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 EMISTRY 0620/12 Paper 1 Multiple hoice (ore) February/March 2016 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or is recommended) 45 Minutes RE TESE INSTRUTIONS FIRST 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 Level1/Level 2 ertificate. This document consists of 14 printed pages and 2 blank pages. I16 03_0620_12/3RP ULES arch [Turn over

2 2 1 Two gas jars are set up as shown. air jar 1 jar 1 lid brown gas jar 2 jar 2 before after The lid is removed and the gas jars are left to stand. fter some time the contents of both gas jars are brown. Which process causes this to happen? condensation diffusion evaporation filtration 2 Which piece of apparatus is used to measure variable quantities of liquid in a titration? 3 Which method separates a mixture of sugar and glass? dissolve, filter and evaporate distil and filter fractionally distil use chromatography ULES /12/F/M/16

3 3 4 In which row are the substances correctly classified? element compound mixture brass sulfur water sulfur brass water sulfur water brass water sulfur brass 5 Element Q has 4 electrons in its outer shell and has 69 neutrons. Q conducts electricity. What is Q? carbon () lead (Pb) thulium (Tm) tin (Sn) 6 Which statement describes positive ions? Positive ions have more electrons than neutrons. Positive ions have more protons than neutrons. Positive ions have more electrons than protons. Positive ions have more protons than electrons. 7 The electronic structures of atoms X and Y are shown. X Y X and Y form a covalent compound. What is its formula? X 2 Y XY XY 2 XY 6 8 The compound magnesium nitrate has the formula Mg(NO 3 ) 2. What is the relative formula mass of magnesium nitrate? ULES /12/F/M/16 [Turn over

4 4 9 The diagram shows, in cross-section, the arrangement of aluminium and steel wires in an electric power cable. key = aluminium = steel Which metal wire is the better conductor and which metal wire has the greater mechanical strength? better conductor greater mechanical strength aluminium aluminium aluminium steel steel aluminium steel steel 10 When concentrated hydrochloric acid is electrolysed, gases P and Q are formed. P Q concentrated hydrochloric acid platinum electrodes + What are P and Q? P Q chlorine hydrogen chlorine oxygen hydrogen chlorine hydrogen oxygen ULES /12/F/M/16

5 11 Which substance could not be used as a fuel to heat water in a boiler? 5 ethanol hydrogen methane oxygen 12 Which statement about reactions that produce heat is not correct? urning magnesium produces heat energy. The overall reaction is exothermic. The products have more energy than the reactants. The temperature of the surroundings increases. 13 Which changes increase the rate of reaction? 1 increasing the concentration of the reactants 2 increasing the particle size of a solid reactant 3 increasing the temperature 1, 2 and 3 1 and 2 only 1 and 3 only 2 and 3 only 14 Two reactions involving water are shown. X Y anhydrous cobalt(ii) chloride + water hydrated cobalt(ii) chloride iron + oxygen + water rust Which reactions are reversible by heating? X Y ULES /12/F/M/16 [Turn over

6 6 15 Iron is extracted from iron oxide using carbon monoxide as shown. iron oxide + carbon monoxide iron + carbon dioxide Which statement is correct? arbon monoxide is oxidised to carbon dioxide. arbon monoxide is reduced to carbon dioxide. Iron is oxidised to iron oxide. Iron oxide is oxidised to iron. 16 Four different solutions, W, X, Y and Z, are tested with Universal Indicator. solution W X Y Z colour with Universal Indicator green red purple orange Which solutions are acidic? W and Z X and Z X only Y only 17 Methyl orange turns red in the solution formed when substance R reacts with water. What is R? calcium oxide potassium oxide sodium oxide sulfur dioxide 18 salt is made by adding an excess of an insoluble metal oxide to an acid. ow is the excess metal oxide removed from the mixture? chromatography crystallisation distillation filtration ULES /12/F/M/16

7 7 19 substance is heated with aluminium foil in aqueous sodium hydroxide. gas is produced which turns damp, red litmus paper blue. Which anion is present in the substance? carbonate iodide nitrate sulfate 20 n element does not conduct electricity and exists as diatomic molecules. Where in the Periodic Table is the element found? 21 In the Periodic Table, how does the metallic character of the elements vary from left to right across a period? It decreases. It increases. It increases then decreases. It stays the same. 22 The elements in a group of the Periodic Table show the following trends. 1 The element with the lowest proton number has the lowest reactivity. 2 ll the elements in the group form basic oxides. 3 The density of the elements increases down the group. 4 The melting point of the elements decreases down the group. In which group are the elements found? I IV VI VII ULES /12/F/M/16 [Turn over

8 8 23 Which element is a transition metal? melting point in density in g / cm 3 colour of oxide white yellow white black 24 Uranium is a radioactive element but it is also a typical metal. What is not a property of uranium? It can be hammered into shape. It conducts heat. It is used as a source of energy. It forms covalent compounds. 25 Which metal reacts with steam but not with cold water? calcium copper sodium zinc 26 Iron is extracted from hematite in the blast furnace. The hematite contains silicon(iv) oxide (sand) as an impurity. What reacts with this impurity to remove it? calcium oxide carbon carbon dioxide slag ULES /12/F/M/16

