Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/13 May/June 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 3, 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
- 24
File names: 0620_s25_qp_13 · 0620_s25_ms_13
Grade thresholds for 0620/13 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 |
|---|---|---|---|---|
| 24 | 21 | 18 | 15 | 12 |
Topics in this paper
Which syllabus chapters 0620/13 May/June 2025 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/13 May/June 2025
- Question 1
Liquid iron is cooled to form solid iron. Which statement about the particles in iron is correct? A The particles move further apart. B The particles move faster. C The position of the particles becomes fixed. D The attractions between …
- Question 2
Which diagram shows a mixture of an element and a compound? …
- Question 3
Which statement about elements and their atoms is correct? A Aluminium is in the second period of the Periodic Table and has two occupied electron shells. B Helium is in Group VIII of the Periodic Table and has eight outer …
- Question 4
An atom of the element erbium is represented by Er. 167 68 Which row shows the number of protons, neutrons and electrons in this atom? protons neutrons electrons …
- Question 5
Rubidium is in Group I of the Periodic Table and bromine is in Group VII of the Periodic Table. Rubidium reacts with bromine to form an ionic compound. Which row shows the electron change taking place for rubidium and the …
- Question 6
Which dot-and-cross diagram represents the electronic configuration for the outer shell electrons in ammonia, NH3? …
- Question 7
Which statements about graphite are correct? 1 Each carbon atom is covalently bonded to four other carbon atoms. 2 Graphite is an electrical conductor because it contains ions that are free to move. 3 Graphite is used as a lubricant …
- Question 8
Which equation represents the reaction of magnesium with dilute hydrochloric acid? A Mg(s) + 2HCl (aq) MgCl 2(aq) …
- Question 9
The relative formula mass, Mr, of calcium carbonate, CaCO3, is 100. What is the mass of carbon present in 100 g of calcium carbonate? …
- Question 10
What is the definition of relative atomic mass? A It is the average mass of the isotopes of an element compared to th 12 1 of the mass of an atom of 12C. B It is the total mass of …
- Question 11
Which row describes the electrolysis of molten potassium bromide? product at anode product at cathode A bromine hydrogen B bromine potassium C hydrogen bromine D potassium bromine
- Question 12
What is produced in a hydrogen–oxygen fuel cell? A hydrogen and oxygen B hydrogen only C carbon dioxide D water
- Question 13
When ammonium nitrate is added to water, the temperature of the mixture decreases. The ammonium nitrate can be recovered by evaporating the water. Which statement explains these observations? A The ammonium nitrate dissolves in the water, and the process is …
- Question 14
Magnesium is reacted with dilute hydrochloric acid. The table shows the total volume of hydrogen produced every 15 seconds. time …
- Question 15
Which substance forms a blue solution when it is added to water? A cobalt(II) chloride B copper(II) sulfate C thymolphthalein D universal indicator
- Question 16
Steam reacts with carbon to produce carbon monoxide and hydrogen. …
- Question 17
Three compounds are listed. 1 aluminium nitrate 2 ammonium chloride 3 ammonium nitrate All three compounds are heated with aqueous sodium hydroxide. Which compounds produce ammonia? A 1 and …
- Question 18
A solution containing hydroxide ions, OH–(aq), is added to a solution containing hydrogen ions, H+(aq). An equation representing the reaction is shown. H+(aq) + OH–(aq) H2O(l) Which statement about the reaction is correct? A The hydrogen ions represent an …
- Question 19
Which compound is an acidic oxide? A barium oxide B carbon dioxide C copper(II) oxide D magnesium oxide
- Question 20
Which statement describes a hydrated salt? A It is an aqueous solution of a salt. B It is a solid salt that is chemically combined with water. C It is a solid salt that contains no water. D It is …
- Question 21
In the Periodic Table, how does the metallic character of the elements vary from left to right across a period? A It decreases. B It increases. C It increases then decreases. D It stays the same.
- Question 22
Lithium, sodium and potassium are elements in Group I of the Periodic Table. Which statements about these elements are correct? 1 They react with water to produce hydrogen. 2 The melting point increases down the group. 3 The density decreases …
- Question 23
X, Y and Z are each one of the elements chlorine, bromine and iodine. When aqueous X is mixed with aqueous ions of Y, there is no reaction. When aqueous Y is mixed with aqueous ions of Z, there is …
- Question 24
Which row describes the properties of a transition element? melting point / °C density at r.t.p. colour and state of its oxide at …
- Question 25
Which statements about the elements in Group VIII are correct? 1 They all have eight electrons in their outer electron shell. 2 They all react with sodium to form ionic compounds. 3 They are all monatomic gases. A 1 and …
- Question 26
Sulfur and potassium are two elements in the Periodic Table. Which row identifies the element with the higher thermal conductivity and the element with the lower malleability? higher thermal conductivity lower malleability A sulfur potassium B sulfur sulfur C potassium …
- Question 27
Three statements about aluminium and copper are listed. 1 The density of aluminium is less than that of copper. 2 The electrical conductivity of copper is higher than that of aluminium. 3 Aluminium is more reactive than copper. Which statements …
- Question 28
The table gives some information about the reactions of four metals, …
- Question 29
What is the chemical name for rust? A anhydrous iron(II) oxide B anhydrous iron(III) oxide C hydrated iron(II) oxide D hydrated iron(III) oxide
- Question 30
Water from natural sources can contain many dissolved substances. Which substances are often harmful to aquatic life? 1 dissolved oxygen 2 nitrates 3 phosphates …
- Question 31
Which gas is over 30% of clean, dry air? A argon B carbon dioxide C nitrogen D oxygen
- Question 32
Farmers use fertilisers to replace elements in the soil that have been removed by the crops they grow. Which elements in the soil are replaced by adding fertilisers? A Ca, …
- Question 33
The equation for the reaction between carbon dioxide and water in the presence of chlorophyll and sunlight is shown. carbon dioxide + water glucose + oxygen chlorophyll sunlight Which process does this equation represent? A combustion B decomposition C displacement …
- Question 34
Which statement about members of a homologous series is correct? A They are elements with the same chemical properties. B They are compounds with the same functional group. C They are atoms with the same number of outer shell electrons. …
- Question 35
The molecular formulae of four organic compounds, …
- Question 36
Fractional distillation is used to separate petroleum into useful fractions. Which statement about the properties of the fractions of petroleum is correct? A The refinery gas fraction has a lower volatility than the gasoline fraction. B The molecules in the …
- Question 37
Which statements about the alkanes are correct? 1 They are generally unreactive except in terms of combustion and substitution by chlorine. 2 They have the general formula CnH2n+2. 3 They contain double carbon–carbon covalent bonds. 4 They decolourise aqueous bromine. …
- Question 38
Which products can be formed by the cracking of one molecule of hexane, …
- Question 39
Three coloured inks, P, Q and R, are tested using paper chromatography. The chromatogram is shown. …
- Question 40
The table shows the results of two separate tests on a sample of aqueous T. test observation flame test yellow flame add dilute nitric acid effervescence What is the identity of T? A sodium chloride B calcium chloride C sodium …
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