Chemistry 0620/11 May/June 2021: question paper and mark scheme

Question

Which row describes the arrangement and movement of particles in a liquid? arrangement of particles movement of particles A touching and regular vibrating B touching and random moving around each other C touching and regular moving around each other D touching and random moving very fast

Question

A mixture is separated using the apparatus shown. mixture funnel filter paper What is the mixture? A aqueous copper(II) sulfate and aqueous sodium chloride B aqueous copper(II) sulfate and copper C copper and sulfur D ethanol and ethanoic acid

Question

Which statement about paper chromatography is correct? A A solvent is needed to dissolve the paper. B Paper chromatography separates mixtures of solvents. C The solvent should cover the baseline. D The baseline should be drawn in pencil.

Question

Element X has 7 protons. Element Y has 8 more protons than X. Which statement about element Y is correct? A Y has more electron shells than X. B Y has more electrons in its outer shell than X. C Y is in a different group of the Periodic Table from X. D Y is in the same period of the Periodic Table as X.

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A covalent molecule Q contains only six shared electrons. What is Q? A ammonia, NH3 B chlorine, Cl 2 C methane, CH4 D water, H2O

Question

Which row describes how an ionic bond forms between a sodium atom and a chlorine atom? sodium atom chlorine atom A two electrons are lost two electrons are gained B one electron is gained one electron is lost C two electrons are gained two electrons are lost D one electron is lost one electron is gained

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Which diagram shows the structure of an alloy? A B C D

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Methane burns in oxygen to produce carbon dioxide and water. What is the balanced equation for this reaction? A CH4 + 2O2 → 2CO2 + 2H2O B CH4 + 2O2 → CO2 + 2H2O C CH4 + 2O2 → CO2 + H2O D CH4 + O2 → CO2 + 2H2O

Question

What is the relative formula mass of magnesium nitrate, Mg(NO3)2? A 74 B 86 C 134 D 148

Question

In separate experiments, electricity was passed through concentrated aqueous sodium chloride and molten lead(II) bromide. What would happen in both experiments? A A halogen would be formed at the anode. B A metal would be formed at the cathode. C Hydrogen would be formed at the anode. D Hydrogen would be formed at the cathode.

Question

Steel core aluminium cables are used for overhead electricity cables. Which statement explains why these cables are used? A Aluminium conducts electricity only when it surrounds a steel core. B Aluminium conducts electricity and the steel core makes the cable stronger. C Steel conducts electricity and is surrounded by aluminium because aluminium is an insulator. D Steel conducts electricity and is surrounded by aluminium to stop the steel from corroding.

Question

The complete combustion of propane is exothermic. The equation for this reaction is shown. C3H8 + 5O2 → 3CO2 + 4H2O Which energy level diagram represents the complete combustion of propane? A B C3H8 + 5O2 3CO2 + 4H2O energy energy 3CO2 + 4H2O C3H8 + 5O2 progress of reaction progress of reaction C D 3CO2 + 4H2O C3H8 + 5O2 energy energy C3H8 + 5O2 3CO2 + 4H2O progress of reaction progress of reaction

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Which changes occur when hydrogen is burned in oxygen? energy change product A endothermic H2O only B endothermic H2O and CO2 C exothermic H2O only D exothermic H2O and CO2

Question

When sulfur is heated it undergoes a ……1…… change as it melts. Further heating causes the sulfur to undergo a ……2…… change and form sulfur dioxide. Which words complete gaps 1 and 2? 1 2 A chemical chemical B chemical physical C physical chemical D physical physical

Question

Zinc reacts with an acid to form a gas. The volume of gas produced is measured at intervals. The results are shown as curve Z. The reaction is repeated in the presence of a catalyst. Which curve shows the results for the catalysed reaction? A B volume of gas formed Z C D time

Question

Which statement is correct? A When anhydrous copper(II) sulfate is heated its colour changes to a deeper blue. B When hydrated copper(II) sulfate is heated its colour changes to a deeper blue. C When water is added to blue cobalt(II) chloride paper it turns pink. D When water is added to pink cobalt(II) chloride paper it turns blue.

