Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/13 Oct/Nov 2020 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 3, Oct/Nov 2020: 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
- 23
File names: 0620_w20_qp_13 · 0620_w20_ms_13
Grade thresholds for 0620/13 Oct/Nov 2020
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 |
|---|---|---|---|---|
| 23 | 20 | 18 | 15 | 12 |
Topics in this paper
Which syllabus chapters 0620/13 Oct/Nov 2020 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/13 Oct/Nov 2020
- Question 1
‘The movement of a substance very slowly from an area of high concentration to an area of low concentration.’ Which process is being described? A a liquid being frozen B a solid melting C a substance diffusing through a liquid …
- Question 2
When a dark grey solid element is heated, it changes directly into a purple gas. Which word describes this change? A boiling B evaporation C melting D sublimation
- Question 3
Nickel(II) sulfate is a green solid that is soluble in water. Which method is used to obtain a pure sample of nickel(II) sulfate crystals from a mixture of nickel(II) sulfate and sand? A Heat the mixture with water and distil …
- Question 4
In the chromatography experiment shown, which label represents the solvent front? …
- Question 5
What is the meaning of the term nucleon number? A the number of neutrons in the nucleus of an atom B the number of protons in the nucleus of an atom C the total number of protons and electrons in …
- Question 6
The diagram represents the structure of a solid. What could the solid be? brass graphite sodium chloride …
- Question 7
Magnesium reacts with sulfuric acid. What are the formulae of the products formed in this reaction? A MgSO4 and H2 B MgSO4 and H2O C Mg(SO4)2 and H2 D Mg(SO4)2 and H2O
- Question 8
Which diagram shows the arrangement of the outer shell electrons in a molecule of water? …
- Question 9
Rubidium is in Group I of the Periodic Table and bromine is in Group VII. Rubidium reacts with bromine to form an ionic compound. Which row shows the electron change taking place for rubidium and the correct formula of the …
- Question 10
Which statement explains why graphite is used as a lubricant? A All bonds between the atoms are weak. B It conducts electricity. C It has a low melting point. D Layers in the structure can slide over each other.
- Question 11
The relative atomic mass of chlorine is 35.5. When calculating relative atomic mass, which particle is the mass of a chlorine atom compared to? A a neutron B a proton C an atom of carbon-12 D an atom of hydrogen-1
- Question 12
Molten sodium chloride is electrolysed using inert electrodes. Which row shows the products formed at the cathode and anode? cathode anode A chlorine hydrogen B chlorine sodium C hydrogen chlorine D sodium chlorine
- Question 13
Ethanol is used as a fuel. ethanol + oxygen carbon dioxide + water Which statements are correct? 1 The reaction is endothermic. 2 The products have more energy than the reactants. 3 The oxygen for this reaction comes from …
- Question 14
Hydrogen and the isotope uranium-235 are both used to generate electricity. Which term describes the change that occurs for both substances in this context? A combustion B endothermic C exothermic D decomposition
- Question 15
Which substance does not require oxygen in order to produce energy? A coal B hydrogen C natural gas D 235U
- Question 16
When calcium carbonate reacts with dilute hydrochloric acid, carbon dioxide gas is given off. This causes the reaction mixture to lose mass. Four separate experiments are performed. The starting mass, and the mass after five minutes, are measured for each …
- Question 17
Silver oxide reacts with magnesium to make silver and magnesium oxide. Ag2O + Mg 2Ag + MgO Which substance is oxidised in this reaction? A magnesium B magnesium oxide C silver D silver oxide
- Question 18
When pink crystals of cobalt(II) chloride are heated, steam is given off and the colour of the solid changes to blue. CoCl 2•6H2O CoCl …
- Question 19
Which oxide is used to neutralise acidic gases in a power station? A calcium oxide B carbon dioxide C nitrogen oxide D sulfur dioxide
- Question 20
Period 3 of the Periodic Table contains the elements sodium to argon. Element Q is a non-metal from this period. Which statement about Q is correct? A It conducts electricity. B It has a lower proton number than sodium. C …
- Question 21
Equal masses of a solid, X, are added in turn to an aqueous solution, Y. The pH of the solution is measured after each addition until the pH becomes 7. The readings are plotted as shown. …
- Question 22
An aqueous cation reacts with aqueous sodium hydroxide to form a white precipitate. The precipitate is insoluble in excess sodium hydroxide. What is the aqueous cation? A aluminium ion B calcium ion C chromium ion D zinc ion
- Question 23
Vinegar has a pH of 3. Which statement about vinegar is correct? A It forms a salt with sulfuric acid. B It reacts with some metals to form hydrogen gas. C It reacts with ammonium compounds to give ammonia gas. …
- Question 24
A student carries out an experiment to prepare pure magnesium sulfate crystals. The diagram shows the first stage of the preparation. dilute sulfuric acid stirrer magnesium carbonate He adds magnesium carbonate until no more reacts. Which process should he use …
- Question 25
Which statement about the halogens and their compounds is correct? A The colour of the element gets lighter going down Group VII. B The elements get less dense going down Group VII. C When chlorine is added to sodium iodide …
- Question 26
Which compound contains a transition metal ion and a halide ion? A aluminium iodide B calcium fluoride C iron(III) oxide D nickel(II) chloride
- Question 27
A flammable gas needs to be removed from a tank at an industrial plant. For safety reasons, an inert gas is used. Which gas is suitable? A argon B hydrogen C methane D oxygen
- Question 28
A substance, X, has the following properties. 1 It has a high melting point. 2 It conducts electricity in the solid and liquid states. 3 It is malleable. 4 It has a high density. What is …
- Question 29
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 30
Mild steel and stainless steel are two alloys containing the element iron. Which row identifies a use of each alloy? a use of mild steel a use of stainless steel A car bodies cutlery B car bodies electrical wiring C …
- Question 31
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 32
Oxides of nitrogen are given out from car exhausts. Which row best shows why oxides of nitrogen are unwanted in the atmosphere? acidic toxic A no no B no yes C yes no D yes yes
- Question 33
Two reactions, P and Q, produce carbon dioxide. C6H12O6 glucose Na2CO3 sodium carbonate CO2 P Q Which types of reaction are P and …
- Question 34
Which gas is used as a food preservative? A methane B fluorine C oxygen D sulfur dioxide
- Question 35
Which calcium compound does not neutralise an acid soil? A calcium oxide B calcium sulfate C calcium hydroxide D calcium carbonate
- Question 36
Petroleum is separated into fractions by fractional distillation. Separation occurs in a fractionating column. Some properties of three of these fractions are shown. fraction boiling point range / C number of carbon atoms in the molecules …
- Question 37
How many atoms are there in one molecule of ethanoic acid? …
- Question 38
The flow chart shows the preparation of ethanol and some important chemistry of ethanol. ethanol carbon dioxide + substance Z substance X process Y fermentation What are X, Y and …
- Question 39
Which substance is not a fraction obtained from the fractional distillation of petroleum? A ethene B fuel oil C naphtha D refinery gas
- Question 40
Some plastics are non-biodegradable. What is the meaning of the term non-biodegradable? A cannot be recycled for further use B gives off greenhouse gases when burnt C harmful to animals and plants D not broken down by natural processes Group …
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