IGCSE Chemistry 0620 Paper 11, Oct/Nov 2024

The table shows the melting and boiling points of four elements. Which element is a gas at room temperature and pressure?

Four statements about the arrangement or movement of particles are given. 1 Particles are packed in a regular arrangement. 2 Particles are randomly arranged. 3 Particles move over each other. 4 Particles vibrate about fixed points. Which statements describe the particles in a pure solid? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

One atom of an element contains 12 electrons, 12 protons and 13 neutrons. How many nucleons does this atom contain? A 12 B 13 C 24 D 25

A diagram representing a mixture of four particles is shown. Which statement describes the mixture of particles? A It is a mixture of two different compounds. B It is a mixture of two different elements. C It is a mixture of four different compounds. D It is a mixture of four different elements.

Chlorine reacts with sodium to form sodium chloride. What happens to the sodium atoms during this reaction? A They gain electrons to form anions. B They lose electrons to form anions. C They gain electrons to form cations. D They lose electrons to form cations.

Nitrogen monoxide, NO, is a simple molecular compound. Which row shows the properties of nitrogen monoxide?

Metal X is in Group II of the Periodic Table. X is reacted separately with dilute sulfuric acid and with oxygen. Which row identifies the products of each reaction?

What is the relative molecular mass, $M_{\text{r}}$, of sulfuric acid, ${\text{H}}_2{\text{SO}}_4$? A 81 B 82 C 97 D 98

The equation for the production of ammonia, ${\text{NH}}_3$, is shown. $${\text{N}}_2(\text{g})+3{\text{H}}_2(\text{g})\to 2{\text{NH}}_3(\text{g})$$ Which mass of nitrogen is required to make 51 tonnes of ammonia? A 21 tonnes B 25.5 tonnes C 42 tonnes D 84 tonnes

The diagram shows the apparatus used to electroplate a nickel shape with silver. Which row identifies the negative electrode, the positive electrode and the electrolyte?

Concentrated aqueous sodium chloride and dilute sulfuric acid are each electrolysed separately using inert electrodes. Three statements about the electrolysis of these electrolytes are listed. 1 A gas is produced at each electrode for both electrolytes. 2 Oxygen is produced at the cathode for both electrolytes. 3 Hydrogen is produced at the cathode for both electrolytes. Which statements are correct? A 1 and 3 B 1 only C 2 only D 3 only

Which reaction pathway diagram represents an endothermic reaction?

The diagram shows a match. By striking the match, a chemical reaction takes place. Which row describes the chemical reaction?

Hydrogen peroxide decomposes to form water and oxygen. The equation is shown. $$2{\text{H}}_2{\text{O}}_2(\text{l})\to 2{\text{H}}_2\text{O}(\text{l})+{\text{O}}_2(\text{g})$$ Manganese(IV) oxide catalyses this reaction. Which statements about manganese(IV) oxide are correct? 1 It increases the rate of the reaction. 2 It increases the total volume of oxygen gas produced at the end of the reaction. 3 It will have the same mass at the end of the reaction as it does at the start of the reaction. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

Four students collect the gas produced from the reaction of calcium carbonate with dilute hydrochloric acid. Each student records the time taken to collect a volume of gas. Which results show the highest average rate of reaction? A $15{\text{ cm}}^3$ of gas collected in 20 seconds B $50{\text{ cm}}^3$ of gas collected in 40 seconds C $75{\text{ cm}}^3$ of gas collected in 80 seconds D $90{\text{ cm}}^3$ of gas collected in 100 seconds

The equation for the reaction between hydrogen and oxygen is shown. $$2{\text{H}}_2(\text{g})+{\text{O}}_2(\text{g})\to 2{\text{H}}_2\text{O}(\text{g})$$ Which statement explains why this is a redox reaction? A Both oxidation and reduction take place. B Heat energy is released to the surroundings. C Hydrogen is a reactant. D The reaction can be reversed.

Which statements about dilute ethanoic acid are correct? 1 It has a pH of 8. 2 It is an organic compound. 3 It turns universal indicator orange-yellow. 4 It reacts with magnesium to produce carbon dioxide. A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

An aqueous solution of Z turns universal indicator paper purple. Which row identifies the colour of methyl orange and of thymolphthalein when they are added separately to an aqueous solution of Z?

Which row describes the solubility of lead(II) chloride and lead(II) sulfate in water?

