Chemistry 0620/11 October/November 2024: question paper and mark scheme

Question

The table shows the melting and boiling points of four elements. Which element is a gas at room temperature and pressure? melting point / °C boiling point / °C A –101 –35 B –7 59 C 10 100 D 113 445

Question

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

Question

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

Question

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.

Question

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.

Question

Nitrogen monoxide, NO, is a simple molecular compound. Which row shows the properties of nitrogen monoxide? electrical boiling point conductivity A high good B high poor C low good D low poor

Question

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? products with product with oxygen dilute sulfuric acid A XSO4 and H2 XO B XSO4 and H2 XO2 C X2SO4 and H2 XO D X2SO4 and H2 XO2

Question

What is the relative molecular mass, Mr, of sulfuric acid, H2SO4? A 81 B 82 C 97 D 98

Question

The equation for the production of ammonia, NH3, is shown. N2(g) + 3H2(g) → 2NH3(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

Question

The diagram shows the apparatus used to electroplate a nickel shape with silver. power supply silver rod nickel shape electrolyte Which row identifies the negative electrode, the positive electrode and the electrolyte? negative electrode positive electrode electrolyte A silver rod nickel shape aqueous nickel nitrate B nickel shape silver rod aqueous silver nitrate C nickel shape silver rod aqueous nickel nitrate D silver rod nickel shape aqueous silver nitrate

Question

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

Question

Which reaction pathway diagram represents an endothermic reaction? A B reactants products energy energy products reactants progress of reaction progress of reaction C D reactants reactants products energy energy products progress of reaction progress of reaction

Question

The diagram shows a match. By striking the match, a chemical reaction takes place. Which row describes the chemical reaction? type of reaction reason A endothermic because energy is given out as the match burns B endothermic because energy is used to strike the match C exothermic because energy is given out as the match burns D exothermic because energy is used to strike the match

Question

Hydrogen peroxide decomposes to form water and oxygen. The equation is shown. 2H2O2(l) → 2H2O(l) + O2(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

Question

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 cm3 of gas collected in 20 seconds B 50 cm3 of gas collected in 40 seconds C 75 cm3 of gas collected in 80 seconds D 90 cm3 of gas collected in 100 seconds

Question

The equation for the reaction between hydrogen and oxygen is shown. 2H2(g) + O2(g) → 2H2O(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.

Question

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

Question

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? methyl orange thymolphthalein A yellow blue B yellow colourless C red blue D red colourless

Question

Which row describes the solubility of lead(II) chloride and lead(II) sulfate in water? lead(II) chloride lead(II) sulfate A soluble soluble B soluble insoluble C insoluble soluble D insoluble insoluble

Question

Four different groups of oxides are shown. 1 MgO FeO CuO 2 CaO SO2 TiO2 3 PbO CaO Cl 2O 4 NO2 Br2O P2O5 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.

Question

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→2→3→4 B 1→3→4→2 C 3→1→2→4 D 3→4→1→2

Question

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

Question

Rubidium is an element in Group I of the Periodic Table. Which row describes a physical property and a chemical property of rubidium? physical property chemical property A hard reacts with water B hard does not react with water C soft reacts with water D soft does not react with water

Question

Which row describes the state and colour of bromine at room temperature and pressure? state colour A liquid red-brown B liquid grey-black C solid red-brown D solid grey-black

Question

Part of the Periodic Table is shown. Which element is a metal? B C A D

Question

Which compound is made from elements that are all in the same period? A Al 2(SO4)3 B C2H5OH C LiNO3 D Na3Al F6

Question

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? dilute cold water steam hydrochloric acid A key B = reaction C = no reaction D

Question

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.

Question

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

Question

The diagram shows an experiment to investigate how paint affects the rusting of iron. S T iron painted iron air water What happens to the water level in tubes S and T? tube S tube T A falls rises B no change rises C rises falls D rises no change

Question

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.

Question

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

Question

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

Question

Petroleum is an important raw material that is separated into useful products. Which terms describe petroleum and the method used to separate it? description separation method A compound cracking B compound fractional distillation C mixture cracking D mixture fractional distillation

Question

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

Question

The formulae of two organic compounds, P and Q, are shown. P Q CH3CH2CH2OH CH3CH=CHCH3 Which type of organic compounds are P and Q? P Q A alcohol alkane B alcohol alkene C carboxylic acid alkane D carboxylic acid alkene

Question

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

Question

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.

Question

Dyes are coloured substances. The chromatogram of substance X and four different dyes, 1, 2, 3 and 4, is shown. X 1 2 3 4 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

Question

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 The Periodic Table of Elements Group I II III IV V VI VII VIII 1 2 H He hydrogen helium Key 1 4 3 4 atomic number 5 6 7 8 9 10 Li Be atomic symbol B C N O F Ne lithium beryllium name boron carbon nitrogen oxygen fluorine neon 7 9 relative atomic mass 11 12 14 16 19 20 11 12 13 14 15 16 17 18 Na Mg Al Si P S Cl Ar sodium magnesium aluminium silicon phosphorus sulfur chlorine argon 23 24 27 28 31 32 35.5 40 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton 39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon 16 85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131 55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 lanthanoids Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon 133 137 178 181 184 186 190 192 195 197 201 204 207 209 – – – 87 88 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 actinoids Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson – – – – – – – – – – – – – – – – – 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium 139 140 141 144 – 150 152 157 159 163 165 167 169 173 175 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium – 232 231 238 – – – – – – – – – – – The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.).