Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/11 May/June 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 1, 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
- 22
File names: 0620_s25_qp_11 · 0620_s25_ms_11
Grade thresholds for 0620/11 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 |
|---|---|---|---|---|
| 22 | 19 | 16 | 14 | 11 |
Topics in this paper
Which syllabus chapters 0620/11 May/June 2025 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/11 May/June 2025
- Question 1
Which process happens when water vapour changes to rain? A boiling B condensing C evaporating D freezing
- Question 2
The diagrams show the arrangement of particles in three different states of matter. state 2 state 1 state 3 Which row describes the change in energy of the particles and in particle motion for the given change in state? change …
- Question 3
An atom of element Q contains 19 electrons, 19 protons and 20 neutrons. What is Q? A calcium B potassium C strontium D yttrium
- Question 4
Which part of an atom has a relative mass of 1 and a relative charge of 0? A electron B neutron C nucleus D proton
- Question 5
Which row identifies the number of electrons, neutrons and protons in a particle which is an isotope of …
- Question 6
Which statements about potassium iodide are correct? 1 It is formed from potassium anions and iodide cations. 2 It is a good electrical conductor when molten or in aqueous solution. 3 Potassium atoms share electrons with iodine atoms. A 1 …
- Question 7
Which substances contain one or more shared pairs of electrons? 1 argon 2 methane 3 iron(III) oxide 4 chlorine A 1 and …
- Question 8
Which substance has a giant covalent structure at room temperature and pressure? A ammonia B carbon dioxide C diamond D water
- Question 9
Which row shows the correct formula for the named substance? substance formula A cobalt(II) chloride Cu2Cl B sodium carbonate Na2CO3 C xenon Xe2 D ammonium sulfate NH4SO4
- Question 10
The equation shows the thermal decomposition of magnesium carbonate. MgCO3 MgO + CO2 [Mr: MgCO3, 84] Which mass of magnesium oxide is formed when 21.0 g of magnesium carbonate is completely decomposed? …
- Question 11
Concentrated aqueous sodium chloride is electrolysed using inert electrodes. What is the main product formed at the positive electrode (anode)? A chlorine B hydrogen C oxygen D sodium
- Question 12
A hydrogen–oxygen fuel cell uses 630 dm3 of oxygen. The oxygen for the reaction is extracted from clean, dry air. What is the minimum volume of clean, dry air needed to provide this volume of oxygen? A 788 dm3 B …
- Question 13
Three statements about energy changes in chemical reactions are listed. 1 In an endothermic reaction, the temperature of the surroundings increases. 2 In an exothermic reaction, thermal energy is taken in from the surroundings. 3 In the reaction pathway diagram …
- Question 14
When a small piece of a Group I metal is placed into a large beaker of cold water, a reaction occurs. Four statements about this reaction are listed. 1 The metal melts. 2 Hydrogen is produced. 3 Steam is produced. …
- Question 15
The equation for the decomposition of hydrogen peroxide is shown. …
- Question 16
The equation for the reaction between copper(II) oxide and carbon is shown. 2CuO …
- Question 17
Which row gives the colours observed when thymolphthalein and methyl orange are added separately to the named solution? solution colour with thymolphthalein colour with methyl orange A dilute HCl colourless yellow B dilute HCl blue red C aqueous NaOH colourless …
- Question 18
A mixture of two substances, R and S, is heated gently. The damp red litmus paper turns blue. damp red litmus paper R and S gentle heat What are R and …
- Question 19
Which reactants are used to make the salt copper(II) sulfate? A dilute acid + alkali B dilute acid + metal carbonate C dilute acid + metal D dilute acid + non-metal oxide
- Question 20
Which statement about the Periodic Table is correct? A The elements are arranged in order of increasing relative atomic mass. B The reactivity of the elements in Group I and in Group VII increases as the groups are descended. C …
- Question 21
Part of the Periodic Table is shown. Which element shows the most metallic character? …
- Question 22
E is an element from Group I of the Periodic Table. Two properties of E are listed. ● It has a higher melting point than caesium. ● It has a lower density than sodium. What is the identity of E? …
- Question 23
An equation for the displacement reaction between aqueous halogen, X2, and aqueous halide ions, Y–, is shown. X2(aq) + 2Y–(aq) 2X–(aq) + Y2(aq) Which row identifies X2 and Y– and explains why the reaction takes place? X2 Y– explanation …
- Question 24
Some information about an element is shown. melting point …
- Question 25
The table shows the observations when four metals, …
- Question 26
Magnesium is reacted separately with dilute sulfuric acid and with steam. Which row correctly identifies if hydrogen is formed as a product in each reaction? reaction with dilute sulfuric acid reaction with steam …
- Question 27
Which statements about aluminium are correct? 1 It is more reactive than calcium. 2 The main ore of aluminium is bauxite. 3 It can be extracted from its oxide using carbon. 4 Brass is an alloy of aluminium and copper. …
- Question 28
Steel is a mixture of iron and one or more other elements. The table gives some information about three common types of steel. type of steel elements added to iron properties 1 high-carbon steel carbon only strong, brittle and corrodes …
- Question 29
The diagram shows an experiment to investigate the corrosion of iron. iron air water greased iron Q P What happens to the water level in tubes P and Q? tube P tube Q A rises falls B no change rises …
- Question 30
Fertilisers are used to provide the three elements needed for improved plant growth. Which two compounds would provide all three of these elements? A ammonium nitrate and calcium phosphate B ammonium nitrate and potassium sulfate C potassium nitrate and calcium …
- Question 31
Which substances can be used to detect the presence of water? 1 anhydrous cobalt(II) chloride 2 anhydrous copper(II) sulfate 3 litmus 4 methyl orange A 1 and …
- Question 32
What is produced by the incomplete combustion of methane? A carbon monoxide B hydrogen C lead compounds D sulfur dioxide
- Question 33
Which row identifies compounds in the same homologous series? chemical properties functional group A different different B different same C similar different D similar same
- Question 34
The molecular formula of compound Z is C4H10. Which row identifies the substance that reacts with Z and describes the type of reaction that occurs? substance type of reaction A chlorine addition B chlorine substitution C steam addition D steam …
- Question 35
Which list shows the fractions obtained from the fractional distillation of petroleum, in order of increasing boiling point? A bitumen diesel oil fuel oil lubricating oil B diesel oil gasoline naphtha kerosene C gasoline …
- Question 36
Three statements about cracking of larger alkane molecules are listed. 1 Cracking produces petrol for cars. 2 Cracking only produces short-chain alkenes. 3 Cracking produces alkenes used to make polymers. Which statements are correct? …
- Question 37
Some words used to describe organic compounds are listed. 1 hydrocarbon 2 monomer 3 saturated 4 unreactive Which words describe ethene? A 1 and …
- Question 38
A student measures 25.00 cm3 of dilute hydrochloric acid accurately. Which piece of apparatus is most suitable? A beaker B measuring cylinder C burette D dropping pipette
- Question 39
Excess solid magnesium oxide is added to dilute nitric acid. Which separation technique is used to remove the excess solid magnesium oxide after the reaction finishes? A chromatography B crystallisation C distillation D filtration
- Question 40
Four different aqueous metal nitrates are tested separately with aqueous sodium hydroxide, with dilute sulfuric acid and with a flame test. Which row shows the correct set of results for the named aqueous metal nitrate? aqueous metal nitrate with aqueous …
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