Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/11 Oct/Nov 2025 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 1, Oct/Nov 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_w25_qp_11 · 0620_w25_ms_11
Grade thresholds for 0620/11 Oct/Nov 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 | 20 | 17 | 15 | 13 |
Topics in this paper
Which syllabus chapters 0620/11 Oct/Nov 2025 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/11 Oct/Nov 2025
- Question 1
Which process describes the movement of a substance very slowly from an area of high concentration to an area of low concentration? A a liquid being frozen B a solid melting C a substance diffusing through a liquid D a …
- Question 2
The atomic number and nucleon number of a potassium atom are shown. atomic number 19 nucleon number 39 How many protons, neutrons and electrons are in the potassium ion, K+, which is formed from this potassium atom? protons neutrons electrons …
- Question 3
Magnesium is in Group II and Period 3 of the Periodic Table. Which row shows the charge on a magnesium ion and the electronic configuration of a magnesium ion? charge electronic configuration …
- Question 4
Sodium is in Group I of the Periodic Table. Chlorine is in Group VII of the Periodic Table. Sodium and chlorine combine to form a compound. Which statement about the combination of sodium and chlorine atoms is correct? A Both …
- Question 5
Strontium nitrate is an ionic compound. Cyclohexane is a covalent compound. Which row describes a property of each compound? strontium nitrate cyclohexane A conducts electricity in aqueous solution low boiling point B low melting point insoluble in water C soluble …
- Question 6
Which element forms covalent bonds with hydrogen? A magnesium B neon C nitrogen D sodium
- Question 7
Which statement about graphite and diamond is correct? A Diamond has a high melting point but graphite does not. B Graphite and diamond both conduct electricity. C Graphite and diamond both have giant structures. D Graphite is ionic and diamond …
- Question 8
Carbon dioxide gas reacts with aqueous calcium hydroxide to form calcium carbonate. Which equation represents this reaction? A CO2(g) + Ca(OH)2(aq) CaCO3(s) …
- Question 9
The equation for the combustion of magnesium is shown. 2Mg …
- Question 10
Which row identifies the product at each electrode when molten zinc chloride is electrolysed using inert electrodes? positive electrode negative electrode A O2 Zn B Cl 2 Zn C Zn Cl 2 D Zn O2
- Question 11
Which equation represents the reaction in a hydrogen–oxygen fuel cell? …
- Question 12
What is always produced when a fuel is burned? A carbon dioxide B carbon monoxide C oxides of nitrogen D thermal energy
- Question 13
The reaction pathway diagram shows the energy of the reactants and products in a chemical reaction. reactants progress of reaction products energy Which row describes the enthalpy change and the type of reaction shown? description of energy change type of …
- Question 14
Magnesium is reacted with dilute hydrochloric acid of the same concentration in four experiments using different conditions. Which reaction finished in the shortest time? …
- Question 15
Blue hydrated copper(II) sulfate produces a white solid when it is heated. The white solid turns blue when water is added. Which word describes the reaction of hydrated copper(II) sulfate? A neutralisation B oxidation C reduction D reversible
- Question 16
Iron(III) chloride, FeCl 3, is a brown solid. What is the meaning of (III) in the name? A It is the amount of energy released when the compound was formed. B It is the rate of the reaction that formed …
- Question 17
What are the units of concentration? A mol / dm3 …
- Question 18
Which pair of reactants are both soluble in water and mix to form a precipitate? A NaCl and Mg(NO3)2 B BaSO4 and K2CO3 C CaCl 2 and NaNO3 D Pb(NO3)2 and KCl
- Question 19
Four oxides are listed. 1 lithium oxide 2 phosphorus oxide 3 sodium oxide 4 sulfur dioxide Which oxides are basic? A 1 and …
- Question 20
Cobalt is a typical transition element. Which statement about cobalt is correct? A Cobalt has a low density. B Cobalt has a low melting point. C Cobalt can form only colourless compounds. D Cobalt can act as a catalyst.
