Cambridge International Examinations Cambridge International General Certificate of Secondary Education

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1 ambridge International Examinations ambridge International General ertificate of Secondary Education HEMISTRY 0620/12 Paper 1 Multiple hoice October/November 2015 * * dditional Materials: RE THESE INSTRUTIONS FIRST Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or H is recommended) 45 Minutes Write in soft pencil. o not use staples, paper clips, glue or correction fluid. Write your name, entre number and candidate number on the nswer Sheet in the spaces provided unless this has been done for you. O NOT WRITE IN NY ROES. There are forty questions on this paper. nswer all questions. For each question there are four possible answers,, and. hoose the one you consider correct and record your choice in soft pencil on the separate nswer Sheet. Read the instructions on the nswer Sheet very carefully. Each correct answer will score one mark. mark will not be deducted for a wrong answer. ny rough working should be done in this booklet. copy of the Periodic Table is printed on page 16. Electronic calculators may be used. The syllabus is approved for use in England, Wales and Northern Ireland as a ambridge International Level 1/Level 2 ertificate. This document consists of 15 printed pages and 1 blank page. I15 11_0620_12/3RP ULES 2015 [Turn over

2 1 Which change of state takes place during evaporation? 2 gas to liquid liquid to gas liquid to solid solid to gas 2 The diagram shows apparatus being used to demonstrate how the rate of a chemical reaction changes with temperature. measuring cylinder reaction mixture tank Which statement must be correct? The reaction is endothermic. The reaction is exothermic. The reaction produces a gas. The reaction produces an acid. ULES /12/O/N/15

3 3 3 The table shows the nucleon number and the number of neutrons in one atom of isotopes W, X, Y and Z. isotope nucleon number number of neutrons W X Y Z Which statement about W, X, Y and Z is correct? W and X are isotopes of the same element. X and Y are isotopes of elements in the same group of the Periodic Table. Y and Z are isotopes of elements in the same period of the Periodic Table. Z has a higher proton number than Y. 4 ompound X melts at 801 and is a good electrical conductor when dissolved in water. ompound Y boils at 77, is insoluble in water and is a non-conductor of electricity. Which type of bonding is present in X and in Y? X Y covalent covalent covalent ionic ionic covalent ionic ionic 5 What do the nuclei of 1 1 H hydrogen atoms contain? electrons and neutrons electrons and protons neutrons only protons only ULES /12/O/N/15 [Turn over

4 6 The electronic structures of atoms X and Y are shown. 4 X Y X and Y form a covalent compound. What is its formula? XY 5 XY 3 XY X 3 Y 7 The relative atomic mass of chlorine is When calculating relative atomic mass, which particle is the mass of a chlorine atom compared to? a neutron a proton an atom of carbon-12 an atom of hydrogen-1 8 The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated aqueous sodium chloride using carbon electrodes. electrode electrode 2 electrode 3 electrode 4 concentrated hydrochloric acid concentrated aqueous sodium chloride t which electrode(s) is hydrogen produced? electrode 1 only electrodes 1 and 3 electrode 2 only electrodes 2 and 4 ULES /12/O/N/15

5 9 The diagram shows a section of an overhead power cable. 5 steel ceramic aluminium Which statement explains why a particular substance is used? luminium has a low density and is a good conductor of electricity. eramic is a good conductor of electricity. Steel can rust in damp air. Steel is more dense than aluminium. 10 Hydrogen can be used as a fuel. Which properties of hydrogen would be advantages and which would be disadvantages? 1 Hydrogen is expensive to produce. 2 Hydrogen reacts exothermically with oxygen. 3 When hydrogen burns, a greenhouse gas is not formed. advantages disadvantages 1 2 and 3 1 and and and Which row correctly describes whether the reaction is exothermic or endothermic? reaction exothermic endothermic calcium carbonate calcium oxide + carbon dioxide carbon + oxygen carbon dioxide methane + oxygen carbon dioxide + water sodium + water sodium hydroxide + hydrogen ULES /12/O/N/15 [Turn over

