Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/23 Oct/Nov 2022 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 3, 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
- 27
File names: 0620_w22_qp_23 · 0620_w22_ms_23
Grade thresholds for 0620/23 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 |
|---|---|---|---|---|---|---|
| 27 | 23 | 19 | 17 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/23 Oct/Nov 2022 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/23 Oct/Nov 2022
- Question 1
Which gas diffuses the most slowly? A CH4 B CO2 …
- Question 2
The chromatogram from four different substances is shown. Which pure substance has the largest Rf value? …
- Question 3
The structure of sodium chloride can be represented as shown. X Y What are X and …
- Question 4
Which two particles have the same electronic structure? A C and …
- Question 5
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 6
What is the total number of shared electrons in a molecule of methanol, CH3OH? …
- Question 7
Which row about the structures and uses of diamond and graphite is correct? structure use A diamond has a giant covalent structure diamond is used to make electrodes B diamond has a simple covalent structure diamond is used to make …
- Question 8
Caffeine is a stimulant found in coffee. …
- Question 9
The equation for the reaction between hydrogen sulfide, H2S, and oxygen is shown. …
- Question 10
Which apparatus is used to plate a nickel object with silver? silver nitrate solution nickel object A silver + – silver nitrate solution silver B nickel object + – nickel nitrate solution nickel object C silver + – nickel nitrate …
- 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
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 14
Dilute hydrochloric acid is reacted with excess calcium carbonate and the total volume of gas is measured at regular intervals. The results are shown by line W on the graph. The experiment is repeated but with one change. The results …
- Question 15
When hydrated copper(II) sulfate is heated, it produces white copper(II) sulfate. When water is added, the white copper(II) sulfate turns blue. Which type of reaction is shown by these observations? A decomposition B displacement C redox D reversible
- 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 equation for the reaction between ethene and hydrogen is shown. CH2=CH2(g) …
- 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
Tests are done on an aqueous solution. test a few drops of aqueous sodium hydroxide are added aqueous sodium hydroxide is added in excess observation white precipitate precipitate dissolves to give a colourless solution Which cations produce these observations? 1 …
- Question 20
Ammonia, NH3, dissolves in water to form a dilute solution of ammonium hydroxide, NH4OH. The reaction is reversible and exists as an equilibrium mixture. NH3(g) + H2O(l) NH4 +(aq) + OH–(aq) Which statement about the mixture is correct? A All …
- Question 21
Elements E and F are in Group I of the Periodic Table. E has a higher melting point than F. Elements J and L are in Group VII of the Periodic Table. J has a higher density than L. Which …
- Question 22
Which metal forms ions with one oxidation state? A aluminium B chromium C copper D iron
- Question 23
How does the nature of the oxides change across Period 3 from sodium to chlorine? A basic amphoteric acidic B basic acidic amphoteric C amphoteric basic acidic D acidic amphoteric basic
- Question 24
Zinc is a metal with a boiling point of 907 C. Two methods of making zinc are shown. zinc ore zinc oxide zinc zinc zinc sulfate solution method 1 method 2 dissolve in dilute sulfuric acid heat with carbon at …
- Question 25
Which statement about the reactions of metals is correct? A Iron and carbon dioxide are produced when iron(III) oxide is heated with carbon. B Magnesium reacts with dilute hydrochloric acid producing hydrogen and chlorine. C Potassium reacts vigorously with water …
- Question 26
12.4 g of copper(II) carbonate is heated in a test-tube. Only 50% is decomposed. [Mr: CuCO3, 124; CuO, 80] What will be the final mass of the substances in the test-tube? …
- Question 27
Which statement about the manufacture of ammonia is correct? A Ammonia is manufactured by heating hydrogen and nitrogen at 50 C and 1.0 atm. B Ammonia is obtained by heating hydrogen and nitrogen in the Contact process. C Hydrogen for …
- 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
Petrol-fuelled cars produce oxides of nitrogen. Which statement explains how oxides of nitrogen are formed? A In the catalytic converter, the elements nitrogen and oxygen combine. B Oxygen and nitrogen compounds in petrol combine in the car engine. C The …
- 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 ethyl butanoate? A CH3CH2CH2COOCH2CH3 B CH3COOCH2CH2CH2CH3 C CH3CH2CH2CH2COOCH2CH3 D CH3CH2COOCH2CH2CH2CH3
- Question 35
Methanol, CH3OH, is a member of the homologous series of alcohols. What is the formula of the alcohol in the same homologous series which contains three carbon atoms? A C3H5OH B C3H6OH C C3H7OH D C3H8OH
- Question 36
Which type of compound reacts with hydrogen in an addition reaction? A alkanes B alkenes C alcohols D carboxylic acids
- Question 37
The equation for the reaction between methane and chlorine is shown. CH4 + 4Cl 2 CCl 4 + 4HCl Which type of reaction does methane undergo? A substitution B reduction C condensation D addition
- Question 38
Which functional groups form an amide linkage? A H2N– and –COOH B H2N– and H2N– C –OH and –COOH D –OH and H2N–
- Question 39
The structure of propene is shown. …
- Question 40
The equation shows the formation of a polymer called Kevlar. HOOC COOH …
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