Chemistry 0620/13 October/November 2022: question paper and mark scheme

Question

Which row describes the separation and motion of particles in a gas? separation motion of particles of particles A close together slow movement B close together fast movement C widely spaced slow movement D widely spaced fast movement

Question

Which burette shows a reading of 12.1 cm3? A B C D 11 11 11 11 12 12 12 12 13 13 13 13

Question

A solution of sodium chloride is mixed with a solution of silver nitrate. A white precipitate of silver chloride and a colourless solution of sodium nitrate are formed. Which method is used to separate the silver chloride from the mixture? A crystallisation B distillation C filtration D use of a solvent

Question

Which two particles have the same electronic structure? A C and O2– B F – and Na C K+ and S2– D Mg and Na+

Question

Which statement about an alloy is correct? A It is a compound made of two or more elements, one of which is a metal. B It is a layer of a metal plated onto another metal. C It is a mixture of a metal with one or more other elements. D It is a single element.

Question

Magnesium reacts with oxygen to form magnesium oxide. In the reaction, each magnesium atom ……1…… two ……2…… . Which words complete gaps 1 and 2? 1 2 A loses electrons B loses protons C gains electrons D gains protons

Question

Which row about the structures and uses of diamond and graphite is correct? structure use A diamond has a giant covalent structure diamond is used to make electrodes B diamond has a simple covalent structure diamond is used to make cutting tools C graphite has a giant covalent structure graphite is used as a lubricant D graphite has a simple covalent structure graphite is used to make cutting tools

Question

Caffeine is a stimulant found in coffee. O CH3 H 3C C N N C C H C C N O N CH3 caffeine Which formula represents caffeine? A C7H10N4O2 B C8H10N3O2 C C8H10N4O2 D C8H11N4O2

Question

Iron reacts with sulfuric acid to form iron(II) sulfate. What is the equation for this reaction? A Fe + H2SO4 → FeSO4 + 2H B Fe + H2SO4 → FeSO4 + H2 C Fe + 2H2SO4 → FeSO4 + 2H2O + SO2 D 2Fe + H2SO4 → Fe2SO4 + H2

Question

Which apparatus is used to plate a nickel object with silver? A B power power supply supply silver + – nickel nickel + – silver object object silver nitrate silver nitrate solution solution C D power power supply supply silver + – nickel nickel + – silver object object nickel nitrate nickel nitrate solution solution

Question

When an acid is added to an alkali, the temperature of the reaction mixture rises. Which words describe this reaction? A decomposition and endothermic B decomposition and exothermic C neutralisation and endothermic D neutralisation and exothermic

Question

Some properties of four fuels are shown. Which fuel is a gas at room temperature and makes two products when it burns in a plentiful supply of air? melting point boiling point fuel formula / °C / °C A hydrogen H2 –259 –253 B methane CH4 –182 –164 C octane C8H18 –57 126 D wax C31H64 60 400

Question

Which process is a physical change? A burning wood B cooking an egg C melting an ice cube D rusting iron

Question

Dilute hydrochloric acid is reacted with excess calcium carbonate and the total volume of gas is measured at regular intervals. The results are shown by line W on the graph. The experiment is repeated but with one change. The results of the second experiment are shown by line X on the graph. W volume of X gas collected 0 0 time Which change is made in the second experiment? A A catalyst is added. B The calcium carbonate is broken into smaller pieces. C The concentration of the dilute hydrochloric acid is increased. D The temperature of the dilute hydrochloric acid is decreased.

Question

When hydrated copper(II) sulfate is heated, it produces white copper(II) sulfate. When water is added, the white copper(II) sulfate turns blue. Which type of reaction is shown by these observations? A decomposition B displacement C redox D reversible

Question

When magnesium is heated with zinc oxide a reaction occurs. The equation is shown. Mg + ZnO → MgO + Zn Which substance is oxidised? A magnesium B magnesium oxide C zinc D zinc oxide

Question

Which row about sodium oxide and sulfur dioxide is correct? sodium oxide sulfur dioxide A acidic acidic B acidic basic C basic acidic D basic basic

Question

Copper(II) sulfate is a soluble compound that is made by reacting copper(II) oxide with dilute sulfuric acid. This can be completed in the following steps. 1 Add excess copper(II) oxide to dilute sulfuric acid and heat the mixture. 2 Filter off any unreacted copper(II) oxide. 3 Heat to remove most of the water from the filtrate. 4 Leave the solution to cool and filter off the solid copper(II) sulfate which forms. Which row shows the processes used in this preparation? crystallisation distillation evaporation A B C D

Question

Tests are done on an aqueous solution. a few drops of aqueous aqueous sodium hydroxide test sodium hydroxide are added is added in excess precipitate dissolves to observation white precipitate give a colourless solution Which cations produce these observations? 1 aluminium, Al 3+ 2 calcium, Ca2+ 3 zinc, Zn2+ A 1 and 2 B 1 and 3 C 1 only D 2 and 3

Question

Which statement about the Periodic Table is correct? A Elements in the same group have the same number of electron shells. B Elements are arranged in order of increasing proton number. C Metals are on the right and non-metals are on the left. D The most reactive elements are at the bottom of every group.