6 6 12 The diagram shows four experiments in which equal volumes of aqueous acid (all in an excess) are added to equal masses of metal. oth acids have the same concentration. In which experiment has the metal completely reacted in the shortest time? Hl HNO 3 Hl HNO 3 copper granules copper powder zinc granules zinc powder 13 The element vanadium, V, forms several oxides. In which change is oxidation taking place? VO 2 V 2 O 3 V 2 O 5 VO 2 V 2 O 3 VO V 2 O 3 V 2 O 5 14 Which reaction is not a reversible reaction? combustion of alkanes hydration of anhydrous copper(ii) sulfate melting lead(ii) bromide thermal decomposition of hydrated cobalt(ii) chloride 15 The reaction between magnesium and carbon dioxide is represented by the following equation. 2Mg + O 2 2MgO + Which statement describes what happens in this reaction? arbon is oxidised. Magnesium is reduced. Neither oxidation nor reduction happens. The carbon in carbon dioxide is reduced. ULES /12/O/N/15

7 7 16 Which element forms an acidic oxide? 17 Which property is not characteristic of a base? It reacts with a carbonate to form carbon dioxide. It reacts with an acid to form a salt. It reacts with an ammonium salt to form ammonia. It turns universal indicator paper blue. 18 sting from insect X has a ph of 6 and a sting from insect Y has a ph of 8. The table shows the ph of four substances. substance ph hydrochloric acid 1 sodium hydrogen carbonate 8 sodium hydroxide 14 vinegar 5 Which substances are used to treat the two stings? X Y hydrochloric acid sodium hydroxide sodium hydrogen carbonate vinegar sodium hydroxide hydrochloric acid vinegar sodium hydrogen carbonate ULES /12/O/N/15 [Turn over

8 19 salt is produced in each of the following reactions. 8 P Q R S magnesium + dilute hydrochloric acid zinc oxide + dilute sulfuric acid sodium hydroxide + dilute hydrochloric acid copper carbonate + dilute sulfuric acid Which statements about the products of the reactions are correct? 1 flammable gas is produced in reaction P. 2 Water is formed in all reactions. 3 ll the salts formed are soluble in water. 1, 2 and 3 1 and 2 only 1 and 3 only 2 and 3 only 20 The table shows the symbols of three metals with names that begin with the letter. Which row correctly shows the melting point of the metals? o r s high high high high high low low low high low low low 21 The table gives information about four elements. Which element is a transition metal? electrical conductivity density in g / cm 3 melting point in good good poor poor ULES /12/O/N/15

9 22 The diagram shows elements W, X, Y and Z in a section of the Periodic Table. 9 X Y W Z Which statement about the reactivity of the elements is correct? X is more reactive than Y, and W is more reactive than Z. X is more reactive than Y, and Z is more reactive than W. Y is more reactive than X, and W is more reactive than Z. Y is more reactive than X, and Z is more reactive than W. 23 Which two elements make up mild steel? aluminium and magnesium copper and zinc iron and carbon tin and lead 24 The diagrams show what happens when three different metals are added to water. bubbles of gas flame X Y Z What are X, Y and Z? X Y Z calcium copper potassium copper calcium potassium potassium calcium copper potassium copper calcium ULES /12/O/N/15 [Turn over

10 10 25 Which substances do not react together? calcium + water copper + dilute hydrochloric acid sodium + water zinc + dilute hydrochloric acid 26 Iron is extracted from hematite in a blast furnace. Which reaction increases the temperature in the blast furnace to over 1500? calcium carbonate calcium oxide + carbon dioxide calcium oxide + silicon dioxide calcium silicate carbon + oxygen carbon dioxide carbon dioxide + carbon carbon monoxide 27 Which statements about water are correct? 1 Household water may contain salts in solution. 2 Water for household use is filtered to remove soluble impurities. 3 Water is treated with chlorine to kill bacteria. 4 Water is used in industry for cooling. 1, 2, 3 and 4 1, 2 and 3 only 1, 3 and 4 only 2, 3 and 4 only 28 Which gas is a pollutant of the air? argon carbon dioxide nitrogen sulfur dioxide ULES /12/O/N/15

11 29 arbon monoxide is an air pollutant produced when petrol is burned in a car engine. 11 Why is carbon monoxide considered to be an air pollutant? It causes climate change. It causes the corrosion of buildings. It is a significant greenhouse gas. It is poisonous. 30 Metals are welded by using the heat produced by burning a gas in oxygen. Which gas could not be used for this purpose? ethene hydrogen helium methane 31 Which elements are present in NPK fertilisers? nitrogen, phosphorus, potassium nitrogen, potassium, calcium sodium, phosphorus, potassium sodium, potassium, calcium ULES /12/O/N/15 [Turn over

