Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/12 Oct/Nov 2020 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 2, 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
- 24
File names: 0620_w20_qp_12 · 0620_w20_ms_12
Grade thresholds for 0620/12 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 |
|---|---|---|---|---|
| 24 | 21 | 18 | 15 | 12 |
Topics in this paper
Which syllabus chapters 0620/12 Oct/Nov 2020 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/12 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
Oxygen melts at –219 C and boils at –183 C. At which temperature is oxygen a liquid? …
- Question 3
Which diagram shows a burette? …
- Question 4
In the chromatography experiment shown, which label represents the solvent front? …
- Question 5
Different methods of separation rely on substances having different properties. Which property does distillation make use of? A boiling point B colour C particle size D solubility in different solvents
- Question 6
Which statement about atomic structure is correct? A Isotopes have a different nucleon number but the same proton number. B Metal atoms gain electrons to achieve a noble gas electronic structure. C The nucleon number is the total number of …
- Question 7
Which element is a non-metal? A scandium B sodium C strontium D sulfur
- Question 8
The structure of propane, C3H8, is shown. …
- 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 formula of which compound contains the largest number of Group VII atoms? A C13H13IO8 B Cl 2O6 C Al (BrO3)3 D NaFC2H2O2
- Question 12
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 13
Universal indicator solution is added to a neutral solution of concentrated aqueous sodium chloride. The solution, which contains H+ (hydrogen), Na+ (sodium), Cl – (chloride) and OH– (hydroxide) ions, is electrolysed. The product at the cathode is hydrogen gas and …
- Question 14
Which energy level diagram represents an endothermic reaction? energy progress of reaction A reactants products energy progress of reaction B reactants products energy progress of reaction C reactants products energy progress of reaction D reactants products
- Question 15
Which process is a physical change? A burning a piece of magnesium B dissolving calcium carbonate in hydrochloric acid C melting an ice cube D the rusting of an iron nail
- Question 16
Which substance does not require oxygen in order to produce energy? A coal B hydrogen C natural gas D 235U
- Question 17
Nitrogen, N2, and hydrogen, H2, can be converted into ammonia, NH3, using a catalyst. What is the purpose of the catalyst? A to increase the amount of ammonia produced B to increase the rate of reaction C to reduce the …
- Question 18
A reaction is carried out at four different temperatures. The time taken for the reaction to complete at each temperature is measured. The results are shown. …
- Question 19
During the manufacture of sulfuric acid, sulfur dioxide is converted to sulfur trioxide. 2SO2 …
- Question 20
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 21
Which statement describes a base? A It reacts with ammonium chloride to produce ammonia gas. B It reacts with calcium carbonate to produce carbon dioxide gas. C It reacts with copper to produce hydrogen gas. D It turns blue litmus …
- Question 22
Which compound is an acidic oxide? A aluminium oxide B carbon dioxide C copper(II) oxide D magnesium oxide
- Question 23
Which statement describes how a flame test is done? A The tip of a clean wire is dipped into the substance and the wire is placed in a blue Bunsen burner flame. B The tip of a clean wire is …
- 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 row about elements in the Periodic Table is correct? statement 1 statement 2 A two elements in the same group have similar chemical properties metals are on the left of the table B two elements in the same group …
- Question 26
Tennessine, Ts, is a newly discovered element. The atomic number of tennessine is 117 and it is placed directly underneath astatine in Group VII of the Periodic Table. The trends in properties of Group VII elements are shown. element boiling …
- 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
Which diagram best represents the structure of a substance that is a good conductor of electricity at …
- Question 30
Some properties of element Y are listed. ● It reacts with hydrochloric acid to make hydrogen gas. ● It reacts with steam but not with cold water. ● The oxide of Y cannot be reduced by carbon. What is element …
- Question 31
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 32
Water is purified using several processes. Four of the processes are listed. 1 Chlorine is added to water to kill any bacteria. 2 Water is passed through coarse gravel to remove large pieces of dirt. 3 Water is passed through …
- Question 33
When solid S is heated strongly, it forms gas G. G turns limewater cloudy. What are S and G and which type of reaction does S undergo? S G type of reaction A calcium carbonate carbon dioxide combustion B calcium …
- Question 34
The element sulfur is found in a number of different minerals. Which mineral contains the greatest percentage by mass of sulfur? A barite, BaSO4 B galena, PbS C gypsum, CaSO4 D pyrite, FeS2
- Question 35
Which structure represents a molecule of ethanol? …
- 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
Which statement describes methane? A It is an alcohol. B It is an unsaturated molecule. C It contains carbon, hydrogen and oxygen atoms only. D Each molecule contains four single covalent bonds.
- 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
The structure of propane is shown. …
- Question 40
The structure of a compound X is shown. …
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