Chemistry 0620/11 May/June 2022: question paper and mark scheme

Question

Diagrams of the three states of matter for carbon dioxide are shown. 1 2 3 Which two diagrams show the states of matter before and after the sublimation of carbon dioxide? A 2 to 1 B 2 to 3 C 3 to 1 D 3 to 2

Question

A student measures the time taken for 2.0 g of magnesium to dissolve in 50 cm3 of dilute sulfuric acid. Which apparatus is essential to complete the experiment? 1 stop-clock 2 measuring cylinder 3 thermometer 4 balance A 1, 2 and 4 B 1 and 2 only C 1 and 4 only D 2, 3 and 4

Question

Which method is used to separate a mixture of the following liquids? liquid boiling point / °C methanol 64.5 ethanol 78.5 propan-1-ol 97.2 butan-1-ol 117.0 A crystallisation B evaporation C filtration D fractional distillation

Question

Which substance should be pure for the intended use? A a drug for curing disease B limestone for iron extraction C petroleum for fractional distillation D water for washing a car

Question

Which row identifies an alloy, a pure metal and a non-metal? alloy pure metal non-metal A brass carbon copper B brass copper carbon C copper brass carbon D copper carbon brass

Question

Information about the structures of three atoms, X, Y and Z, is shown. proton nucleon atom number number X 1 1 Y 1 2 Z 1 3 Which statements about atoms X, Y and Z are correct? 1 They are isotopes of the same element. 2 They contain the same number of electrons. 3 They contain the same number of neutrons. 4 They contain one occupied electron shell. A 1, 2 and 4 B 1 and 2 only C 3 and 4 D 3 only

Question

What happens to an atom when it becomes an ion with a charge of +1? A It gains an electron. B It gains a proton. C It loses an electron. D It loses a proton.

Question

The relative atomic mass, Ar, of an element is determined by comparing the mass of one atom of the element with the mass of one atom of element Q. What is Q? A carbon B chlorine C hydrogen D oxygen

Question

Which equation for the decomposition of calcium nitrate is correct? A Ca(NO3)2 → CaO + NO2 + O2 B Ca(NO3)2 → CaO + 2NO2 + O2 C 2Ca(NO3)2 → 2CaO + 2NO2 + O2 D 2Ca(NO3)2 → 2CaO + 4NO2 + O2

Question

The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated aqueous sodium chloride using carbon electrodes. + – + – electrode 1 electrode 2 electrode 3 electrode 4 concentrated concentrated aqueous hydrochloric acid sodium chloride At which electrodes is hydrogen produced? A electrode 1 only B electrodes 1 and 3 C electrode 2 only D electrodes 2 and 4

Question

Overhead power cables made from (steel-cored) aluminium are used to carry electricity over long distances. Which property of (steel-cored) aluminium makes it suitable for use in power cables? A Aluminium has a low density. B Aluminium has low strength. C Steel is a good conductor of heat. D Steel is resistant to corrosion.

Question

Which row identifies a chemical change and a physical change? chemical change physical change A boiling ethanol burning ethanol B burning ethanol evaporating ethanol C dissolving ethanol in water burning ethanol D evaporating ethanol dissolving ethanol in water

Question

The equation for the reaction when hydrogen is used as a fuel is shown. 2H2 + O2 → 2H2O Which statement about this reaction is correct? A Energy is given out so the temperature of the surroundings decreases. B Energy is taken in so the temperature of the surroundings increases. C The reaction is endothermic so the temperature of the surroundings decreases. D The reaction is exothermic so the temperature of the surroundings increases.

Question

Which fuels release carbon dioxide when burned? 1 gasoline 2 hydrogen 3 methane A 1 and 2 B 1 and 3 C 2 and 3 D 3 only

Question

Water is added to anhydrous copper(II) sulfate. What happens during the reaction? A The copper(II) sulfate turns blue and the solution formed gets colder. B The copper(II) sulfate turns blue and the solution formed gets hotter. C The copper(II) sulfate turns white and the solution formed gets colder. D The copper(II) sulfate turns white and the solution formed gets hotter.

Question

Excess magnesium ribbon is reacted with a fixed volume of hydrochloric acid and the volume of gas given off over time is measured. The results of two different experiments are shown. reaction 1 volume of gas given off reaction 2 0 0 time Which statement explains the differences between the results of the two experiments? A Reaction 1 uses a catalyst. B The acid used is twice as concentrated in reaction 1. C The magnesium ribbon is in smaller pieces in reaction 2. D The temperature is higher in reaction 2.

