Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/22 May/June 2021 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 2, May/June 2021: 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_s21_qp_22 · 0620_s21_ms_22
Grade thresholds for 0620/22 May/June 2021
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 | 21 | 16 | 14 | 13 | 12 | 11 |
Topics in this paper
Which syllabus chapters 0620/22 May/June 2021 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/22 May/June 2021
- Question 1
A gas is released at point P in the apparatus shown. P damp universal indicator paper Which gas turns the damp universal indicator paper red most quickly? A ammonia, NH3 B chlorine, Cl 2 C hydrogen chloride, HCl D sulfur …
- Question 2
A mixture of colourless compounds is separated using chromatography. Which type of reagent is used to detect these compounds after separation? A a dehydrating agent B a locating agent C an oxidising agent D a reducing agent
- Question 3
Which statement about paper chromatography is correct? A A solvent is needed to dissolve the paper. B Paper chromatography separates mixtures of solvents. C The solvent should cover the baseline. D The baseline should be drawn in pencil.
- Question 4
Element X has 7 protons. Element Y has 8 more protons than X. Which statement about element Y is correct? A Y has more electron shells than …
- Question 5
A covalent molecule Q contains only six shared electrons. What is Q? A ammonia, NH3 B chlorine, Cl 2 C methane, CH4 D water, H2O
- Question 6
Information about four substances …
- Question 7
Chemical compounds formed from a Group I element and a Group VII element contain ionic bonds. How are the ionic bonds formed? A Electrons are transferred from Group VII atoms to Group I atoms. B Electrons are shared between Group …
- Question 8
Some information about particles …
- Question 9
Chlorine gas will react with iron metal. Exactly 21.3 g of chlorine reacts with 11.2 g of iron. How many iron atoms react with 30 molecules of chlorine? …
- Question 10
In separate experiments, electricity was passed through concentrated aqueous sodium chloride and molten lead(II) bromide. What would happen in both experiments? A A halogen would be formed at the anode. B A metal would be formed at the cathode. C …
- Question 11
A reaction involving aluminium is shown. xAl + yO2 …
- Question 12
Four different fuels are used to heat a beaker of water, for the same amount of time, using the apparatus shown. stirrer spirit burner fuel screen to reduce draughts thermometer 200 g of water The initial temperature of the water …
- Question 13
An excess of calcium carbonate reacts with dilute hydrochloric acid. The volume of carbon dioxide produced is measured at regular time intervals. The results are shown as experiment 1. The experiment is repeated with only one change to the reaction …
- Question 14
When sulfur is heated it undergoes a 1 change as it melts. Further heating causes the sulfur to undergo a 2 change and form sulfur dioxide. Which words complete gaps 1 and …
- Question 15
Four statements about the effect of increasing temperature on a reaction are shown. 1 The activation energy becomes lower. 2 The particles move faster. 3 There are more collisions between reacting particles per second. 4 There are more collisions which …
- Question 16
An example of a redox reaction is shown. Zn + Cu2+ Zn2+ + Cu Which statement about the reaction is correct? A Zn is the oxidising agent and it oxidises Cu2+. B Zn is the oxidising agent and it …
- Question 17
When bismuth(III) chloride, BiCl 3, reacts with water, a white precipitate of bismuth(III) oxychloride, BiOCl, is formed. The equation for the reaction is shown. BiCl 3(aq) + H2O(l) BiOCl (s) + 2H+(aq) + 2Cl –(aq) The reaction is in equilibrium. …
- Question 18
Element X forms an oxide, XO, that neutralises sulfuric acid. Which row describes X and XO? element X nature of oxide, XO A metal acidic B metal basic C non-metal acidic D non-metal basic
- Question 19
Information about the solubility of salts is shown. salt solubility chlorides soluble (except for lead(II) chloride and silver chloride) nitrates soluble sulfates soluble (except for barium sulfate and lead(II) sulfate) Aqueous solutions of which two compounds would produce a precipitate …
- Question 20
The equation shows the reaction between hydrogen and oxygen. …
- Question 21
Burning fossil fuels releases sulfur dioxide which leads to acid rain. Which ion in the rain water causes it to be acidic? …
- Question 22
Which statement about the trends shown by the elements of Period 3 in the Periodic Table is not correct? A The elements become less metallic across the period. B The group number increases across the period. C The number of …
- Question 23
The diagram shows the positions of elements …
- Question 24
When aqueous iodine is added to a solution of vanadium ions, V2+, the V2+ ions each lose one electron. Which property of transition elements is shown by this reaction? A Transition elements have variable oxidation states. B Transition elements form …
- Question 25
A piece of aluminium is dropped into dilute hydrochloric acid. No immediate reaction is observed. Which statement explains this observation? A Aluminium does not neutralise acids. B Aluminium is a non-metal so does not react with acids. C Aluminium is …
- Question 26
Some metal nitrates and carbonates decompose when heated strongly. Metal Q has a nitrate that decomposes to give a salt and a colourless gas only. The carbonate of metal Q does not decompose when heated with a Bunsen burner. What …
- Question 27
Aluminium is extracted from its ore by electrolysis. Which equation represents the reaction that occurs at the anode during the electrolysis? A Al …
- Question 28
Mild steel consists mostly of iron. Mild steel can be prevented from rusting by a process called galvanising. Copper is not a very strong metal, however if it is mixed with a suitable metal a strong alloy called brass is …
- Question 29
Water is used for the irrigation of crops and for drinking water. For which uses must water be chlorinated? irrigation drinking …
- Question 30
Which natural resource cannot provide a raw material for the manufacture of ammonia? A air B limestone C petroleum D water
- Question 31
Ammonia is made in the Haber process. Which conditions are used in the Haber process? temperature / C pressure / atmospheres catalyst used …
- Question 32
Which process in the carbon cycle is responsible for removing carbon dioxide from the atmosphere? A combustion B decomposition C photosynthesis D respiration
- Question 33
The equations represent two reactions, P and Q, of lime (calcium oxide). P CaO + SiO2 CaSiO3 Q CaO + SO2 CaSO3 In which processes do the reactions occur? …
- Question 34
Which statement about ethanol is not correct? A Ethanol can be made by fermentation. B Ethanol is oxidised to make ethanoic acid. C Ethanol reacts with oxygen exothermically, making it a good fuel. D Ethanol reacts with propanoic acid to …
- Question 35
Which pair of formulae represents two alkanes? A CH4 and …
- Question 36
Which statement about alkanes is correct? A They burn in oxygen. B They contain carbon, hydrogen and oxygen atoms. C They contain double bonds. D They contain ionic bonds.
- Question 37
Which statements about ethanoic acid are correct? 1 It is a strong acid. 2 It reacts with ethanol to form an ester. 3 It has the formula CH3COOH. A 1 and 2 only B 1 and 3 only C 2 …
- Question 38
The flow chart shows how petroleum may be turned into a plastic. petroleum plastic saturated hydrocarbon unsaturated hydrocarbon process 1 process 2 process 3 What are processes 1, 2 and 3? process 1 process 2 process 3 A cracking fractional …
- Question 39
The structure of a synthetic polymer is shown. …
- Question 40
Which substance is a natural polymer? A ethene B Terylene C nylon D protein Group The Periodic Table of Elements 1 H hydrogen 1 2 He helium 4 I II III IV V VI VII VIII 3 Li lithium 7 …
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