IGCSE Chemistry 0620 Paper 13, May/June 2026

Which statement about solids, liquids or gases is correct? A Liquids are easy to compress. B Solids are easy to compress. C Gases expand to fill their container. D Liquids expand to fill their container.

Which statement describes a compound? A It contains two or more elements chemically combined. B It contains two or more elements physically combined. C It contains two or more elements forming an alloy. D It contains two or more elements that can easily be separated.

Four statements about particles in an atom are listed. 1 Protons and neutrons have the same relative mass and different relative charges. 2 Protons and neutrons have different relative masses and the same relative charge. 3 Protons and electrons have the same relative mass and different relative charges. 4 Protons and electrons have different relative masses and different relative charges. Which statements are correct? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

Which statement about the atomic structure of the named element is correct? A Antimony, Sb, has only four occupied electron shells. B Selenium, Se, has only six electrons in its third electron shell. C Strontium, Sr, has four outer-shell electrons. D Xenon, Xe, has five fully occupied electron shells.

An atom of element X has 20 protons and 20 neutrons. An atom of element Y has 19 electrons and a nucleon number of 40. Which statement is correct? A X is an isotope of argon. B X is an isotope of neon. C Y is an isotope of potassium. D Y is an isotope of zirconium.

Which dot-and-cross diagram represents the bonding in sodium chloride?

The formula of ammonia is ${\mathrm{N}\mathrm{H}}_3$. Which statement about a molecule of ammonia is correct? A The bonding in a molecule of ammonia is ionic. B The nitrogen atom has a noble gas configuration; the hydrogen atoms do not. C The nitrogen atom shares all of its electrons with the hydrogen atoms. D There are six shared electrons in a molecule of ammonia.

Which statement about graphite is correct? A It has a low melting point because it has a simple molecular structure. B It has a high melting point because it has a giant ionic structure. C It has a low melting point because it has weak forces of attraction between layers of atoms. D It has a high melting point because it has a giant covalent structure.

The diagram shows a model of an organic molecule. What is the molecular formula of this organic molecule? A ${\mathrm{C}}_2{\mathrm{H}}_8{\mathrm{O}}_4$ B ${\mathrm{C}}_2{\mathrm{H}}_4\mathrm{O}$ C ${\mathrm{C}}_4{\mathrm{H}}_6{\mathrm{O}}_2$ D ${\mathrm{C}}_4{\mathrm{H}}_8{\mathrm{O}}_2$

What is the relative formula mass of ammonium nitrate, ${\mathrm{N}\mathrm{H}}_4{\mathrm{N}\mathrm{O}}_3$? A 80 B 108 C 122 D 150

Substance X is electrolysed. A different gas is produced at each electrode. The gases are collected and tested at room temperature. One of the gases produces a squeaky pop when tested with a lighted splint. The other gas bleaches damp litmus paper. What is substance X? A concentrated aqueous sodium chloride B dilute sulfuric acid C molten lead(II) bromide D molten potassium chloride

An iron pan is electroplated with copper. The apparatus for the electroplating is shown. Which row identifies the metal electrode and the electrolyte?

Four statements about hydrogen fuel cells are listed. 1 Carbon dioxide and water are produced in the fuel cell. 2 In the fuel cell, hydrogen combines with oxygen. 3 The fuel cell converts chemical energy into electrical energy. 4 The hydrogen fuel is extracted from the air. Which statements are correct? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

Four changes are described. 1 When sodium is added to water, thermal energy is released. 2 When water boils, thermal energy is absorbed. 3 When concentrated sulfuric acid is added to water, the temperature of the surroundings increases. 4 When ammonium nitrate is added to water, the temperature of the surroundings decreases. Which changes are endothermic? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

Which process involves a chemical change? A adding sodium to water B boiling water C dissolving sodium chloride in water D producing water from aqueous sodium chloride

Which word equation is correct? A calcium + water $\to$ calcium hydroxide + hydrogen B zinc + hydrochloric acid $\to$ zinc chloride + water C magnesium + oxygen $\to$ magnesium oxide + water D aluminium + sulfuric acid $\to$ aluminium nitrate + hydrogen

Dilute hydrochloric acid reacts with calcium carbonate. $1.0\text{ g}$ of calcium carbonate is added to $50{\text{ cm}}^3$ of dilute hydrochloric acid and the initial rate of reaction is calculated. The experiment is repeated but one change is made. All other conditions are the same. Which row is correct?

Substance X is a blue solid. When X is heated, steam is produced and the solid turns white. What is X? A anhydrous cobalt(II) chloride B anhydrous copper(II) sulfate C hydrated cobalt(II) chloride D hydrated copper(II) sulfate

The equations show two chemical reactions involved in the production of iron from its ore. 1 $\mathrm{C}+{\mathrm{C}\mathrm{O}}_2\to 2\mathrm{C}\mathrm{O}$ 2 ${\mathrm{F}\mathrm{e}}_2{\mathrm{O}}_3+3\mathrm{C}\mathrm{O}\to 2\mathrm{F}\mathrm{e}+3{\mathrm{C}\mathrm{O}}_2$ Which substance is reduced in reaction 1 and in reaction 2?

