Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/11 Oct/Nov 2021 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 1, Oct/Nov 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
- 20
File names: 0620_w21_qp_11 · 0620_w21_ms_11
Grade thresholds for 0620/11 Oct/Nov 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 |
|---|---|---|---|---|
| 20 | 18 | 16 | 14 | 12 |
Topics in this paper
Which syllabus chapters 0620/11 Oct/Nov 2021 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/11 Oct/Nov 2021
- Question 1
Decane has a freezing point of –30 °C and a boiling point of …
- Question 2
A student put exactly 25.00 cm3 of dilute hydrochloric acid into a conical flask. The student added 2.5 g of solid sodium carbonate and measured the change in temperature of the mixture. Which apparatus does the student need to use? …
- Question 3
A student separates sugar from pieces of broken glass by dissolving the sugar in water and filtering off the broken glass. filtrate What is the filtrate? A broken glass only B broken glass and sugar solution C pure water D …
- Question 4
Two isotopes of carbon are 12C and 14C. Which statement about these two isotopes is correct? A Their electronic structure is different. B They have different numbers of nucleons. C They have different numbers of protons. D They have the …
- Question 5
Which description of brass is correct? A alloy B compound C element D non-metal
- Question 6
The element livermorium, Lv, was discovered in the year 2000. Which statement predicts what will happen to an Lv atom when it forms an Lv2– ion? A The atom will gain two electrons. B The atom will lose two electrons. …
- Question 7
Which substance is a diatomic covalent compound? A Cl 2 B HCl …
- Question 8
Which statement about carbon is correct? A Diamond and graphite both have simple molecular structures. B Diamond and graphite are both used to make cutting tools. C Each carbon atom in diamond is bonded to three other carbon atoms. D …
- Question 9
The formula of sodium chlorate(V) is NaCl O3. What is the relative formula mass of sodium chlorate(V), NaCl …
- Question 10
Which statements about the products of electrolysis, using inert electrodes, are correct? 1 When molten lead(II) bromide is electrolysed, bromine is formed at the cathode. 2 When dilute sulfuric acid is electrolysed, oxygen is formed at the anode. 3 When …
- Question 11
The temperature decreases when aqueous ethanoic acid reacts with solid sodium carbonate to form a salt. Which type of reaction and energy change occur? type of reaction energy change A neutralisation endothermic B neutralisation exothermic C redox endothermic D redox …
- Question 12
Which gas is used as a fuel? A helium B hydrogen C nitrogen D oxygen
- Question 13
Solid copper(II) carbonate reacts with dilute sulfuric acid. CuCO3 + H2SO4 → CuSO4 + CO2 + H2O The rate of the reaction can be changed by varying the conditions. Which changes always increase the rate of this chemical reaction? 1 …
- Question 14
Some changes are shown in the table. In which rows are the changes described correctly? chemical change physical change 1 rusting iron melting ice 2 burning ethanol evaporating ethanol 3 melting iron evaporating ethanol 4 cracking hydrocarbons burning methane A …
- Question 15
X is a pink solid. Y is a blue solid. When X is heated, water is produced and the solid turns blue. When water is added to Y, the solid turns pink. What are X and …
- Question 16
Carbon reacts with carbon dioxide as shown. CO2 …
- Question 17
Which substances do not produce water as a product when they are reacted together? A calcium hydroxide and ammonium chloride B calcium carbonate and dilute hydrochloric acid C copper(II) oxide and dilute nitric acid D zinc and dilute sulfuric acid
- Question 18
The surface of magnesium ribbon reacts with the air to form magnesium oxide. Which statement explains why the layer of magnesium oxide is removed by dilute hydrochloric acid? A Magnesium is a base. B Magnesium ribbon reacts with hydrochloric acid. …
- Question 19
Copper(II) chloride crystals are made by adding solid copper(II) carbonate to dilute hydrochloric acid until no more dissolves. Which process is used to obtain pure copper(II) chloride crystals from the mixture? A distillation of the mixture B evaporation of the …
- Question 20
Which statement about aqueous sodium hydroxide is correct? A When it is added to a solution containing sulfate ions, a white precipitate is formed. B When it is added to a solution of copper(II) ions, a blue precipitate is formed …
- Question 21
A period of the Periodic Table is shown. group I II III IV V VI VII VIII element …
- Question 22
What are the products of the reaction between sodium and water? A hydrogen and sodium hydroxide B hydrogen and sodium oxide C oxygen and sodium hydroxide D oxygen and sodium oxide
- Question 23
Element X has a high density, a high melting point and a high electrical conductivity. It forms many coloured compounds. Element X and many of its compounds act as catalysts. What could be the atomic number of …
- Question 24
The noble gases are in Group VIII of the Periodic Table. Which statement explains why noble gases are unreactive? A They all have eight electrons in their outer shells. B They all have full outer shells. C They are all …
- Question 25
Which statement is correct for all metals? A They conduct electricity when molten. B They gain electrons when they form ions. C They have a low density. D They have a low melting point.
- Question 26
Which statement about the extraction of metals is correct? A Aluminium is extracted from the ore bauxite by electrolysis. B Aluminium is extracted from the ore hematite by electrolysis. C Iron is extracted from the ore bauxite by electrolysis. D …
- Question 27
Which row identifies a use of mild steel and a use of stainless steel? mild steel stainless steel A chemical plant and cutlery car bodies and machinery B car bodies and chemical plant machinery and cutlery C machinery and chemical …
- Question 28
The diagrams show some uses of water in the home. …
- Question 29
Which air pollutants can cause damage to buildings made of limestone? 1 carbon monoxide 2 lead compounds 3 oxides of nitrogen 4 sulfur dioxide A 1 and …
- Question 30
Which statement about fertilisers is correct? A Ammonium sulfate, (NH4)2SO4, is a better fertiliser than ammonium nitrate, NH4NO3, because it contains more oxygen. B Ammonium phosphate, (NH4)3PO4, is a good fertiliser because it contains hydrogen. C Potassium nitrate, KNO3, is …
- Question 31
Sulfur burns to make sulfur dioxide. Which row describes a source of sulfur and a use of sulfur dioxide? source of sulfur use of sulfur dioxide A the air food preservative B the air treating acidic soils C underground deposits …
- Question 32
Lime (calcium oxide) is used to treat waste water from a factory. Which substance is removed by the lime? A ammonia B sodium chloride C sodium hydroxide D sulfuric acid
- Question 33
Which compound is correctly named? …
- Question 34
Fuel X produces carbon dioxide and water when it is burned in air. So does fuel Y. What could X and Y be? …
- Question 35
Which hydrocarbon is the main constituent of natural gas? A butane B ethane C methane D propane
- Question 36
Which statements about ethene are correct? 1 It contains a C=C bond. 2 It does not decolourise bromine water. 3 Its molecules can join together to form long chain compounds. …
- Question 37
Part of the structure of a very large molecule is shown. …
- Question 38
What is the total number of single covalent bonds in a molecule of ethanol? …
- Question 39
Which statement about aqueous ethanoic acid is correct? A It reacts with magnesium to produce a salt and hydrogen. B It reacts with sodium hydroxide to produce a salt and hydrogen. C It reacts with ammonium salts to produce ammonia. …
- Question 40
Three statements about synthetic polymers are listed. 1 Man-made fibres are used for making clothing. 2 Plastics can cause pollution problems both on land and at sea. 3 Plastics which do not rot away are described as non-biodegradable. Which statements …
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