Question

Three separate experiments are carried out on an aqueous solution of S. The results are shown. 1 Magnesium does not react with the solution. 2 A gas is given off when ammonium sulfate is heated with the solution. 3 Methyl orange turns yellow when added to the solution. What is S? A hydrochloric acid B sodium hydroxide C sodium chloride D sulfur dioxide

Question

Element X forms an oxide, XO, that neutralises sulfuric acid. Which row describes X and XO? element X nature of oxide, XO A metal acidic B metal basic C non-metal acidic D non-metal basic

Question

Copper(II) sulfate is prepared by adding excess copper(II) oxide to warm dilute sulfuric acid. Which purification methods are used to obtain pure solid copper(II) sulfate from the reaction mixture? 1 crystallisation 2 filtration 3 chromatography 4 distillation A 1 and 4 B 1 and 2 C 2 and 3 D 3 and 4

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Some reactions of element M are shown. burn add water element M oxide of M solution add to purple acidified add blue litmus potassium manganate(VII) goes colourless goes red What is element M? A carbon B iron C magnesium D sulfur

Question

Element X is in Group II of the Periodic Table. Which statements about X are correct? 1 X is a metal. 2 X has two electrons in its outer shell. 3 X is a liquid at room temperature. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

Question

Why is helium used to fill balloons? A Helium is monoatomic. B Helium is in Group VIII of the Periodic Table. C Helium has a full outer electron shell. D Helium is less dense than air.

Question

Which row describes the trend in properties of the elements in Group I as the group is descended? melting reactivity point with water A decreases decreases B decreases increases C increases decreases D increases increases

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An element melts at 1455 °C, has a density of 8.90 g / cm3 and forms a green chloride. Where in the Periodic Table is this element found? A B C D

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Some properties of metal J are listed. ● J does not react with cold water. ● J reacts with dilute hydrochloric acid. ● No reaction occurs when the oxide of J is heated with carbon. What is J? A copper B iron C magnesium D sodium

Question

Iron from a blast furnace is treated with oxygen and with calcium oxide to make steel. Which substances in the iron are removed? oxygen calcium oxide removes removes A carbon acidic oxides B carbon basic oxides C iron acidic oxides D iron basic oxides

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Which row describes a use of the metal and explains why it is used? metal use reason A aluminium food containers good conductor of electricity B aluminium aircraft wings high density C copper cooking utensils good conductor of heat D copper electricity cables good electrical insulator

Question

Ammonium chloride is heated with aqueous sodium hydroxide. damp universal indicator paper ammonium chloride and aqueous sodium hydroxide gentle heat A gas is produced which turns damp universal indicator paper blue. Which gas has been produced? A ammonia B hydrogen C oxygen D sulfur dioxide

Question

Which two gases make up approximately 99% of clean, dry air? A carbon dioxide and nitrogen B carbon dioxide and oxygen C nitrogen and oxygen D argon and nitrogen

Question

A student writes three statements about potassium nitrate, KNO3. 1 The relative formula mass of KNO3 is 101. 2 Potassium nitrate contains the three essential elements for plant growth. 3 Potassium nitrate could be used as a fertiliser. Which statements are correct? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

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Which row describes the uses of sulfur and sulfur dioxide? sulfur sulfur dioxide A extraction of aluminium food preservative B extraction of aluminium manufacture of cement C manufacture of sulfuric acid food preservative D manufacture of sulfuric acid manufacture of cement

Question

A white solid Z reacts with dilute hydrochloric acid to produce a gas. The same gas is produced when compound Z is heated strongly. What is Z? A calcium B calcium carbonate C calcium hydroxide D calcium oxide

Question

Some information about compound L is listed. 1 L is an organic compound which contains four hydrogen atoms. 2 L is soluble in water. 3 An aqueous solution of L reacts with copper(II) carbonate to produce a gas. What is L? A methane B ethene C ethanoic acid D ethanol

Question

The structure of an organic molecule is shown. H H H H O H O C C C C C O H H H Which functional groups does this molecule contain? carboxylic alcohol alkene acid A no no no B no yes yes C yes no yes D yes yes yes

Question

Which compounds belong to the same homologous series? A ethane and propane B ethanoic acid and ethanol C methane and ethene D propene and ethanoic acid

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Which statement about alkanes is correct? A They burn in oxygen. B They contain carbon, hydrogen and oxygen atoms. C They contain double bonds. D They contain ionic bonds.

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Which structure represents poly(ethene)? A B C D H H H H H H H H C C n C C C C C C H H H H H H n H H n

Question

P, Q, R and S are four organic compounds. P is an unsaturated hydrocarbon. Q burns but otherwise is unreactive. R contains a C–C single bond and a C=C double bond. S undergoes addition polymerisation. Which compounds are alkenes? A P and R only B P, R and S C P, Q and S D Q, R and S

Question

Which statement about petroleum fractions is correct? A All petroleum fractions are used as fuels. B Gas oil is used to make bottled gas for heating. C Hydrocarbons in diesel have higher boiling points than hydrocarbons in gasoline. D Molecules in kerosene are larger than molecules in fuel oil.

Question

Which substance is a natural polymer? A ethene B Terylene C nylon D protein 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.).