12 12 32 The apparatus shown is set up and left for a week. damp iron wool air water Which diagram shows the level of the water at the end of the week? 33 farmer moves his cows into a concrete shelter for protection. There is little access for fresh air once the door is closed. Which gases would increase in amount in the shelter? carbon dioxide and carbon monoxide carbon dioxide and methane carbon monoxide and oxygen methane and oxygen ULES /12/O/N/15

13 34 student is asked to draw a diagram showing the uses of limestone. 13 making cement making lime 1 2 limestone 3 added, with hematite, to a blast furnace Which numbered lines show a correct use of limestone? 1, 2 and 3 1 and 2 only 1 and 3 only 2 and 3 only 35 Which formula is that of an alkene? 2 H 6 3 H 6 3 H 8 4 H Which row describes the formation of a polymer? monomer polymer ethane poly(ethane) ethane poly(ethene) ethene poly(ethane) ethene poly(ethene) 37 Hydrocarbons obtained by fractional distillation of petroleum can be cracked to make useful products. Which substance could not be obtained by cracking propane, M r 44? 2 H 4 3 H 6 4 H 8 H 2 ULES /12/O/N/15 [Turn over

14 14 38 Ethanol can be formed by 1 fermentation 2 reaction between steam and ethene Which of these processes uses a catalyst? The flow chart shows the preparation of ethanol and some important chemistry of ethanol. substance X fermentation ethanol process Y carbon dioxide + substance Z What are X, Y and Z? X Y Z ethane combustion yeast glucose combustion steam water polymerisation water yeast fermentation glucose 40 What are the properties of a dilute solution of ethanoic acid? smell appearance odourless colourless odourless red pungent smell colourless pungent smell red ULES /12/O/N/15

15 15 LNK PGE ULES /12/O/N/15

16 16 T SHEET The Periodic Table of the Elements Group I II III IV V VI VII H Hydrogen 2 4 He Helium 3 7 Li Lithium 4 9 e eryllium 5 11 oron 6 12 arbon 7 14 N Nitrogen 8 16 O Oxygen 9 19 F Fluorine Ne Neon Na Sodium Mg Magnesium l luminium Si Silicon P Phosphorus S Sulfur l hlorine r rgon K Potassium a alcium Sc Scandium Ti Titanium V Vanadium r hromium Mn Manganese Fe Iron o obalt Ni Nickel u opper Zn Zinc Ga Gallium Ge Germanium s rsenic Se Selenium r romine Kr Krypton Rb Rubidium Sr Strontium Y Yttrium Zr Zirconium Nb Niobium 96 Mo Molybdenum Tc Technetium Ru Ruthenium Rh Rhodium Pd Palladium g Silver d admium In Indium Sn Tin Sb ntimony Te Tellurium I Iodine Xe Xenon s aesium Fr Francium a arium 226 Ra Radium 139 La Lanthanum 57 * c ctinium Hf Hafnium Ta Tantalum W Tungsten Re Rhenium Os Osmium Ir Iridium Pt Platinum u Gold Hg Mercury Tl Thallium Pb Lead i ismuth 84 Po Polonium 85 t statine 86 Rn Radon *58-71 Lanthanoid series ctinoid series Key b a X a = relative atomic mass X = atomic symbol b = proton (atomic) number e erium 232 Th Thorium 141 Pr Praseodymium Pa Protactinium Nd Neodymium 238 U Uranium Pm Promethium Np Neptunium Sm Samarium Pu Plutonium Eu Europium m mericium Gd Gadolinium m urium Tb Terbium k erkelium y ysprosium f alifornium Ho Holmium Es Einsteinium Er Erbium Fm Fermium Tm Thulium Md Mendelevium Yb Ytterbium No Nobelium Lu Lutetium Lr Lawrencium 103 The volume of one mole of any gas is 24 dm 3 at room temperature and pressure (r.t.p.). To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the ambridge International Examinations opyright cknowledgements ooklet. This is produced for each series of examinations and is freely available to download at after the live examination series. ULES /12/O/N/15

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *1773725021* UNIVERSITY OF MRIGE INTERNTIONL EXMINTIONS International General ertificate of Secondary Education EMISTRY 0620/13 Paper 1 Multiple hoice October/November 2012 dditional Materials: Multiple