Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/22 Feb/March 2023 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 2, Feb/March 2023: 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
- 28
File names: 0620_m23_qp_22 · 0620_m23_ms_22
Grade thresholds for 0620/22 Feb/March 2023
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 |
|---|---|---|---|---|---|---|
| 28 | 24 | 21 | 18 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/22 Feb/March 2023 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/22 Feb/March 2023
- Question 1
Substance M is a solid at 30 C. The substance is heated to 80 C and its temperature measured as it cools down to room temperature. The cooling curve is shown. …
- Question 2
Which gas has the fastest rate of diffusion? A Ar …
- Question 3
There are two stable isotopes of bromine. The mass number of isotope 1 is 79. The mass number of isotope 2 is 81. Which statement is correct? A The isotopes have the same number of neutrons. B The isotopes have …
- Question 4
Which statement about ions and ionic bonds is correct? A Bromine atoms form negatively charged bromide ions. B Ionic bonds form between elements in Group VII of the Periodic Table. C Positive ions are formed when atoms lose protons. D …
- Question 5
Part of the Periodic Table is shown. F G Which type of chemical bonding is present in the oxide of F and in the oxide of G? oxide of F oxide of G A covalent covalent B covalent ionic C …
- Question 6
Elements X and Y react to form a compound. Element X loses two electrons and element Y gains one electron. What is the charge on the ions of elements X and Y and what is the formula of the compound? …
- Question 7
Which statement about graphite explains why it is used as an electrode? A It contains ions. B It has a giant covalent structure. C It is a metal. D It has mobile electrons.
- Question 8
Methane, CH4, burns in air to form carbon dioxide and water. What is the balanced equation for this reaction? A CH4(g) …
- Question 9
The equation for the thermal decomposition of sodium hydrogencarbonate is shown. 2NaHCO3 Na2CO3 …
- Question 10
An electrolysis experiment is done using carbon electrodes. Hydrogen and oxygen are formed at the electrodes. What is the electrolyte? A aqueous copper(II) sulfate B concentrated hydrochloric acid C dilute aqueous sodium chloride D molten potassium oxide
- Question 11
Concentrated aqueous copper(II) sulfate is electrolysed using copper electrodes. Which ionic half-equation describes the reaction taking place at the cathode? …
- Question 12
When powdered sodium carbonate and aqueous ethanoic acid are mixed, the temperature of the mixture falls. Which statement about this reaction is correct? A The reaction is endothermic and ∆H is negative. B The reaction is endothermic and ∆H is …
- Question 13
Magnesium powder reacts with an excess of dilute hydrochloric acid to produce hydrogen gas. Which statements about this reaction are correct? 1 The smaller the particles of magnesium powder, the more slowly the hydrogen is produced. 2 The higher the …
- Question 14
The reaction between two aqueous compounds, X and Y, is slow and exothermic. The graph shows how the rate of this reaction changes with time. 0 0 rate time A student suggests that the rate of reaction decreases with time …
- Question 15
Hydrogen reacts with iodine to form hydrogen iodide. …
- Question 16
Ammonium sulfate is used as a fertiliser. It is made from ammonia and sulfuric acid. The 1 is made by the 2 process in which 3 is used as a catalyst. Which words complete gaps 1, 2 and …
- Question 17
The reversible reaction shown takes place in a closed system at constant temperature. …
- Question 18
In which equation is the underlined substance acting as a reducing agent? A 3CO + Fe2O3 2Fe + 3CO2 B CO2 …
- Question 19
An aqueous solution reacts with a solid. The products are an alkaline gas, a salt and water. What are the aqueous solution and the solid? aqueous solution solid A sodium hydroxide magnesium carbonate B hydrochloric acid magnesium carbonate C hydrochloric …
- Question 20
Butanoic acid partially dissociates in aqueous solution. Which row about butanoic acid is correct? pH effect on thymolphthalein A 3 turns blue B 5 turns colourless C 8 turns blue D 10 turns colourless
- Question 21
Copper(II) sulfate is prepared by adding excess copper(II) carbonate to sulfuric acid. Why is an excess of copper(II) carbonate added? A to ensure all the copper(II) carbonate has reacted B to ensure all the sulfuric acid has reacted C to …
- Question 22
Part of the Periodic Table is shown. Which element has two electrons in its outer shell and three electron shells? …
- Question 23
Elements in Group I and Group II show the same trends in their reactions with water and in their density. Which row shows how the properties of barium compare with calcium? reaction with water density A faster higher B faster …
- Question 24
Which pair of compounds shows a transition element in two different oxidation states? A Cr2O3 and Cr2(SO4)3 B Cu2O and CuCO3 C ZnS and ZnSO4 D NiO and Ni(NO3)2
- Question 25
Which description of brass is correct? A a compound of copper and zinc B a compound of copper and tin C a mixture of copper and zinc D a mixture of copper and tin
- Question 26
What is the symbol of the metal used in the manufacture of aircraft because of its low density? A Al B Cu C Fe D Zn
- Question 27
Which substances react to form hydrogen gas? 1 calcium and water 2 silver and dilute hydrochloric acid 3 magnesium and steam 4 zinc and dilute hydrochloric acid …
- Question 28
Coke (carbon) and limestone are two raw materials used in the extraction of iron from hematite. Which type of reaction occurs when each substance is heated during the process? coke limestone A redox redox B redox thermal decomposition C thermal …
- Question 29
Some combustion reactions produce pollutant gases. Which reactions produce a pollutant gas that is not present in clean air? 1 2CH4 …
- Question 30
One mole of alkane Y produces 72 dm3 of carbon dioxide when burned in excess oxygen, measured at room temperature and pressure. What is Y? A butane B ethane C methane D propane
- Question 31
The structure of organic compound X is shown. …
- Question 32
What is the structural formula of the compound formed in the addition reaction of propene with bromine? A CH3CHBrCH2Br B CH2BrCH2CH2Br C CHBr2CH2CH3 D CH3CBr2CH3
- Question 33
Ethanol is produced industrially by fermentation and also by a catalysed addition reaction involving steam. Which row describes one advantage of each process? fermentation catalysed addition reaction involving steam A the reactant used is renewable it is a continuous process …
- Question 34
Carboxylic acids react with alcohols when warmed with an acid catalyst. Which type of substance is formed in this reaction? A an alkene B an ester C a salt D a polymer
- Question 35
Nylon is formed by condensation polymerisation. Which structure represents nylon? …
- Question 36
Which structure represents the repeat unit of the addition polymer formed from but-1-ene? …
- Question 37
2.00 g of powdered calcium carbonate is added to 50.0 cm3 of hydrochloric acid. Which apparatus is used to measure these quantities of calcium carbonate and hydrochloric acid? calcium carbonate hydrochloric acid A balance burette B balance thermometer C pipette …
- Question 38
The diagram shows a chromatogram obtained from the colours of three different sweets, X, Y and Z. sweet X red yellow sweet Y red yellow sweet Z red red yellow How many different red dyes are present in the sweets? …
- Question 39
A mixture contains sand and an aqueous solution of sodium chloride. Which processes are used to obtain a sample of solid sand and a sample of solid sodium chloride from the mixture? A crystallisation followed by filtration B evaporation followed …
- Question 40
A student tests an unknown compound M. The compound: ● produces a lilac flame using a flame test ● produces a gas which turns limewater cloudy when dilute hydrochloric acid is added. What is M? A sodium sulfate B sodium …
Other Chemistry papers from Feb/March 2023
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- 0620/32 Theory (Core)
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