Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/12 May/June 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 2, May/June 2025: 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
- 23
File names: 0620_s25_qp_12 · 0620_s25_ms_12
Grade thresholds for 0620/12 May/June 2025
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 |
|---|---|---|---|---|
| 23 | 21 | 19 | 16 | 13 |
Topics in this paper
Which syllabus chapters 0620/12 May/June 2025 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/12 May/June 2025
- Question 1
Substance L melts at –7 °C and is a brown liquid at room temperature. What is the boiling point of pure …
- Question 2
Which row describes how the volume of a gas changes when its temperature is increased at constant pressure and when its pressure is increased at constant temperature? temperature is increased at constant pressure pressure is increased at constant temperature A …
- Question 3
Nitrogen dioxide is a red-brown gas which is more dense than air. The diagram shows the arrangement of two gas jars which contain nitrogen dioxide and air separated with a glass plate. colourless air glass plate red-brown nitrogen dioxide The …
- Question 4
Which substance is a mixture of one element and one compound? A aqueous glucose B clean, dry air C oxygen dissolved in distilled water D stainless steel
- Question 5
Which statement defines the atomic number of an element? A the group number of the element B the mass of one atom of the element C the number of particles in the nucleus of one atom of the element D …
- Question 6
What is different for isotopes of the same element? A nucleon number B number of electron shells C number of electrons in the outer electron shell D proton number
- Question 7
When sodium chloride is formed from its elements, each chlorine atom 1 one 2 . Which words correctly complete gaps 1 and …
- Question 8
In the molecules CH4, HCl and H2O, which atoms use all of their outer shell electrons in bonding? A C and Cl B C and H C Cl and …
- Question 9
Which substance has a giant covalent structure? A sodium chloride B ammonia C magnesium chloride D graphite
- Question 10
The diagrams show the structures of four molecules. …
- Question 11
The equation for the reaction of magnesium with oxygen is shown. 2Mg …
- Question 12
The diagram shows a simple electrolytic cell for an electrolysis experiment. …
- Question 13
Which equation represents the overall reaction that produces electricity in a hydrogen–oxygen fuel cell? …
- Question 14
Which reaction pathway diagram shows the largest increase in the temperature of the surroundings? (The scale on the y-axis is the same in each diagram.) reactants products reactants products energy progress of reaction A reactants products reactants products energy progress …
- Question 15
Which process involves a chemical change? A dissolving copper(II) sulfate B distilling ethanol C freezing water D neutralising copper(II) oxide
- Question 16
The total volume of gas produced in two different experiments is measured against time. A graph of the results of the two experiments is shown. Which point shows the fastest rate of reaction? total volume of gas time 0 0 …
- Question 17
The equation for the reaction of sulfur dioxide with oxygen is shown. 2SO2 + O2 2SO3 What is meant by the symbol ? A redox reaction B reversible reaction C displacement reaction D thermal decomposition reaction
- Question 18
Which reactions are redox reactions? 1 the incomplete combustion of propane 2 the rusting of iron 3 the reaction of aqueous chloride ions with acidified aqueous silver nitrate 4 the thermal decomposition of calcium carbonate A 1 and …
- Question 19
Which row describes an aqueous solution for the pH shown? pH description A 1 has a very high alkalinity B 5 is neutral C 9 turns universal indicator yellow D 14 contains OH– ions
- Question 20
Which parts of the Periodic Table contain elements that only form basic oxides? A Group I and Period 3 B Group I only C Group VIII and Period 3 D Group VIII only
- Question 21
Which statement about elements in the Periodic Table is correct? A Elements in the same group of the Periodic Table have the same electronic configuration. B The atoms of the elements in Group VII form ions with a charge equal …
- Question 22
Which row identifies the trends in properties of the elements lithium to sodium to potassium? melting point density reactivity A decreasing increasing increasing B increasing increasing decreasing C increasing decreasing increasing D decreasing decreasing increasing
- Question 23
Which statements about the halogens are correct? 1 They are all diatomic molecules. 2 They are all gases at room temperature and pressure. 3 The density of the elements increases down the group. 4 The reactivity of the elements increases …
- Question 24
Zirconium is a transition element. What is a property of zirconium? A high density B does not conduct heat C forms white compounds only D low melting point
- Question 25
Some gases exist as single atoms, are unreactive and have eight electrons in their outer electron shell. Which gases fit this description? 1 helium 2 argon 3 oxygen 4 krypton …
- Question 26
Which statements about metals are correct? 1 Calcium reacts faster than magnesium with cold water. 2 Aluminium is more easily extracted than iron from its ore. 3 Copper reacts faster than iron with dilute hydrochloric acid. 4 Potassium and silver …
- Question 27
Four metals, P, Q, R and S, are separately reacted with dilute hydrochloric acid. The table shows the observation for each metal. metal observation P lots of bubbles produced Q few bubbles produced R no bubbles produced S very few …
- Question 28
The diagram shows iron nails which are left for one week in separate test-tubes with the conditions shown. 1 iron nail water 2 iron nail clean, dry air 3 iron nail oil boiled water rubber stopper Which test-tubes show evidence …
- Question 29
Pure metals can be combined to make alloys. Why are the alloys sometimes used rather than the metals they are made from? A Alloys are easier to extract and cheaper. B Alloys are easier to hammer into different shapes. C …
- Question 30
In the experiment shown, 100 cm3 of clean, dry air is passed backwards and forwards through a tube containing heated copper until there is no further decrease in the volume of the air. heat gas syringe air copper All of …
- Question 31
Sulfur dioxide, carbon monoxide and oxides of nitrogen are gaseous pollutants found in the air. Which pollutants contribute to acid rain? A carbon monoxide and sulfur dioxide B oxides of nitrogen and sulfur dioxide C oxides of nitrogen only D …
- Question 32
The formulae for three organic compounds are listed. …
- Question 33
Which fuel could be gasoline? Is it obtained from petroleum? Is it used as fuel for cars? Is it used as fuel for cars? no yes no yes …
- Question 34
Three hydrocarbons are separately mixed with aqueous bromine. Which row gives the correct observation for each hydrocarbon? …
- Question 35
Which compound is formed when ethene reacts with steam? A ethane B ethanoic acid C ethanol D poly(ethene)
- Question 36
Which statements about ethanoic acid are correct? 1 Its aqueous solution has a pH value of 10. 2 It reacts with metal carbonates to produce carbon dioxide gas. 3 It reacts with magnesium metal to produce hydrogen gas. …
- Question 37
Which statement explains why plastic bags made from poly(ethene) accumulate in oceans? A Poly(ethene) is a saturated molecule. B Poly(ethene) is made from hydrocarbon monomers. C Poly(ethene) reacts with water. D Poly(ethene) does not decompose in water.
- Question 38
Which diagram shows the correct level of solvent at the start of a chromatography experiment? B spot of sample level of solvent A spot of sample level of solvent D spot of sample level of solvent C spot of sample …
- Question 39
Which process is used to separate a mixture of liquids with different boiling points? A dissolving B crystallisation C filtration D fractional distillation
- Question 40
Four different colourless solutions are each tested separately with aqueous sodium hydroxide and with acidified aqueous silver nitrate. Which row shows the results for sodium chloride? aqueous sodium hydroxide acidified aqueous silver nitrate A no visible reaction white precipitate B …
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