Question

Which products are formed when magnesium hydroxide reacts with hydrochloric acid? A magnesium chloride, carbon dioxide and water B magnesium chloride, hydrogen and water C magnesium chloride and hydrogen only D magnesium chloride and water only

Question

The oxides of two elements, X and Y, are separately dissolved in water and the pH of each solution tested. oxide tested pH of solution X 1 Y 13 Which information about X and Y is correct? oxide is oxide is metal non-metal acidic basic A X Y X Y B X Y Y X C Y X X Y D Y X Y X

Question

An acid is neutralised by adding an excess of an insoluble solid base. A soluble salt is formed. How is the pure salt obtained from the reaction mixture? A crystallisation → evaporation → filtration B evaporation → crystallisation → filtration C filtration → crystallisation → evaporation D filtration → evaporation → crystallisation

Question

Three separate samples of an aqueous compound T are tested. The results of the tests are shown. test observation acidify with dilute nitric acid, white precipitate then add aqueous barium nitrate add aqueous ammonia white precipitate, soluble in excess add aqueous sodium hydroxide white precipitate, soluble in excess What is T? A aluminium chloride B aluminium sulfate C zinc chloride D zinc sulfate

Question

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

Question

The elements sodium to argon form Period 3 of the Periodic Table. Which row describes the trend across Period 3 from left to right? number of metallic group outer-shell electrons character number A decreases decreases decreases B decreases increases decreases C increases decreases increases D increases increases increases

Question

Lithium, sodium and potassium are elements in Group I of the Periodic Table. Which statement about these elements is correct? A Lithium has the highest melting point and the lowest density. B Lithium has the highest density and the most violent reaction with water. C Potassium has the highest melting point and the highest density. D Potassium has the lowest melting point and the least violent reaction with water.

Question

Which statement describes a transition element? A It can act as a catalyst and some of its compounds can also act as catalysts. B It forms white compounds with sulfur, oxygen, chlorine and bromine. C It has a low density and a piece of it will float on water. D It is a very poor conductor of electricity.

Question

Which diagram represents the arrangement of the outer-shell electrons of a noble gas? A B C D

Question

Which statements about the general properties of metals are correct? 1 They are good conductors of heat and electricity. 2 They have low melting points. 3 They react with dilute acids to form a salt and water. 4 They react with oxygen to form basic oxides. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Question

Reactions of three metals and their oxides are shown. add dilute heat metal hydrochloric acid metal oxide to metal with carbon 1 key 2 = reacts 3 = does not react What is the order of reactivity of these metals, from most reactive to least reactive? A 1→2→3 B 1→3→2 C 2→1→3 D 2→3→1

Question

Which uses of the metals shown are correct? aluminium stainless steel A aircraft bodies car bodies B car bodies aircraft bodies C chemical plant food containers D food containers cutlery

Question

Which statement about the reactions in the blast furnace is correct? A Carbon reacts with oxygen and heats the furnace. B Carbon monoxide removes the silicon dioxide impurity forming slag. C Iron(III) oxide is oxidised to iron. D Limestone reduces iron(III) oxide to iron.

Question

Iron rusts when exposed to air. Which two substances in air cause iron to rust? A carbon dioxide and oxygen B nitrogen and oxygen C oxygen and water D carbon dioxide and water

Question

Fertilisers are used to provide three of the elements needed for plant growth. Which two compounds would give a fertiliser containing all three of these elements? A Ca(NO3)2 and (NH4)2SO4 B Ca(NO3)2 and (NH4)3PO4 C KNO3 and (NH4)2SO4 D KNO3 and (NH4)3PO4

Question

Which process produces methane? A combustion of hydrocarbons B decomposition of vegetation C respiration D reaction between hydrochloric acid and calcium carbonate

Question

Which statements about sulfur dioxide are correct? 1 Sulfur dioxide decolourises acidified potassium manganate(VII). 2 Sulfur dioxide forms when acids react with carbonates. 3 Sulfur dioxide is used as a bleach. 4 Sulfur dioxide is used to treat acidic soil. A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

Question

What are the products when limestone (calcium carbonate) is heated strongly? A calcium hydroxide and carbon dioxide B calcium hydroxide and carbon monoxide C calcium oxide and carbon dioxide D calcium oxide and carbon monoxide

Question

In which lists are the compounds in the same homologous series? 1 CH4, C2H4, C3H8 2 CH3OH, C2H5OH, C3H7OH 3 CH3CO2H, CH3CH2OH, CH3CH2CH2OH A 1 and 2 B 1 and 3 C 2 only D 3 only

Question

Which row about aqueous ethanoic acid and dilute hydrochloric acid is correct? both contain both contain both react carbon hydrogen with carbonates A key B = yes C = no D

Question

Some properties of colourless liquid L are listed. ● It boils at 65 °C. ● When added to water, two layers form which do not mix. ● It does not react with sodium carbonate. ● It has no effect on bromine water. What is L? A ethanol B hexane C hexene D ethanoic acid

Question

A molecule of compound P contains two carbon atoms and four hydrogen atoms. Which row represents P? name of reacts with Mr compound aqueous bromine A ethane 30 B ethene 16 C ethene 28 D ethene 28

Question

The equation representing the reaction of a hydrocarbon with water is shown. catalyst CxHy + H2O CxH5OH What are the values of x and y? x y A 1 4 B 1 6 C 2 4 D 2 6

Question

Many molecules of J join together in reaction R to form a long chain molecule K. K is the only product. Which row describes molecule J, reaction R and molecule K? molecule J reaction R molecule K A polymer addition monomer B monomer addition polymer C polymer cracking monomer D monomer cracking polymer 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.).