Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/22 Oct/Nov 2018 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 2, Oct/Nov 2018: the question paper and its official mark scheme, 40 questions, with the grade thresholds. Free to open, no account needed.
- Questions
- 40
- Marks
- 40
- Grade A from
- 28
File names: 0620_w18_qp_22 · 0620_w18_ms_22
Grade thresholds for 0620/22 Oct/Nov 2018
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 |
|---|---|---|---|---|---|---|
| 28 | 24 | 21 | 18 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/22 Oct/Nov 2018 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/22 Oct/Nov 2018
- Question 1
Oxygen and fluorine are gaseous elements next to each other in the Periodic Table. Under the same conditions of temperature and pressure, oxygen diffuses 1 than fluorine because its 2 is less than that of fluorine. Which words correctly complete …
- Question 2
The diagrams show four pieces of laboratory equipment. thermometer stop-clock pipette balance Which equipment is essential to find out if dissolving a salt in water is an exothermic process? balance pipette stop-clock thermometer …
- Question 3
How many neutrons are present in the atom …
- Question 4
Two naturally occurring isotopes of oxygen are 16O and 17O. Which statement is correct? A Both isotopes react with iron to form rust. B Neither isotope reacts with iron to form rust. C Only 16O reacts with iron to form …
- Question 5
How many electrons are used to form covalent bonds in a molecule of methanol, CH3OH? …
- Question 6
Potassium bromide and methanol are both compounds. Their melting points are different. Which row is correct? substance with the higher melting point reason why the melting points are different A methanol the attractive forces between oppositely charged ions is greater …
- Question 7
Which gas sample contains the smallest number of molecules? …
- Question 8
The equation for the reaction between calcium carbonate and dilute nitric acid is shown. CaCO3(s) + 2HNO3(aq) → Ca(NO3)2(aq) + CO2(g) …
- Question 9
The formulae of some ions are shown. positive ion negative ion Ti4+ PO4 3– Al 3+ SO4 2– Mg2+ NO3 – K+ Cl – Which formula is not correct? A Al 3(SO4)2 B K3PO4 C Mg(NO3)2 D TiCl 4
- Question 10
Concentrated aqueous copper(II) chloride is electrolysed using copper electrodes as shown. + – copper electrodes aqueous copper(II) chloride power supply What happens to the mass of each electrode during this process? positive electrode negative electrode A decreases decreases B decreases …
- Question 11
The diagram shows a circuit used to electrolyse aqueous copper(II) sulfate. …
- Question 12
Hydrogen peroxide, H–O–O–H, decomposes to form water and oxygen. …
- Question 13
The equation for the formation of ammonia is shown. …
- Question 14
The rate of reaction between magnesium ribbon and 2 mol / dm3 hydrochloric acid at 25 °C to produce hydrogen gas is measured. In another experiment, either the concentration of the hydrochloric acid or the temperature is changed. All other …
- Question 15
Methanol is prepared by the reversible reaction shown. CO(g) + 2H2(g) CH3OH(g) The forward reaction is exothermic. Which conditions produce the highest equilibrium yield of methanol? temperature pressure A high high B high low C low high D low low
- Question 16
The thermite reaction can be used to produce iron from iron(III) oxide. The equation for the reaction is shown. 2Al + Fe2O3 → 2Fe + Al 2O3 Which statements about this reaction are correct? 1 Aluminium is the oxidising agent. …
- Question 17
In which row are the oxides correctly identified? acidic basic A magnesium oxide, calcium oxide sulfur dioxide, carbon dioxide B magnesium oxide, sulfur dioxide carbon dioxide, calcium oxide C sulfur dioxide, carbon dioxide calcium oxide, magnesium oxide D sulfur dioxide, …
- Question 18
When dilute sulfuric acid is added to solid X, a colourless solution is formed and a gas is produced. What is X? A copper(II) oxide B sodium oxide C copper(II) carbonate D sodium carbonate
- Question 19
A few drops of methyl orange are added to a reaction mixture. During the reaction, a gas is produced and the methyl orange turns from red to orange. What are the reactants? A aqueous sodium hydroxide and ammonium chloride B …
