Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/23 Oct/Nov 2023 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 3, 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
- 27
File names: 0620_w23_qp_23 · 0620_w23_ms_23
Grade thresholds for 0620/23 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 |
|---|---|---|---|---|---|---|
| 27 | 23 | 20 | 18 | 16 | 14 | 12 |
Topics in this paper
Which syllabus chapters 0620/23 Oct/Nov 2023 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/23 Oct/Nov 2023
- Question 1
A sample of a gas occupies 340 cm3 at room temperature and pressure. The temperature and pressure are both increased, but the volume occupied by the gas remains 340 cm3. Which row describes what happens to the particle speed and …
- Question 2
Which statements about the rate of diffusion of the gases ammonia, carbon monoxide, nitrogen and oxygen are correct? 1 Nitrogen and carbon monoxide will diffuse at the same rate. 2 Oxygen will diffuse slowest because it is an element, whereas …
- Question 3
The structure of an atom of element X is shown. 5p 6n key = electron = neutron = proton n p What is element X? A boron B carbon C sodium D sulfur
- Question 4
Which statement explains why isotopes of an element have the same chemical reactions? A They have different numbers of neutrons. B They have ions with different numbers of electrons. C They have the same number of outer shell electrons. D …
- Question 5
Magnesium reacts with oxygen to form magnesium oxide. What happens to magnesium atoms and oxygen atoms during this reaction? A Magnesium and oxygen share two electrons. B Magnesium gains two electrons and oxygen loses two electrons. C Magnesium loses one …
- Question 6
Which row about the properties of both diamond and silicon(IV) oxide is correct? conductor of electricity type of molecule A yes giant covalent B yes simple covalent C no giant covalent D no simple covalent
- Question 7
The equation represents the reaction between solid magnesium oxide and dilute hydrochloric acid to form magnesium chloride and water. MgO + 2HCl MgCl …
- Question 8
Which substance is a mixture? A air B graphite C oxygen D water
- Question 9
The number of moles of atoms X, Y and Z, in a compound, are shown. atom moles …
- Question 10
1.0 mol of silver nitrate, AgNO3, contains …
- Question 11
Concentrated aqueous magnesium bromide is electrolysed using carbon electrodes. Which equations represent the reactions occurring at each electrode? positive electrode negative electrode A 2Br –(aq) Br2(aq) + 2e– 2H+(aq) …
- Question 12
Aqueous copper(II) sulfate is electrolysed using carbon electrodes. Which statement is correct? A Bubbles of hydrogen gas are formed at the anode. B Bubbles of oxygen gas are formed at the cathode. C Copper is deposited at the anode. D …
- Question 13
When water is added to anhydrous iron(III) chloride, FeCl 3, hydrated iron(III) chloride, FeCl 3•6H2O, is formed and energy is given out. FeCl …
- Question 14
Ethene reacts with hydrogen. The equation is shown. …
- Question 15
Statements about four different acids are listed. …
- Question 16
Anhydrous cobalt(II) chloride is blue and turns pink when water is added. How is this reaction reversed? A adding dilute acid B filtering C heating D cooling
- Question 17
The reaction between hydrogen and nitrogen is reversible. The forward reaction is exothermic. …
- Question 18
Ethanol can be turned into ethanoic acid by passing it over hot copper(II) oxide. CH3CH2OH + 2CuO CH3COOH …
- Question 19
When heated strongly, silicon(IV) oxide reacts with carbon. SiO2 …
- Question 20
Which statement about aqueous weak acids is correct? A Weak acids are always dilute aqueous solutions. B Weak acids dissociate fully in aqueous solution. C When a weak acid is added to blue litmus paper, it stays blue. D When …
- Question 21
Which oxides are basic? 1 calcium oxide 2 sodium oxide 3 iron(II) oxide …
- Question 22
Zinc oxide is an amphoteric oxide. Zinc oxide is added to excess dilute hydrochloric acid. Zinc oxide is added to excess aqueous sodium hydroxide. Which row describes the observations made in these reactions? excess dilute hydrochloric acid excess aqueous sodium …
- Question 23
Which row shows properties of an element that is in the same group of the Periodic Table as lithium? electrical conductivity density in g / cm3 A high 0.97 B high 8.93 C low 0.07 D low 3.12
- Question 24
The elements in Group VII include chlorine, bromine and iodine. Which statements are correct? 1 Iodine is more dense than chlorine. 2 Iodine displaces chlorine from a solution containing chloride ions. 3 Bromine is a diatomic non-metal. 4 Chlorine gas …
- Question 25
Cobalt is a transition element. What is a property of cobalt? A It can form coloured compounds. B It is a poor electrical conductor. C It has a low density. D It has a low melting point.