Which solids neutralise dilute sulfuric acid to form aqueous magnesium sulfate? 1 magnesium carbonate 2 magnesium hydroxide 3 magnesium nitrate 4 magnesium oxide A 1, 2 and 4 B 1 and 3 C 2, 3 and 4 D 2 and 4 only

Which statement about bases is correct? A All bases dissolve in water to form solutions with a pH greater than 7. B Bases react with ammonium salts to form ammonia gas. C All oxides of elements in Period 3 of the Periodic Table are bases. D Bases react with acids to form a salt and hydrogen.

A method used to make copper(II) sulfate crystals is shown. 1 Place dilute sulfuric acid in a beaker. 2 Warm the acid. 3 Add copper(II) oxide until it is in excess. 4 Filter the mixture. 5 Evaporate the filtrate until crystals start to form. 6 Leave the filtrate to cool. What are the purposes of step 3 and step 4?

Which row describes the changes across a period of the Periodic Table, from left to right?

Which statements about elements in Group VIII of the Periodic Table are correct? 1 Atoms of the elements have full outer electron shells. 2 They are diatomic. 3 They are gaseous at room temperature and pressure. 4 They react with water. A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

Caesium is a Group I element. Which statement describes a property of caesium? A It does not conduct electricity. B It has a higher melting point than sodium. C It reacts more vigorously with water than potassium. D It is less dense than lithium.

Aqueous bromine is added to aqueous sodium iodide. bromine + sodium iodide $\to$ ......1...... + ......2...... What are the products of this reaction?

Some properties of element X are listed. 1 It forms coloured compounds. 2 It has a high melting point. 3 It has a high density. Which properties show that X is a transition element? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

Cobalt is a metal. It is more reactive than hydrogen, but less reactive than iron. Which statements are correct? 1 Cobalt reacts with dilute hydrochloric acid. 2 Cobalt reacts rapidly with cold water to form hydrogen gas. 3 Cobalt is more reactive than zinc. 4 Cobalt is more reactive than copper. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Which substances in the air are needed for iron to rust? A oxygen and water B oxygen only C water and carbon dioxide D water only

In a titration, why is distilled water and not tap water used to rinse the burette? A Distilled water contains more bacteria than tap water. B Distilled water contains fewer dissolved ions than tap water. C Distilled water dissolves substances better than tap water. D Distilled water has been filtered and tap water has not.

‘Fastgrow’ is an NPK fertiliser containing elements essential for improved plant growth. Which mixture of substances is used to make ‘Fastgrow’? A ammonium sulfate and potassium nitrate B ammonium nitrate and potassium phosphate C sodium nitrate and ammonium phosphate D sodium phosphate and potassium chloride

Which diagram shows the percentage composition of clean, dry air?

What is the general formula of the alcohol homologous series? A ${\mathrm{C}}_n{\mathrm{H}}_n\mathrm{O}\mathrm{H}$ B ${\mathrm{C}}_n{\mathrm{H}}_{2n-1}\mathrm{O}\mathrm{H}$ C ${\mathrm{C}}_n{\mathrm{H}}_{2n}\mathrm{O}\mathrm{H}$ D ${\mathrm{C}}_n{\mathrm{H}}_{2n+1}\mathrm{O}\mathrm{H}$

Which statement describes ethane? A It is a saturated covalent compound. B It is an unsaturated covalent compound. C It is a saturated ionic compound. D It is an unsaturated ionic compound.

Which structure represents ethene?

What is the name of fraction X? A alcohol B fuel oil C naphtha D paraffin

Four equations involving ethanoic acid are listed. 1 ethanoic acid + calcium $\to$ calcium ethanoate + water 2 ethanoic acid + magnesium oxide $\to$ magnesium ethanoate + water 3 ${\mathrm{C}\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}+\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}\to {\mathrm{C}\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{N}\mathrm{a}+{\mathrm{H}}_2\mathrm{O}$ 4 $2{\mathrm{C}\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}+{\mathrm{N}\mathrm{a}}_2{\mathrm{C}\mathrm{O}}_3\to 2{\mathrm{C}\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{N}\mathrm{a}+{\mathrm{H}}_2\mathrm{O}$ Which equations are correct? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Which piece of apparatus is used to measure exactly $25.00{\text{ cm}}^3$ of dilute hydrochloric acid? A a balance B a beaker C a measuring cylinder D a volumetric pipette

A mixture contains sand and an aqueous solution of sodium chloride. Which processes are used to obtain a sample of solid sand and a sample of solid sodium chloride from the mixture? A crystallisation followed by filtration B evaporation followed by filtration C filtration followed by crystallisation D simple distillation followed by crystallisation

Four coloured substances, P, Q, R and S, are analysed by chromatography. The chromatogram is shown. Which statements are correct? 1 P is less soluble in the solvent than R. 2 R is a pure substance. 3 Q is insoluble in the solvent used. 4 S is a mixture of P and R. A 1, 2 and 3 B 1, 2 and 4 C 2, 3 and 4 D 3 and 4 only