified potassium manganate(VII). Which type of reaction occurs when ethanol reacts with acidified potassium manganate(VII)? A displacement B fermentation C oxidation D neutralisation
- Question 39
Which structure represents Terylene? …
- Question 40
The equation shows the formation of a polymer called Kevlar. HOOC COOH …
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