- Question 21
Which diagrams show the electronic configuration for an atom of a noble gas? …
- Question 22
Which statement describes the alloy brass? A It is a mixture of iron and nickel. B It is a mixture of iron compounds. C It is a compound of copper, zinc and non-metals. D It is a mixture of the …
- Question 23
The results of the reaction of metals …
- Question 24
Some methods of preventing iron from rusting are listed. 1 alloying with chromium 2 greasing 3 painting Which methods are barrier methods? A 1 and …
- Question 25
Which metal is extracted from bauxite by electrolysis? A aluminium B copper C iron D zinc
- Question 26
Which statement about water is correct? A When water is added to solid anhydrous cobalt(II) chloride, the solid turns blue. B Water containing dissolved sodium chloride boils at a temperature greater than …
- Question 27
What is the structure of ethanol? …
- Question 28
Which statement about alkanes is correct? A They contain carbon, hydrogen and oxygen only. B They are saturated compounds with only single ionic bonds. C The alkanes with longer chain lengths are more volatile. D They react with chlorine in …
- Question 29
Which row identifies an adverse effect of the named pollutant? air pollutant adverse effect A methane global warming B sulfur dioxide cancer C particulates acid rain D carbon monoxide photochemical smog
- Question 30
Which group of compounds have the same general formula? A CH4, …
- Question 31
Some fractions obtained from petroleum are listed. fraction use position collected in the fractionating column 1 gasoline waxes and polishes below refinery gas 2 bitumen making roads above kerosene 3 kerosene jet fuel below gasoline 4 refinery gas heating and …
- Question 32
Four different substances or types of substance are listed. 1 hydrogen 2 alcohols 3 alkenes 4 carboxylic acids Which substances are produced by cracking larger alkane molecules? A 1 and …
- Question 33
Which row shows the conditions used to manufacture ethanol from ethene and steam? temperature / °C pressure / kPa …
- Question 34
Which statement about aqueous ethanoic acid is correct? A It reacts with metal carbonates to form salts, hydrogen and water. B It reacts with metal oxides to form salts and oxygen. C It reacts with reactive metals to form salts …
- Question 35
The equation represents a polymerisation reaction. CH2 CH2 n CH2 CH2 n Which statements are correct? 1 The monomer is ethane. 2 The reaction is addition polymerisation. 3 The polymer does not easily decompose. A 1 and …
- Question 36
A sample of wax is heated. It begins to melt at 45 °C and finishes melting at …
- Question 37
Four dyes, P, Q, R and S, are analysed using chromatography. Water is the solvent. The chromatogram produced is shown. solvent front baseline …
- Question 38
The apparatus used to separate a mixture is shown. mixture funnel filter paper What is the mixture? A aqueous calcium chloride and aqueous calcium nitrate B copper(II) hydroxide and aqueous calcium chloride C ethanol and water D sand and calcium …
- Question 39
Two different white solids are heated and the gases formed are tested. The gas from solid 1 turns damp red litmus paper blue. The gas from solid 2 relights a glowing splint. Which row identifies the gases formed from each …
- Question 40
Which aqueous ion gives a blue precipitate when aqueous sodium hydroxide is added? A Ca2+ B Cr3+ C Cu2+ D Fe2+ Group The Periodic Table of Elements 1 H hydrogen 1 2 He helium 4 I II III IV V …
Other Chemistry papers from Oct/Nov 2025
- 0620/12 Multiple choice (Core)
- 0620/13 Multiple choice (Core)
- 0620/21 Multiple choice (Extended)
- 0620/22 Multiple choice (Extended)
- 0620/23 Multiple choice (Extended)
- 0620/31 Theory (Core)
- 0620/32 Theory (Core)
- 0620/33 Theory (Core)
- 0620/41 Theory (Extended)
- 0620/42 Theory (Extended)
- 0620/43 Theory (Extended)
- 0620/61 Alternative to Practical
- 0620/62 Alternative to Practical
- 0620/63 Alternative to Practical