Four different groups of oxides are shown. 1 $\text{MgO}$ $\text{FeO}$ $\text{CuO}$ 2 $\text{CaO}$ ${\text{SO}}_2$ ${\text{TiO}}_2$ 3 $\text{PbO}$ $\text{CaO}$ ${\text{Cl}}_2\text{O}$ 4 ${\text{NO}}_2$ ${\text{Br}}_2\text{O}$ ${\text{P}}_2{\text{O}}_5$ Which statement about these groups of oxides is correct? A 1, 2 and 3 contain basic oxides only. B 2, 3 and 4 contain basic oxides only. C 1 contains basic oxides only, and 4 contains acidic oxides only. D 1 contains acidic oxides only, and 4 contains basic oxides only.

Four steps in the preparation of a soluble salt from a dilute acid and a solid metal oxide are listed. 1 Warm the dilute acid. 2 Evaporate the solution to half of its volume and allow to cool. 3 Add excess metal oxide. 4 Filter to remove any unreacted solid. What is the correct order for these steps? A $1\to 2\to 3\to 4$ B $1\to 3\to 4\to 2$ C $3\to 1\to 2\to 4$ D $3\to 4\to 1\to 2$

Which pair of elements react together most violently? A chlorine and lithium B chlorine and potassium C iodine and lithium D iodine and potassium

Rubidium is an element in Group I of the Periodic Table. Which row describes a physical property and a chemical property of rubidium?

Which row describes the state and colour of bromine at room temperature and pressure?

Part of the Periodic Table is shown. Which element is a metal?

Which compound is made from elements that are all in the same period? A ${\text{Al}}_2({\text{SO}}_4{)}_3$ B ${\text{C}}_2{\text{H}}_5\text{OH}$ C ${\text{LiNO}}_3$ D ${\text{Na}}_3{\text{AlF}}_6$

Silver metal is separately tested with cold water, with steam and with dilute hydrochloric acid. Which row identifies the tests that show the chemical reactivity of silver?

key: ✓ = reaction ✗ = no reaction

Which statement about the extraction of iron from hematite is correct? A Air is blown into the blast furnace to oxidise the molten iron. B Carbon dioxide is reduced by coke to carbon monoxide. C Hematite is oxidised by carbon to molten iron. D The slag produced is denser than molten iron.

What is an alloy? A a compound of two metallic elements B a compound of metallic and non-metallic elements C a mixture of a metal and at least one other element D a pure metallic element

The diagram shows an experiment to investigate how paint affects the rusting of iron. What happens to the water level in tubes S and T?

Which statement describes clean, dry air? A It is a compound containing about 78% nitrogen and 21% oxygen only. B It is a mixture of about 21% nitrogen and 78% oxygen only. C It is a mixture of several gases, including nitrogen and oxygen. D It is a compound containing nitrogen, oxygen, carbon dioxide and other gases.

Which word equation describes photosynthesis? A carbon dioxide + water $\to$ glucose + oxygen B glucose + water $\to$ carbon dioxide + oxygen C carbon dioxide + oxygen $\to$ glucose + water D glucose + oxygen $\to$ carbon dioxide + water

Some adverse effects caused by air pollutants are listed. ● acid rain ● photochemical smog ● respiratory problems Which air pollutant contributes to all three of these adverse effects? A carbon monoxide B oxides of nitrogen C methane D particulates

Petroleum is an important raw material that is separated into useful products. Which terms describe petroleum and the method used to separate it?

Which statements about homologous series are correct? 1 All carboxylic acids have similar chemical properties. 2 All alcohols have the same molecular mass. 3 Ethane and ethene are members of the same homologous series. 4 Ethane and propane are members of the same homologous series. A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

The formulae of two organic compounds, P and Q, are shown. P: ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{OH}$ Q: ${\text{CH}}_3\text{CH}={\text{CHCH}}_3$ Which type of organic compounds are P and Q?

Which fuel is manufactured by fermentation? A diesel B ethanol C hydrogen D kerosene

Which statement about the disposal of waste plastics is correct? A They are put in landfill sites, where they quickly decompose. B They are burned to produce non-toxic products. C They accumulate in oceans, where they are harmful to aquatic life. D They are dissolved in water and pumped into the sea.

Dyes are coloured substances. The chromatogram of substance X and four different dyes, 1, 2, 3 and 4, is shown. Substance X contains only two of the dyes 1, 2, 3 and 4. Which two dyes are present in substance X? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

The results of two tests on substance G are listed. ● A flame test produces a yellow flame. ● Substance G is added to aqueous sodium hydroxide and powdered aluminium and warmed carefully. A gas is given off which turns damp red litmus paper blue. What is G? A potassium chloride B potassium nitrate C sodium chloride D sodium nitrate