Question

Elements E and F are in Group I of the Periodic Table. E has a higher melting point than F. Elements J and L are in Group VII of the Periodic Table. J has a higher density than L. Which elements have the highest atomic numbers in each group? A E and J B E and L C F and J D F and L

Question

What is a characteristic property of a transition element? A acts as a catalyst B low density C low melting point D non-conductor of electricity

Question

Gas G has 10 electrons. Gas H has eight more electrons than gas G. Both gases are monoatomic. Which statement about G and H is correct? A Both gases are in the same group of the Periodic Table. B Both gases are in the same period of the Periodic Table. C Both gases are very reactive. D Gas G has a higher atomic mass than gas H.

Question

Which statements about the metals zinc, magnesium, iron and sodium are correct? 1 They all conduct electricity. 2 They all have high melting points and boiling points. 3 They all form negative ions. 4 They all react with dilute acids to form hydrogen. A 1 and 3 B 1 and 4 C 2 and 3 D 3 and 4

Question

Which statement about the reactions of metals is correct? A Iron and carbon dioxide are produced when iron(III) oxide is heated with carbon. B Magnesium reacts with dilute hydrochloric acid producing hydrogen and chlorine. C Potassium reacts vigorously with water producing hydrogen and an acidic solution. D Zinc reacts with dilute sulfuric acid producing sulfur dioxide.

Question

Which metal is obtained by heating its oxide with carbon? A aluminium B calcium C magnesium D zinc

Question

Which row links the property of the stated metal with its use? metal property use A aluminium does not corrode food containers B copper high strength chemical plant C mild steel good conductor of electricity electrical wiring D stainless steel low density aircraft

Question

The diagram shows a stage in the purification of dirty water. dirty water sand pot with holes fine gravel in bottom coarse gravel Which process does this apparatus show? A chlorination B condensation C distillation D filtration

Question

Which substance in polluted air damages stonework and kills trees? A carbon dioxide B carbon monoxide C lead compounds D sulfur dioxide

Question

A farmer has four different compounds that are used in fertilisers. name of compound formula of compound 1 potassium nitrate KNO3 2 ammonium phosphate (NH4)3PO4 3 ammonium nitrate NH4NO3 4 urea (NH2)2CO Which two compounds are mixed to make an NPK fertiliser? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Question

Waste vegetables are placed in a sealed container with air and left for a number of days. Bacteria cause the vegetables to decompose. During the decomposition the bacteria respire. What happens to the concentration of carbon dioxide and methane in the air in the container? concentration of concentration of carbon dioxide methane A decreases decreases B does not change increases C increases does not change D increases increases

Question

Which element has an oxide that is used as a food preservative? A helium B hydrogen C iron D sulfur

Question

Which substance gives off carbon dioxide on heating? A lime B limestone C limewater D slaked lime

Question

Which rows show the correct name for the structure shown? structure name H H 1 H C C H ethene H H H 2 H C H methane H H O 3 H C C ethanol H O H H H 4 H C C O H ethanoic acid H H A 1 and 2 B 2, 3 and 4 C 2 only D 3 and 4 only

Question

Fuel oil and naphtha are two fractions obtained from petroleum. What are the major uses of these fractions? fuel oil naphtha A jet fuel making chemicals B jet fuel making roads C ship fuel making chemicals D ship fuel making roads

Question

Which statement explains why members of the same homologous series have similar chemical properties? A There are covalent bonds in all the molecules. B There are only carbon and hydrogen atoms in all the molecules. C There is the same number of carbon atoms in all the molecules. D There is the same functional group in all the molecules.

Question

Which molecules are unsaturated hydrocarbons? 1 2 3 4 H H H H H H H H H C C C H C C H C C H C C H H H H H H H H n A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Question

The results of tests carried out on an organic compound are shown. test result appearance colourless liquid effect of adding aqueous bromine no reaction effect of applying a lighted splint burns effect of adding litmus turns red What is the organic compound? A ethane B ethanoic acid C ethanol D ethene

Question

Which word equation represents a reaction that occurs with ethanoic acid? A ethanoic acid + calcium carbonate → salt + carbon dioxide B ethanoic acid + copper → salt + hydrogen C ethanoic acid + magnesium → salt + hydrogen D ethanoic acid + sodium hydroxide → salt + oxygen

Question

Four substances are listed. 1 carbohydrate 2 ethanol 3 protein 4 sodium chloride Which substances are natural polymers? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4 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 85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131 16 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 89–103 104 105 106 107 108 109 110 111 112 114 116 actinoids Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Fl Lv francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium flerovium livermorium – – – – – – – – – – – – – 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.).