Chemistry 0620/11 May/June 2020: question paper and mark scheme

Question

Nitrogen is heated in a balloon, which expands slightly. Which statements about the molecules of nitrogen are correct? 1 They move further apart. 2 They move more quickly. 3 They remain the same distance apart. 4 Their speed remains unchanged. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Question

Which piece of apparatus should be used to measure exactly 21.4 cm3 of water? A 25 cm3 beaker B 25 cm3 pipette C 50 cm3 burette D 50 cm3 measuring cylinder

Question

Which method of separation is used to separate a soluble solid from its solution? A chromatography B condensation C crystallisation D filtration

Question

The atomic number and nucleon number of a potassium atom are shown. potassium atom atomic number 19 nucleon number 39 How many protons, neutrons and electrons are in a potassium ion, K+? protons neutrons electrons A 19 20 18 B 19 20 20 C 20 19 18 D 20 19 19

Question

Sodium is in Group I of the Periodic Table. Chlorine is in Group VII of the Periodic Table. Sodium and chlorine combine to form a compound. Which statement about the combination of sodium and chlorine atoms is correct? A Both sodium and chlorine lose electrons. B Both sodium and chlorine gain electrons. C Sodium loses electrons and chlorine gains electrons. D Sodium gains electrons and chlorine loses electrons.

Question

The electronic structures of two atoms, P and Q, are shown. P Q P and Q combine together to form a compound. What is the type of bonding in the compound and what is the formula of the compound? type of bonding formula A ionic PQ B ionic PQ2 C covalent PQ2 D covalent PQ

Question

The structures of diamond and graphite are shown. Which statement about diamond and graphite is correct? A Diamond and graphite have low melting points. B Diamond and graphite have mobile electrons. C Diamond and graphite have layered structures. D Diamond and graphite contain strong covalent bonds between carbon atoms.

Question

Aluminium oxide has the formula Al 2O3. Which statement about aluminium oxide is correct? A 2 g of aluminium atoms are combined with 3 g of oxygen atoms. B 2 g of aluminium atoms are combined with 3 g of oxygen molecules. C Aluminium oxide has a relative formula mass of 102. D Pure aluminium oxide contains a higher mass of oxygen than of aluminium.

Question

Which products are formed when dilute sulfuric acid undergoes electrolysis? at the anode at the cathode A oxygen hydrogen B hydrogen oxygen C sulfur dioxide hydrogen D oxygen sulfur dioxide

Question

Which element is not used as a fuel? A carbon B helium C hydrogen D uranium

Question

The energy level diagram shows the energy of the reactants and products in a chemical reaction. reactants energy products progress of reaction Which row correctly describes the energy change and the type of reaction shown? description of type of reaction energy change A energy is given out endothermic to the surroundings B energy is given out exothermic to the surroundings C energy is taken in from endothermic the surroundings D energy is taken in from exothermic the surroundings

Question

Which diagram represents a chemical change? A B C D

Question

The rate of reaction between magnesium and hydrochloric acid is investigated. The volume of hydrogen given off at different times is measured. The results are shown. 25 20 volume of 15 hydrogen / cm3 10 5 0 0 10 20 30 40 50 60 70 80 90 100 time / s Which conclusions are correct? 1 The rate is fastest between 0 and 20 seconds. 2 The maximum volume of hydrogen given off is 22 cm3. 3 At 40 seconds, 20 cm3 of hydrogen is given off. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

Question

Which reaction can be easily reversed? A dissolving zinc in hydrochloric acid B fermenting glucose with yeast C heating hydrated cobalt(II) chloride D the rusting of an iron nail

Question

Carbon reacts with silver oxide to form carbon dioxide and silver. Which substance is reduced? A carbon B carbon dioxide C silver D silver oxide

Question

The graph shows how the pH of a solution changes as an acid is added to an alkali. acid + alkali → salt + water Which letter represents the area of the graph where both acid and salt are present? A 14 B C pH 7 D 0 volume of acid added

Question

Phosphorus is an element in Group V of the Periodic Table. It burns in air to form an oxide, which dissolves in water to form a solution with a pH of 1. Which row describes this oxide of phosphorus? metal non-metal acidic basic oxide oxide oxide oxide A B C D

Question

The apparatus shown is used to prepare aqueous copper(II) sulfate. filter paper stirrer excess of solid X solid X Y aqueous copper(II) sulfate heat What are X and Y? X Y A copper aqueous iron(II) sulfate B copper(II) chloride dilute sulfuric acid C copper(II) oxide dilute sulfuric acid D sulfur aqueous copper(II) chloride

Question

Two tests are carried out on substance Z. test 1 A flame test produces a red flame. test 2 Z is dissolved in water and dilute nitric acid is added, followed by aqueous silver nitrate. A yellow precipitate is produced. What is substance Z? A lithium bromide B lithium iodide C sodium bromide D sodium iodide

Question

The elements in Period 3 of the Periodic Table are shown. Na Mg Al Si P S Cl Ar Which statements about the elements in Period 3 are correct? 1 Na, Mg and Al are metals. 2 S, Cl and Ar are non-metals. 3 Si, P and S are metals. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

