Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/22 Oct/Nov 2023 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 2, Oct/Nov 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
- 25
File names: 0620_w23_qp_22 · 0620_w23_ms_22
Grade thresholds for 0620/22 Oct/Nov 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 |
|---|---|---|---|---|---|---|
| 25 | 21 | 18 | 17 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/22 Oct/Nov 2023 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/22 Oct/Nov 2023
- Question 1
Part of a cooling curve for water is shown. 100 0 time / min temperature …
- Question 2
Which statements about clean, dry air are correct? 1 It is a mixture of elements only. 2 It is a mixture of elements and compounds. 3 It contains only non-metals. A 1 and …
- Question 3
A representation of an atom is shown. …
- Question 4
The percentage abundances of three isotopes in a sample of neon are shown. isotope percentage abundance / % Ne …
- Question 5
Potassium reacts with iodine to form potassium iodide. Which statement about potassium iodide is correct? A Each potassium atom shares a pair of electrons with an iodine atom. B In potassium iodide, the particles of potassium have more protons than …
- Question 6
Which substance has the lowest melting point? A graphite B methanol C silicon(IV) oxide D sodium chloride
- Question 7
The diagram shows the structure of a molecule of ethyl ethanoate. …
- Question 8
A hydrocarbon contains 85.7% of carbon by mass. What is the empirical formula of the hydrocarbon? A CH2 B CH4 …
- Question 9
The formula of a compound containing element X is Na2X2O3. The relative formula mass of the compound is 158. What is the relative atomic mass of …
- Question 10
Dilute aqueous potassium chloride is electrolysed using platinum electrodes. Which row identifies the product at each electrode? anode cathode A chlorine hydrogen B chlorine potassium C oxygen hydrogen D oxygen potassium
- Question 11
Concentrated aqueous copper(II) chloride is electrolysed using copper electrodes, as shown. + – copper electrodes aqueous copper(II) chloride power supply What happens to the mass of each electrode during this process? positive electrode negative electrode A decreases decreases B decreases …
- Question 12
The initial and final temperatures of four different reactions are measured. Which reaction is the least exothermic? initial temperature / C final temperature …
- Question 13
Which equation represents an endothermic reaction? A Cl 2(g) 2Cl (g) B CH4(g) …
- Question 14
Methane burns in oxygen to form carbon dioxide and water. CH4(g) …
- Question 15
Hydrochloric acid is added to excess calcium carbonate in two separate experiments. Two different concentrations of hydrochloric acid are used but the temperature is the same in both experiments. The graph of the results shows the volume of carbon dioxide …
- Question 16
The decomposition of dinitrogen tetroxide, N2O4, into nitrogen dioxide, NO2, is a reversible reaction. The equation for the reaction is shown. N2O4(g) 2NO2(g) The forward reaction is endothermic. Which row shows the effect on the position of equilibrium and the …
- Question 17
In a blast furnace, iron(III) oxide is converted to iron and carbon monoxide is converted to carbon dioxide. Fe2O3 + 3CO 2Fe + 3CO2 What happens to each of these reactants? A Both iron(III) oxide and carbon monoxide are …
- Question 18
Which row describes what happens to Fe2+ ions when they are oxidised? electron movement oxidation number of iron A they gain electrons decreases B they gain electrons increases C they lose electrons decreases D they lose electrons increases
- Question 19
In which reaction does an acid react with a base? A Dilute sulfuric acid is added to a piece of magnesium ribbon producing hydrogen. B Dilute sulfuric acid is added to aqueous barium chloride producing a white precipitate of barium …
- Question 20
Which element forms an oxide that reacts with an aqueous solution of a base? A argon B sulfur C magnesium D copper
- Question 21
Which method is used to produce insoluble salts? A addition of excess insoluble base to an acid B addition of excess metal to an acid C precipitation using two aqueous solutions D titration using an acid and an alkali
- Question 22
The noble gases are in Group VIII of the Periodic Table. Some properties of the first four noble gases are shown. noble gas boiling point in C density in g / dm3 helium –267 0.179 neon –246 0.900 argon –186 …
- Question 23
Some properties of element R are shown. melting point in C 98 boiling point in C 883 reaction with cold water gives off H2 gas reaction when heated with oxygen burns to give a white solid In which part of …
- Question 24
Which pair of compounds shows that transition elements have variable oxidation states? A Cr2O3 and CrBr3 B CuSO4 and CuCl 2 C Fe2O3 and FeCl 2 D NiO and NiCl 2
- Question 25
The list gives the order of some metals and hydrogen in the reactivity series. Metal X is also included. most reactive K Mg Zn H X least reactive Cu Which row shows the properties of metal X? reacts with dilute …
- Question 26
When zinc is added to an aqueous solution containing magnesium ions, there is no reaction. Which species has the greatest tendency to lose electrons? A Mg B Mg2+ C Zn D Zn2+
- Question 27
Which gas in the air is needed for iron to rust? A argon B carbon dioxide C nitrogen D oxygen
- Question 28
Which coating prevents iron from rusting even when the coating is damaged? A grease B paint C plastic D zinc
- Question 29
Why is limestone added to the blast furnace? A It neutralises the molten slag produced. B It reacts with impurities to form slag. C It releases carbon dioxide which reduces the iron(III) oxide. D It removes acidic gases such as …
- Question 30
The flow chart shows stages in the treatment of river water to produce drinking water. drinking water stage K stage J sedimentation tank river water What occurs at stages J and …
- Question 31
Carbon dioxide acts as a greenhouse gas by interacting with a particular type of energy that radiates from the Earth’s surface into the atmosphere. Which type of energy is involved and what happens when this energy interacts with carbon dioxide …
- Question 32
Oxides of nitrogen, such as NO and NO2, are formed in the petrol engines of cars. They are removed from the exhaust gases by reactions in the car’s catalytic converter. Which row describes how oxides of nitrogen are formed in …
- Question 33
Which diagram shows the displayed formula for the named organic compound? …
- Question 34
What is the total number of covalent bonds in a molecule of butane, …
- Question 35
Propane reacts with chlorine in a substitution reaction. Which reaction condition is required for the reaction to occur? A acid catalyst B iron catalyst C temperature of …
- Question 36
The structure of an organic compound is shown. …
- Question 37
Which term describes nylon? A addition polymer B natural polymer C polyamide D polyester
- Question 38
Ethene can be polymerised. Which diagram represents the structure of the product formed? …
- Question 39
An acid–base titration is described. ● 25.0 cm3 of dilute aqueous alkali is put into a conical flask. ● Indicator is added to the flask. ● Dilute acid is added to the aqueous alkali until the indicator changes colour. ● …
- Question 40
Substance Q is investigated using chromatography. The chromatogram is shown. The diagram is not drawn to scale. Q 13 mm 83 mm 114 mm 129 mm baseline solvent front Q What is the Rf value of …
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