Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/13 May/June 2023 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 3, May/June 2023: 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
- 21
File names: 0620_s23_qp_13 · 0620_s23_ms_13
Grade thresholds for 0620/13 May/June 2023
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 |
|---|---|---|---|---|
| 21 | 18 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/13 May/June 2023 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/13 May/June 2023
- Question 1
Nitrogen is heated in a balloon, which expands slightly. Which statements about the molecules of nitrogen are correct? 1 They move further apart. 2 They move more quickly. 3 They remain the same distance apart. 4 Their speed remains unchanged. …
- Question 2
The diagrams represent some elements, compounds and mixtures. …
- Question 3
Two atoms, X and Y, have the same mass number but different atomic numbers. Which statement about X and Y is correct? A They have the same number of protons. B They have the same number of electrons. C They …
- Question 4
The symbols for two different isotopes of element S are shown. …
- Question 5
Which statement about potassium fluoride is correct? A It can conduct electricity when it is solid. B It dissolves in water. C It has a low melting point. D It is a molecule.
- Question 6
In which molecule are all the outer-shell electrons involved in covalent bonding? A Cl 2 B CH4 C HCl D NH3
- Question 7
What is the formula of potassium oxide? …
- Question 8
The compound magnesium nitrate has the formula Mg(NO3)2. What is the relative formula mass of magnesium nitrate? …
- Question 9
Dilute sulfuric acid is electrolysed using inert electrodes. What is produced at the anode? A hydrogen B oxygen C sulfur D sulfur dioxide
- Question 10
The flow diagram represents a hydrogen–oxygen fuel cell. fuel cell input 2 input 1 output 2 output 1 Which row shows the inputs and outputs? input 1 input 2 output 1 output 2 A electricity electrolyte hydrogen oxygen B electricity …
- Question 11
Which statement describes an exothermic reaction? A Thermal energy is transferred to the surroundings leading to a decrease in the temperature of the surroundings. B Thermal energy is transferred to the surroundings leading to an increase in the temperature of …
- Question 12
Which row shows the changes that all increase the rate of a chemical reaction? concentration of reactants temperature particle size A decrease decrease decrease B decrease increase increase C increase decrease increase D increase increase decrease
- Question 13
A student heats hydrated copper(II) sulfate. The blue crystals change to a white powder. How can the student reverse this reaction? A Add anhydrous copper(II) sulfate to the white powder. B Add water to the white powder. C Cool the …
- Question 14
Acidified aqueous potassium manganate(VII) is a purple solution. What does the (VII) in the name potassium manganate(VII) represent? A the charge on the potassium ion B the charge of the manganate ion C the number of ions in the compound …
- Question 15
Excess hydrochloric acid is added to aqueous sodium hydroxide containing thymolphthalein. Which colour change is observed? A blue to colourless B colourless to blue C red to yellow D yellow to red
- Question 16
Information about four oxides, …
- Question 17
Three methods of preparing salts are listed. 1 acid + metal 2 acid + metal carbonate 3 acid + metal oxide Which methods can be used to make copper(II) chloride? …
- Question 18
Which set of elements shows the change from metallic to non-metallic character across a period of the Periodic Table? A beryllium magnesium calcium B fluorine bromine iodine C oxygen boron lithium D sodium …
- Question 19
The diagram shows the reaction that occurs when potassium is dropped into water. …
- Question 20
Which statement about bromine is correct? A Bromine has a greater density than chlorine. B Bromine is a gas at room temperature and pressure. C Bromine has a grey-black colour. D Bromine is less reactive than iodine.
- Question 21
What is a typical property of transition elements? A can act as catalysts B poor electrical conductivity C low melting point D low density
- Question 22
Which description of elements in Group VIII of the Periodic Table is correct? A They are diatomic. B All atoms have eight outer electrons. C They have high melting points. D They are unreactive.
- Question 23
The flow chart shows some properties of four solid elements. Does it react with water to produce hydrogen? no yes element 1 Does it break into pieces when struck with a hammer? yes element 4 Does it conduct electricity? no …
- Question 24
Which statement about copper or aluminium is correct? A Aluminium is more dense than copper. B Aluminium is less reactive than copper. C Copper has high ductility. D Copper has poor electrical conductivity.
- Question 25
Water from a reservoir flows to the water works where purification process 1 takes place followed by process 2. What are processes 1 and 2? process 1 process 2 A chlorination filtration B filtration chlorination C fractional distillation filtration D …
- Question 26
Calcium reacts with cold water to produce hydrogen. Lead reacts slowly when heated in air to form an oxide but has almost no reaction with steam. Silver does not react with either air or water. Zinc reacts when heated with …
- Question 27
Which statement about rusting is correct? A Rust is anhydrous iron(II) oxide. B Oxygen is required for iron to rust. C Iron covered in grease rusts more quickly. D Iron rusts more quickly in the absence of air.
- Question 28
Which statements about the extraction of iron in a blast furnace are correct? 1 The temperature inside the blast furnace is increased by burning carbon. 2 Iron(III) oxide is reduced to iron by carbon monoxide. 3 The thermal decomposition of …
- Question 29
Which statements about water are correct? 1 Tap water has fewer impurities than distilled water. 2 Tap water will turn anhydrous cobalt(II) chloride pink. 3 The domestic water supply is treated with carbon to kill microbes. 4 Phosphates from fertilisers …
- Question 30
Which substance is used by farmers to improve plant growth? A ammonium nitrate B phosphoric acid C potassium D sodium oxide
- Question 31
Three air pollutants, X, Y and Z, are described. X is a toxic gas formed by the incomplete combustion of an alkane. Y is formed by decomposing vegetation and increases global warming. Z is a cause of breathing problems and …
- Question 32
The displayed formula of an organic compound is shown. …
- Question 33
Kerosene is one of the fractions of petroleum. What is kerosene used for? A jet fuel B petrol C road making D waxes
- Question 34
A hydrocarbon P is cracked to make compound Q and hydrogen. Compound R is formed by the addition polymerisation of compound Q. To which homologous series do P, Q and R belong? alkene alkane A P only Q and …
- Question 35
Which process involves combustion? (Some of the reaction products are not shown on the diagram.) sugar + yeast in water ethanol carbon dioxide ethene poly(ethene) …
- Question 36
What are the products when ethanoic acid reacts with aqueous sodium hydroxide? A carbon dioxide and water B carbon dioxide and sodium ethanoate C sodium ethanoate and hydrogen D sodium ethanoate and water
- Question 37
Which statements are correct? 1 The polymer of ethene is poly(ethane). 2 Monomers are small molecules. 3 Monomers join together to form polymers. A 1 and …
- Question 38
Dilute hydrochloric acid is titrated into a conical flask containing sodium hydroxide solution and a few drops of methyl orange indicator. Which piece of apparatus is used to add the hydrochloric acid? A beaker B burette C measuring cylinder D …
- Question 39
What could be the melting point and boiling point of water containing a dissolved impurity? melting point / C boiling point …
- Question 40
Element X burns in air to form an acidic gas that decolourises potassium manganate(VII). What is X? A carbon B nitrogen C magnesium D sulfur Group The Periodic Table of Elements 1 H hydrogen 1 2 He helium 4 I …
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