9 9 27 The bodies of aircraft are often made using aluminium. Which two properties of aluminium make it suitable for this use? property 1 property 2 good conductor of electricity good conductor of heat good conductor of electricity strong good conductor of heat low density strong low density 28 The diagram shows how water is treated to make it suitable for drinking. stage 1 stage 2 reservoir stage 3 chlorination stage 4 drinking water What happens in stage 2? condensation distillation evaporation filtration 29 Pure air contains nitrogen, oxygen and small amounts of other gases. The noble gases have been left out of the table. Which row shows the composition of dry, unpolluted air? nitrogen / % oxygen / % other gases small amount of carbon dioxide small amount of carbon monoxide small amount of carbon dioxide small amount of carbon monoxide 30 Which pollutant gas can be produced as a result of incomplete combustion of octane, 8 18? carbon carbon dioxide carbon monoxide methane ULES /12/F/M/16 [Turn over

10 31 Fertilisers are used to provide three elements needed to increase the yield of crops. 10 Which two compounds would provide all three of these elements? ammonium nitrate and calcium phosphate ammonium nitrate and potassium sulfate potassium nitrate and calcium phosphate potassium nitrate and potassium sulfate 32 Which statement describes a disadvantage of sulfur dioxide? It can be used as a bleach in making wood pulp. It can be used to kill bacteria in food. It can be used to manufacture sulfuric acid. It can dissolve the limestone in statues. 33 Why does a farmer put lime (calcium oxide) on the soil? to act as a fertiliser to kill pests to make the soil less acidic to make the soil less alkaline ULES /12/F/M/16

11 11 34 What is the name of fraction X? fractions refinery gas gasoline X kerosene diesel oil lubricating fraction petroleum bitumen alcohol fuel oil naphtha paraffin 35 Which pair of molecules are hydrocarbons? ethane and ethanol ethane and ethene ethanoic acid and ethene ethanol and ethanoic acid 36 Which bond is not present in the structure of ethanol, 3 2 O? O O ULES /12/F/M/16 [Turn over

12 12 37 Which change on the diagram involves combustion? Some of the reaction products are not shown on the diagram. sugar + yeast in water change ethanol change change carbon dioxide ethene change poly(ethene) 38 The structures of three molecules are shown. O O O Which homologous series is not represented? alcohols alkanes alkenes carboxylic acids 39 Information about four hydrocarbons is shown. hydrocarbon number of carbon atoms in the molecule reaction with bromine water W 1 no reaction X 2 no reaction Y 3 decolourises it Z 4 decolourises it Which statement is correct? ydrocarbon W has the formula 4 and can be polymerised. ydrocarbon X has the formula 2 4 and can be polymerised. ydrocarbon Y has the formula 3 6 and can be polymerised. ydrocarbon Z has the formula 4 10 and can be polymerised. ULES /12/F/M/16

13 13 ULES /12/F/M/16 40 Which structure represents a compound that dissolves in water to form an acidic solution? O O O

14 14 LNK PGE ULES /12/F/M/16

15 15 LNK PGE Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (ULES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. 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. ambridge International Examinations is part of the ambridge ssessment Group. ambridge ssessment is the brand name of University of ambridge Local Examinations Syndicate (ULES), which is itself a department of the University of ambridge. ULES /12/F/M/16

16 16 ULES /12/F/M/16 Group The Periodic Table of Elements 1 hydrogen 1 2 e helium 4 I II III IV V VI VII VIII 3 Li lithium 7 4 e beryllium 9 atomic number atomic symbol Key name relative atomic mass 11 Na sodium Mg magnesium K potassium a calcium Rb rubidium Sr strontium s caesium a barium Fr francium 88 Ra radium 5 boron l aluminium Ga gallium In indium Tl thallium carbon Si silicon Ge germanium Sn tin Pb lead Ti titanium Zr zirconium f hafnium Rf rutherfordium 23 V vanadium Nb niobium Ta tantalum b dubnium 24 r chromium Mo molybdenum W tungsten Sg seaborgium 25 Mn manganese Tc technetium 75 Re rhenium h bohrium 26 Fe iron Ru ruthenium Os osmium s hassium 27 o cobalt Rh rhodium Ir iridium Mt meitnerium 28 Ni nickel Pd palladium Pt platinum s darmstadtium 29 u copper g silver u gold Rg roentgenium 30 Zn zinc d cadmium g mercury n copernicium 114 Fl flerovium 116 Lv livermorium 7 N nitrogen P phosphorus s arsenic Sb antimony i bismuth O oxygen S sulfur Se selenium Te tellurium Po polonium 9 F fluorine l chlorine r bromine I iodine t astatine 10 Ne neon r argon Kr krypton Xe xenon Rn radon 21 Sc scandium Y yttrium lanthanoids actinoids 57 La lanthanum c lanthanoids actinoids The volume of one mole of any gas is 24 dm 3 at room temperature and pressure (r.t.p.) actinium 58 e cerium Th thorium Pr praseodymium Pa protactinium Nd neodymium U uranium Pm promethium 93 Np neptunium 62 Sm samarium Pu plutonium 63 Eu europium m americium 64 Gd gadolinium m curium 65 Tb terbium k berkelium 66 y dysprosium f californium 67 o holmium Es einsteinium 68 Er erbium Fm fermium 69 Tm thulium Md mendelevium 70 Yb ytterbium No nobelium 71 Lu lutetium Lr lawrencium