Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/23 May/June 2023 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), 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
- 26
File names: 0620_s23_qp_23 · 0620_s23_ms_23
Grade thresholds for 0620/23 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 | F | G |
|---|---|---|---|---|---|---|
| 26 | 21 | 16 | 15 | 13 | 12 | 11 |
Topics in this paper
Which syllabus chapters 0620/23 May/June 2023 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/23 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
A sample of pure iron contains three isotopes only. percentage abundance of isotope / % isotope 2 nFe 6 54Fe 92 56Fe The iron in the sample has a relative atomic mass of 55.9. What is the value of …
- Question 5
Magnesium oxide is a white solid at room temperature and pressure. Part of the structure of solid magnesium oxide is shown. key = Mg2+ magnesium ion = O2– oxide ion Three statements are listed. 1 Magnesium ions are smaller than …
- 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
Which row describes the properties of silicon(IV) oxide? giant covalent structure melting point A no high B no low C yes high D yes low
- Question 8
Which row describes the structure of a solid metal and explains the property? structure of solid metal property of solid metal A lattice of negative ions in a sea of electrons conducts electricity because the electrons are free to move …
- Question 9
What is the formula of potassium oxide? …
- Question 10
A dilute aqueous solution of sodium bromide is electrolysed using inert electrodes. Which row identifies the product at the cathode and at the anode? cathode anode A bromine hydrogen B hydrogen bromine C hydrogen oxygen D oxygen hydrogen
- Question 11
Aluminium is extracted by electrolysis, as shown. …
- Question 12
The reaction pathway diagram for an exothermic reaction is shown. energy progress of reaction …
- Question 13
The equation for the complete combustion of ethene is shown. …
- Question 14
Magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen. Why does magnesium powder react faster than magnesium ribbon? A The magnesium atoms in the powder have a lower activation energy. B The powder has a smaller surface area. …
- Question 15
Which row shows the conditions used in the Contact process? catalyst pressure / atm temperature …
- Question 16
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 17
Which reaction of hydrochloric acid is a redox reaction? A MgCO3 + 2HCl MgCl …
- Question 18
Which oxide is amphoteric? A Al 2O3 B CaO C Na2O D SO2
- Question 19
Four statements about strong acids are listed. 1 They react with carbonates to form carbon dioxide. 2 They completely dissociate in aqueous solution. 3 They react with ammonium salts to form ammonia. 4 They are proton acceptors. Which statements are …
- Question 20
Which reaction mixture will produce a precipitate? A aqueous Na2CO3 and aqueous CuSO4 B dilute H2SO4 and aqueous NaOH C dilute HNO3 and solid MgO D solid CuO and dilute H2SO4
- Question 21
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 22
A sample of ethanoic acid and a sample of hydrochloric acid have the same concentration. How do the hydrogen ion concentration and pH of ethanoic acid compare to those of hydrochloric acid? ethanoic acid compared to hydrochloric acid hydrogen ion …
- Question 23
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 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
Blocks of magnesium are attached to the bottom of a steel boat to prevent rusting. Which equation describes a change that prevents the steel from rusting? A Fe Fe3+ …
- 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
Oxides of nitrogen form in car engines and are removed by catalytic converters. Which equation represents a reaction that occurs in a catalytic converter? A CO + NO2 NO + CO2 B 2CO + 2NO …
- Question 31
An alkene is represented by the formula CH3CH=CH2. Which name is given to this type of formula? A displayed B empirical C general D structural
- Question 32
What is the structure of propanoic acid? …
- Question 33
Butane reacts with chlorine in the presence of ultraviolet radiation. What is the equation for this reaction? …
- 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 substances are structural isomers? A but-2-ene and propene B ethyl ethanoate and butanoic acid C methyl methanoate and ethanol D propan-1-ol and butan-1-ol
- Question 36
Ethanol is produced by: 1 the catalytic addition of steam to ethene 2 fermentation. Which statement is correct? A Both processes use similar amounts of energy. B Both processes use a catalyst. C Process 1 uses a temperature of …
- Question 37
The two monomers shown can be used to form a condensation polymer. …
- 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
The chromatogram obtained from a chromatography experiment on substance S is shown. 4.5 cm 4.7 cm 6.0 cm 1.8 cm solvent front baseline S What is the Rf value of …
- 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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