- Question 26
Which metal has variable oxidation numbers? A aluminium B calcium C copper D sodium
- Question 27
Which statement about alloys is correct? A Alloys are pure metal elements. B At least two or more metals react together to make alloys. C Alloys can be harder and stronger than a pure metal. D Steel is not an …
- Question 28
A metal M is between sodium and magnesium in the reactivity series. Which reactions occur with M and its oxide? M reacts with steam M can be extracted by heating its oxide with carbon A no no B no yes …
- Question 29
The diagrams show experiments to investigate rusting of iron nails. 3 boiled water 2 salt water 1 tap water layer of oil In which test-tubes do the nails rust? …
- Question 30
Which equation represents a reaction that takes place when iron is extracted from its ore in the blast furnace? A CaO + SiO2 CaSiO3 B CaO + CO2 CaCO3 C 2CO …
- Question 31
Some uses of water are listed. 1 for drinking 2 in chemical reactions 3 in swimming pools 4 in washing For which uses is it necessary to chlorinate the water? A 1 and …
- Question 32
Oxides of nitrogen are formed in car engines and are a source of air pollution. To decrease this pollution, catalytic converters are fitted to car exhausts. What happens to the oxides of nitrogen in the catalytic converter? A combustion B …
- Question 33
Which pair of compounds are structural isomers of each other? A CH3CH2CH3 and CH3CH2CH2CH3 B CH2=CHCH3 and CH3CH=CH2 C CH2(OH)CH2CH3 and CH3CH2CH2OH D CH3CH2CH2COOH and CH3COOCH2CH3
- Question 34
Methane reacts with chlorine in sunlight. CH4 + Cl 2 CH3Cl + HCl Which statements about this reaction are correct? 1 It is a substitution reaction. 2 It is an addition reaction. 3 It is a photochemical reaction. 4 …
- Question 35
Propene reacts with bromine to give one product only. What is the formula of the product? A CH3CH2CHBr2 B CH2BrCH2CH2Br C CH3CHBrCH2Br D CH3CH2CH2Br
- Question 36
Ethanol can be manufactured by fermentation or by the catalytic addition of steam to ethene. Which statements describe an advantage of manufacturing ethanol by fermentation? 1 The yield of ethanol is low. 2 The method uses a batch process. 3 …
- Question 37
A compound with the formula CH3COOC2H5 is formed from ethanol in two separate reactions. reaction 1 Ethanol reacts to form ethanoic acid. reaction 2 Ethanoic acid and ethanol react together to form CH3COOC2H5. Which row describes reaction 1 and reaction …
- Question 38
The flow diagram shows how poly(ethene) may be made from petroleum. petroleum fuel oil ethene poly(ethene) …
- Question 39
Rf values are used to identify unknown substances using paper chromatography. Which statements about Rf values are correct? 1 Rf values are always less than 1.0. 2 Rf value = distance travelled by solvent distance travelled by unknown substance. …
- Question 40
The results of some tests on an aqueous solution of substance X are listed. 1 A cream precipitate is produced when adding aqueous silver nitrate. 2 Adding aqueous sodium hydroxide produces a green precipitate which dissolves in excess alkali. 3 …
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