- Question 20
Some general rules for the solubility of salts in water are listed. ● Carbonates are insoluble (except ammonium carbonate, potassium carbonate and sodium carbonate). ● Chlorides are soluble (except lead(II) chloride and silver chloride). ● Nitrates are soluble. ● Sulfates …
- Question 21
Elements in Group I of the Periodic Table react with water. Which row describes the products made in the reaction and the trend in reactivity of the elements? products trend in reactivity A metal hydroxide and hydrogen less reactive down …
- Question 22
The equation shows the reaction between a halogen and aqueous bromide ions. X2 + 2Br– …
- Question 23
An inert gas R is used to fill weather balloons. Which descriptions of R are correct? number of outer shell electrons in atoms of R structure of gas …
- Question 24
Heating copper(II) carbonate produces copper(II) oxide and carbon dioxide. Heating the copper(II) oxide formed with carbon produces copper. Which processes are involved in this conversion of copper(II) carbonate to copper? A sublimation followed by oxidation B sublimation followed by reduction …
- Question 25
Four metals, W, X, Y and Z, are separately reacted with water and dilute hydrochloric acid. The results are shown. metal …
- Question 26
Which statement about the uses of metals is not correct? A Aluminium is used in aircraft because of its strength and good electrical conductivity. B Copper is used in electrical wiring because of its good electrical conductivity. C Stainless steel …
- Question 27
Bauxite contains aluminium oxide. Aluminium is extracted from aluminium oxide by electrolysis. Why is cryolite added to the electrolytic cell used to extract aluminium? A Cryolite prevents the carbon anodes being burned away. B Cryolite removes impurities from the bauxite. …
- Question 28
Which statement about the Haber process is correct? A The hydrogen used is obtained from the air. B The nitrogen used is obtained from nitrates in the soil. C Nitrogen reacts with hydrogen to make ammonia. D The reaction takes …
- Question 29
Which statements about sulfur dioxide pollution are correct? 1 It increases the pH of rivers. 2 It damages limestone buildings. 3 It causes respiratory problems. A 1 only B 2 only C 1 and …
- Question 30
Argon is a noble gas used to fill light bulbs. What is the approximate percentage of argon in air? …
- Question 31
The diagrams show experiments involving the rusting of iron. water boiled to remove the air water anhydrous calcium chloride to dry the air oil iron nails tube Q tube R tube P A student predicted the following results. 1 In …
- Question 32
In the carbon cycle, which two processes add carbon dioxide to the atmosphere? A combustion and carbonate formation B combustion and photosynthesis C combustion and respiration D respiration and photosynthesis
- Question 33
Which statement about sulfur or one of its compounds is correct? A Sulfur occurs naturally as the element sulfur. B Sulfur dioxide is used to kill bacteria in drinking water. C Sulfuric acid is a weak acid. D Dilute sulfuric …
- Question 34
What is not a use of lime? A It is used as a bleach in the manufacture of wood pulp. B It is used to desulfurise flue gases. C It is used to neutralise acidic industrial waste. D It is …
- Question 35
Which equation representing a reaction of methane is correct? A CH4 + Cl 2 → CH3Cl + HCl B CH4 + Cl 2 → CH4Cl 2 C CH4 + Cl 2 → CH2Cl …
- Question 36
Which two compounds are molecules which both contain a double bond? A ethane and ethanoic acid B ethane and ethanol C ethene and ethanoic acid D ethene and ethanol
- Question 37
Ethanol can be formed by: 1 fermentation 2 reaction between steam and ethene. Which of these processes use a catalyst? …
- Question 38
Ethanol is manufactured from ethene. What is an advantage of this process? A It is a continuous process. B It has high labour costs. C It needs high temperature and pressure. D It uses non-renewable materials.
- Question 39
Which reaction can be used to make ethanoic acid? A oxidation of ethanol B oxidation of ethene C reduction of ethanol D reduction of ethene
- Question 40
The structure of an addition polymer is shown. C H OH …
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