Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/22 Oct/Nov 2021 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), 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
- 24
File names: 0620_w21_qp_22 · 0620_w21_ms_22
Grade thresholds for 0620/22 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 | F | G |
|---|---|---|---|---|---|---|
| 24 | 20 | 16 | 14 | 13 | 12 | 11 |
Topics in this paper
Which syllabus chapters 0620/22 Oct/Nov 2021 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/22 Oct/Nov 2021
- Question 1
An experiment is set up as shown. cotton wool soaked in ammonia cotton wool soaked in hydrochloric acid After several minutes, a white ring of ammonium chloride appears as shown. ammonium chloride Which statement explains the observation after several minutes? …
- 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
Some properties of diamond are shown. 1 It is very hard. 2 Every atom forms four bonds. 3 It does not conduct electricity. Which properties are also shown by silicon(IV) oxide? A 1 only B 1 and …
- Question 7
Which statement describes the attractive forces between molecules? A They are strong covalent bonds which hold molecules together. B They are strong ionic bonds which hold molecules together. C They are weak forces formed between covalently-bonded molecules. D They are …
- Question 8
Which substance is described as a macromolecule? A ammonia B graphite C iron D sodium chloride
- Question 9
The equation for the reaction of sodium with water is shown. 2Na …
- 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
Chlorine reacts with ethane to produce chloroethane and hydrogen chloride. …
- Question 12
Chlorine gas is bubbled into aqueous potassium iodide. What is the ionic equation for the reaction that takes place? A Cl …
- Question 13
Concentrated aqueous sodium chloride is electrolysed. Which equation represents the reaction at the cathode? A Na+ …
- Question 14
Which statements about hydrogen are correct? 1 When hydrogen is burned, heat energy is released. 2 When hydrogen is used in a fuel cell, electrical energy is generated. 3 When hydrogen is used as a fuel, water is the only …
- 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
Iron(II) chloride solution reacts with chlorine gas. The equation is shown. 2FeCl 2(aq) + Cl 2(g) 2FeCl 3(aq) Which statements about this reaction are correct? 1 Fe2+ ions are reduced to Fe3+ ions. 2 Chlorine acts as a reducing …
- 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
Which reaction is a photochemical reaction? A addition of bromine to propene B esterification of ethanol and ethanoic acid C oxidation of ethanol D substitution of methane with chlorine
- Question 20
The equation shown represents a reaction at equilibrium. m and n represent the balancing numbers for the reactant and product respectively. mP(g) nQ(g) A high temperature increases the concentration of Q. A high pressure increases the concentration of Q. Which …
- Question 21
A period of the Periodic Table is shown. group I II III IV V VI VII VIII element …
- Question 22
All metal nitrates are soluble in water. All metal chlorides are soluble except silver and lead. All metal carbonates are insoluble except sodium and potassium. Which aqueous solutions produce a precipitate when mixed together? 1 silver nitrate + sodium carbonate …
- Question 23
Which row describes properties of transition elements? property 1 property 2 property 3 A coloured compounds high density variable oxidation states B high density high melting point one oxidation state C high melting point coloured compounds one oxidation state D …
- 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
Carbon dioxide is produced during the extraction of aluminium from bauxite. Which statement describes how this carbon dioxide is made? A Carbon monoxide reduces aluminium oxide forming carbon dioxide and aluminium. B Carbon is burned in the blast furnace to …
- Question 27
Aluminium objects do not need protection from corrosion. Iron objects must be protected from corrosion. Which statement explains why aluminium resists corrosion? A Aluminium does not form ions easily. B Aluminium does not react with water or air. C Aluminium …
- Question 28
Which statements explain why zinc is used to protect iron from rusting? 1 Zinc is more reactive than iron. 2 Zinc is less reactive than iron. 3 Zinc can form alloys with iron. 4 Zinc acts as a sacrificial metal. …
- Question 29
Which conditions are used in the Haber process? temperature / C pressure / atmospheres …
- 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
Which reaction involving sulfur dioxide is correct? A It is produced during the extraction of zinc from zinc blende. B It reacts with concentrated sulfuric acid to form oleum. C It reacts with sulfur to form sulfur trioxide. D It …
- 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
What is the structure of the ester formed from ethanoic acid and propanol? …
- 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
The structures of four organic molecules are shown. …
- Question 36
Which statement about ethene is correct? A It has the chemical formula C2H6. B It burns in excess oxygen producing carbon dioxide and water. C It reacts with Br2 to produce an orange solution. D It reacts with oxygen to …
- Question 37
Ethanol is manufactured by fermentation of sugars or by catalytic hydration of ethene. Which row states an advantage of each method? fermentation hydration A produces purer ethanol is a batch process B produces purer ethanol is a continuous process C …
- 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 polymers have the same linkage between monomer units? A carbohydrate and polyamide B carbohydrate and polyester C protein and polyamide D protein and polyester
- Question 40
The diagram shows the partial structure of Terylene. …
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