Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/12 Oct/Nov 2021 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 2, 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
- 22
File names: 0620_w21_qp_12 · 0620_w21_ms_12
Grade thresholds for 0620/12 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 |
|---|---|---|---|---|
| 22 | 20 | 17 | 15 | 12 |
Topics in this paper
Which syllabus chapters 0620/12 Oct/Nov 2021 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/12 Oct/Nov 2021
- Question 1
Which row describes what happens to the particles in solid iodine when it is heated and turned into a gas? separation of particles speed of particles A closer together faster B closer together slower C further apart faster D further …
- 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
How many protons, neutrons and electrons are there in one atom of the isotope 27 13Al ? protons neutrons electrons …
- Question 5
Which description of brass is correct? A alloy B compound C element D non-metal
- Question 6
Rubidium is in Group I and iodine is in Group VII of the Periodic Table. Which row describes what happens when rubidium and iodine react together to form rubidium iodide? rubidium iodine A each atom gains one electron each atom …
- Question 7
Which row shows the properties for an ionic compound? volatility electrical conductivity when solid A high good B high poor C low good D low poor
- Question 8
Which substance is described as a macromolecule? A ammonia B graphite C iron D sodium chloride
- Question 9
The formula of sodium chlorate(V) is NaCl O3. What is the relative formula mass of sodium chlorate(V), NaCl …
- Question 10
Iron can be electroplated with zinc to make it resistant to corrosion. Which row about electroplating iron with zinc is correct? positive electrode (anode) negative electrode (cathode) electrolyte A iron zinc iron nitrate B iron zinc zinc nitrate C zinc …
- Question 11
An energy level diagram for the reaction between substance X and substance Y to form substance Z is shown. …
- Question 12
Which reactions are exothermic? …
- 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
When a piece of marble is added to hydrochloric acid, bubbles of carbon dioxide gas are given off. Which method is used to find the rate of the reaction? A counting the number of gas bubbles formed B measuring the …
- Question 15
Solid X is heated strongly. The colour of the solid changes from blue to white. What is solid X? A anhydrous cobalt(II) chloride B calcium carbonate C hydrated copper(II) sulfate D lead(II) bromide
- Question 16
What happens to a chemical substance when it is reduced? A It burns. B It decomposes. C It loses oxygen. D It gains mass.
- Question 17
Which statements about acids and bases are correct? 1 An acid reacts with a metal to give off hydrogen. 2 A base reacts with an ammonium salt to give off ammonia. 3 An acid reacts with a carbonate to give …
- Question 18
Oxide 1 is a solid that reacts with dilute hydrochloric acid. Oxide 2 is a gas that reacts with sodium hydroxide solution. What are the formulae of the oxides? oxide 1 oxide 2 A CaO MgO B MgO NO2 C …
- Question 19
In the preparation of zinc sulfate crystals, excess zinc oxide is added to dilute sulfuric acid. Why is an excess of zinc oxide added? A to make sure crystals are formed and not powder B to avoid filtering the mixture …
- 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
Which statement about the elements in Group VII of the Periodic Table is correct? A Chlorine can displace bromine from bromides. B Group VII elements are all solids at room temperature. C Group VII elements occur as monoatomic covalent molecules. …
- Question 23
Part of the Periodic Table is shown. Which element is a transition element? …
- 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 row describes the method of extraction of aluminium and iron from their ores? aluminium iron A electrolysis electrolysis B electrolysis reduction with carbon C reduction with carbon electrolysis D reduction with carbon reduction with carbon
- Question 27
Which statement about metals and their uses is correct? A Aluminium is used to make food containers because it is resistant to corrosion. B Aluminium is used to make aircraft wings because it is strong and has a high density. …
- Question 28
The diagrams show some uses of water in the home. …
- Question 29
Four different test-tubes containing water and an iron nail are left for two weeks. Which nail showed the least amount of rusting? A tap water B boiled tap water C boiled tap water D tap water
- Question 30
Which process does not produce a greenhouse gas? A acid rain on limestone buildings B combustion of wood C digestion in cows D zinc reacting with sulfuric acid
- 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
A chemical equation for the complete combustion of methane is shown. 2CH4 + zO2 2CO2 + 4H2O What is the value of …
- 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 substance is not a fossil fuel? A ethanol B gasoline C kerosene D methane
- Question 36
Which compound belongs to a different homologous series to the others? …
- Question 37
What is a property of aqueous ethanoic acid? A It changes red litmus blue. B It has a deep purple colour. C It has a pH of less than 7. D It reacts with a metal oxide to form carbon …
- Question 38
Which statements about unsaturated hydrocarbons are correct? 1 They contain both single and double bonds. 2 They turn aqueous bromine from colourless to brown. 3 They can be manufactured by cracking. A 1 and 2 only B 1 and 3 …
- Question 39
Which substance is used to produce alcohol by fermentation? A phosphoric acid B platinum C iron D yeast
- Question 40
Which statements are correct? 1 Polymers are large molecules built up from monomers. 2 Proteins are natural polymers. 3 Proteins and carbohydrates are constituents of food. A 1 and 2 only B 1 and 3 only C 2 and 3 …
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