Question

A Group I metal (lithium, sodium or potassium) is reacted with a Group VII element (chlorine, bromine or iodine). Which compound is formed when the Group I metal of highest density reacts with the Group VII element of lowest density? A lithium chloride B potassium chloride C potassium iodide D lithium iodide

Question

The properties of the element titanium, Ti, can be predicted from its position in the Periodic Table. Which row identifies the properties of titanium? can be used conducts electricity forms coloured has low density as a catalyst when solid compounds A B C D

Question

A balloon is filled with helium. Helium is a noble gas and makes the balloon rise up in the air. The density of air is 1.23 g / dm3. Which gas is helium? density in g / dm3 reaction with oxygen A 0.0899 burns rapidly B 0.179 does not react with oxygen C 1.78 does not react with oxygen D 3.75 does not react with oxygen

Question

Which property is shown by all metals? A They are extracted from their ores by heating with carbon. B They conduct electricity. C They form acidic oxides. D They react with hydrochloric acid to form hydrogen.

Question

The properties of four metals, W, X, Y and Z, are shown. W It does not react with cold water but reacts with steam. X It does not react with water or dilute acid but the oxide of X is reduced by carbon. Y The oxide of Y is not reduced by carbon but Y reacts vigorously with cold water. Z It does not react with water or steam but reacts with dilute acid. What is the order of reactivity of the elements starting with the most reactive? most least reactive reactive A X W Z Y B X Z W Y C Y W Z X D Y Z W X

Question

Molten iron from the blast furnace contains impurities. The process of turning the impure iron into steel involves blowing oxygen into the molten iron and adding calcium oxide. What are the reasons for blowing in oxygen and adding calcium oxide? blowing in oxygen adding calcium oxide A carbon is removed by reacting with oxygen reacts with acidic impurities making slag B carbon is removed by reacting with oxygen reacts with slag and so removes it C iron reacts with the oxygen reacts with acidic impurities making slag D iron reacts with the oxygen reacts with slag and so removes it

Question

Which row describes two uses of the named steel? type of steel uses A mild steel cutlery and car bodies B mild steel car bodies and chemical plant C stainless steel cutlery and chemical plant D stainless steel car bodies and cutlery

Question

Which statement shows that a liquid is pure water? A It boils at 100 °C. B It has a pH value of 7. C It turns blue cobalt(II) chloride pink. D It turns white copper(II) sulfate blue.

Question

Some gases are present in clean air while other gases are only present in polluted air. Which row is correct? a gas present a gas only present in clean air in polluted air A argon carbon dioxide B argon nitrogen dioxide C sulfur dioxide carbon dioxide D sulfur dioxide nitrogen dioxide

Question

The diagrams show experiments to investigate rusting of iron nails. 1 2 3 layer of oil tap salt boiled water water water In which test-tubes do the nails rust? A 1 only B 1 and 2 only C 1 and 3 only D 1, 2 and 3

Question

Which mixture contains all of the elements in a typical fertiliser? A ammonium nitrate and calcium phosphate B ammonium phosphate and potassium chloride C potassium nitrate and ammonium chloride D potassium carbonate and ammonium nitrate

Question

Which processes produce methane? 1 complete combustion of carbon-containing compounds 2 decomposition of vegetation 3 digestion in animals 4 respiration in animals A 1 and 4 B 1 and 3 C 2 and 3 D 2 and 4

Question

The list shows four methods that were suggested for the formation of carbon dioxide. 1 cracking methane using steam 2 action of heat on a carbonate 3 complete combustion of methane 4 reaction of a carbonate with oxygen Which methods would result in the production of carbon dioxide? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Question

A student suggests three uses of calcium carbonate (limestone). 1 manufacture of cement 2 manufacture of iron 3 treating alkaline soils Which suggestions are correct? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

Question

Which list shows the fractions obtained from distilling petroleum, in order of increasing boiling point? A bitumen → diesel oil → fuel oil → lubricating oil B diesel oil → gasoline → naphtha → kerosene C gasoline → naphtha → kerosene → diesel oil D kerosene → lubricating oil → naphtha → refinery gas

Question

Which statement about members of a homologous series is correct? A They are elements with the same chemical properties. B They are compounds with the same functional group. C They are atoms with the same number of outer electrons. D They are molecules with the same boiling point.

Question

Increasing the number of atoms in one molecule of a hydrocarbon increases the amount of energy released when it burns. What is the correct order? less energy more energy released released A ethene ethane methane B ethene methane ethane C methane ethane ethene D methane ethene ethane

Question

Which statements about ethanol are correct? 1 Ethanol is made by reacting steam with ethene at 300 °C. 2 Ethanol is made by fermentation at 55 °C. 3 Ethanol burns to produce carbon dioxide and water. 4 Ethanol contains a carbon-carbon double bond. A 1 and 2 B 1 and 3 C 2 and 3 D 3 and 4

Question

Some properties of an organic compound J are listed. ● It is a liquid at room temperature. ● It is soluble in water. ● A solution of J reacts with calcium carbonate to form carbon dioxide. ● A solution of J has a pH of 3. In which homologous series does J belong? A alkane B alkene C alcohol D carboxylic acid

Question

Which polymers or types of polymer are synthetic? 1 carbohydrates 2 nylon 3 proteins 4 Terylene A 1 and 3 B 1 and 4 C 2 and 3 D 2 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.).