Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/22 Oct/Nov 2020 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), 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
- 27
File names: 0620_w20_qp_22 · 0620_w20_ms_22
Grade thresholds for 0620/22 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 | F | G |
|---|---|---|---|---|---|---|
| 27 | 24 | 20 | 17 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/22 Oct/Nov 2020 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/22 Oct/Nov 2020
- Question 1
Which gas has the slowest rate of diffusion? …
- Question 2
A chromatography experiment is carried out to analyse the pigments present in four different types of leaf. The student carrying out the experiment forgot to complete his table of results, which is shown. plant leaf number of pigments identified colour …
- Question 3
Which statement about isotopes is correct? A They have different proton numbers. B They have different chemical properties. C They have the same nucleon number. D They have the same number of electrons in their outer shell.
- 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
The arrangements of the electrons in two ions formed from elements X and Y are shown. …
- Question 7
Which row identifies compounds that contain single covalent bonds only, double covalent bonds only or both single and double covalent bonds? single covalent bonds only double covalent bonds only both single and double covalent bonds A C2H4 CH3OH CO2 B …
- Question 8
Ethyl methanoate, HCOOC2H5, burns in excess oxygen to produce carbon dioxide and water. The equation is shown. 2HCOOC2H5 + xO2 6CO2 + 6H2O What is the value of …
- 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
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 13
What is the empirical formula of an oxide of iron, formed by reacting 2.24 g of iron with 0.96 g of oxygen? A FeO B Fe2O C Fe2O3 D Fe3O4
- Question 14
The combustion of methane is exothermic. CH4 …
- Question 15
Hydrogen reacts with oxygen in a fuel cell. …
- 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
Ammonia is produced by the Haber process. The equation is shown. …
- Question 19
During the manufacture of sulfuric acid, sulfur dioxide is converted to sulfur trioxide. 2SO2 …
- Question 20
The equation for a redox reaction is shown. 2FeSO4 + Cl 2 + H2SO4 Fe2(SO4)3 + 2HCl Which element is reduced? A chlorine B iron C oxygen D sulfur
- Question 21
The equation shows a reaction between aqueous hydrogen bromide and aqueous ammonia. HBr(aq) + NH3(aq) NH4 +(aq) + Br–(aq) Which statement describes the role of aqueous hydrogen bromide? A It is a catalyst. B It is a reducing agent. …
- Question 22
The equations for three reactions are shown. 1 Pb(NO3)2(aq) + 2KI(aq) PbI2(s) + 2KNO3(aq) 2 2AgNO3(aq) + CuI2(aq) Cu(NO3)2(aq) + 2AgI(s) 3 CuO(s) + H2SO4(aq) CuSO4(aq) + H2O(l) Which reactions are suitable for making a salt by …
- Question 23
Zinc oxide is an amphoteric oxide. Which row describes the reactions of zinc oxide? reaction with alkalis reaction with acids …
- 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
A new element oxfordium, Ox, was discovered with the following properties. solubility electrical conduction formula of element bonding in a molecule of Ox2 insoluble in water doesn’t conduct Ox2 Ox Ox In which group of the Periodic Table should the …
- 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
Transition elements can have variable oxidation states. Which pair of compounds shows a transition element in two different oxidation states? A Cr2O3 and Cr2(SO4)3 B Cu2O and CuCO3 C ZnS and ZnSO4 D NiO and Ni(NO3)2
- Question 29
Which diagram best represents the structure of a substance that is a good conductor of electricity at …
- Question 30
Why is aluminium metal unreactive with air? A It is covered with a layer of oxide. B It is low in the reactivity series. C It is produced by electrolysis of its oxide. D It melts at a high temperature.
- Question 31
The apparatus used for the extraction of aluminium oxide by electrolysis is shown. carbon lining as cathode carbon anodes + – molten aluminium collects at the bottom solution of aluminium oxide in molten cryolite Which equation represents a reaction taking …
- Question 32
The results of tests on solid S and its aqueous solution are shown. tests on solid S tests on aqueous solution of S effect of heat effect of aqueous sodium hydroxide effect of aqueous ammonia brown gas given off, together …
- Question 33
Part of the carbon cycle is shown. glucose combustion P Q CO2 R plant CH4 What are processes P, Q and …
- 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
Which structures are structural isomers of each other? …
- Question 37
Which molecule is not produced by an addition reaction of ethene? A CH3CH3 B CH2BrCH2Br C CH3CH2OH D CH3CH2CH3
- 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 statement about nylon and Terylene is correct? A Nylon and Terylene are made from monomers with C=C bonds. B Nylon and Terylene contain the same linkage. C Nylon is a polyester. D Terylene is made from two different monomers.
- Question 40
Which diagram represents the structure of a protein? …
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