UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level

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1 * * UNIVERSITY F MRIGE INTERNTINL EXMINTINS General ertificate of Education rdinary Level EMISTRY 5070/12 Paper 1 Multiple hoice May/June 2013 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or is recommended) 1 hour RE TESE INSTRUTINS FIRST Write in soft pencil. o not use staples, paper clips, highlighters, 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. NT WRITE IN NY RES. 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. This document consists of 14 printed pages and 2 blank pages. I13 06_5070_12/4RP ULES 2013 [Turn over

2 1 Which mixture could best be separated by using a separating funnel? 2 oil and sand oil and water sodium chloride and sand sodium chloride and water 2 Which process involves boiling a liquid and condensing the vapour? crystallisation distillation evaporation filtration 3 Which compound, when mixed with aqueous barium nitrate, does not form a white precipitate? ammonium carbonate dilute sulfuric acid silver nitrate sodium carbonate 4 The structure of metals consists of positive ions in a sea of electrons. Which statement correctly describes what happens to the particles in the metallic heating element of an electric kettle when the kettle is switched on? Electrons move in both directions in the element. Electrons move in one direction only in the element. Electrons move in one direction and positive ions move in the opposite direction in the element. Positive ions move in one direction only in the element. 5 Naturally-occurring bromine has a relative atomic mass of 80 and consists entirely of two isotopes of relative atomic masses 79 and 81. What can be deduced about naturally-occurring bromine from this information only? romine contains the two isotopes in equal proportions. romine has different oxidation states. romine isotopes have different numbers of protons. romine is radioactive. ULES /12/M/J/13

3 3 6 Silicon carbide, Si, has a structure similar to diamond. oron nitride, N, has a structure similar to graphite. ronze is an alloy of copper and tin. Which statements about Si, N and bronze are correct? 1 ll are bonded covalently. 2 ll except silicon carbide conduct electricity when solid. 3 ll have high melting points. 1 and 2 only 1 and 3 only 2 and 3 only 1, 2 and 3 7 What can be deduced about two gases that have the same relative molecular mass? They have the same boiling point. They have the same number of atoms in one molecule. They have the same rate of diffusion at room temperature and pressure. They have the same solubility in water at room temperature. 8 Sodium is in Group I of the Periodic Table. When sodium combines with chlorine, what happens to each sodium atom? It gains one electron from one chlorine atom. It shares one electron with one chlorine atom. It transfers one electron to one chlorine atom. It transfers two electrons to one chlorine atom. 9 ydrogen and sulfur react to form the compound hydrogen sulfide. Which row shows the type of bonding between hydrogen and sulfur and the electrical conductivity of liquid hydrogen sulfide? type of bonding electrical conductivity in the liquid state covalent good covalent non-conductor ionic good ionic non-conductor ULES /12/M/J/13 [Turn over

4 10 Which statement about aqueous potassium sulfate is correct? 4 It contains more sulfate ions than potassium ions. It contains two different types of molecule. It does not conduct electricity. It forms a white precipitate when added to aqueous barium nitrate. 11 ne volume of a gaseous element X 2 combines with an equal volume of gaseous hydrogen to form two volumes of a gaseous hydride. What is the formula for the hydride of X? 2 X X X 2 2 X 2 12 The relative atomic mass of chlorine is What is the mass of 2 moles of chlorine gas? g 35.5 g 71 g 142 g 13 ow could a sample of potassium be obtained from potassium chloride, Kl? method 1 adding zinc to a solution of Kl method 2 electrolysing an aqueous solution of Kl method 3 electrolysing molten Kl method 1 only methods 1 and 2 methods 2 and 3 method 3 only 14 concentrated aqueous solution of copper(ii) chloride is electrolysed using inert electrodes. What is the product at the positive electrode? chlorine copper hydrogen oxygen ULES /12/M/J/13

5 15 The diagrams show an electrolysis experiment using inert electrodes. 5 liquid Y + + before electrolysis after electrolysis Which could be liquid Y? aqueous copper(ii) sulfate concentrated aqueous sodium chloride dilute sulfuric acid ethanol 16 The energy profile for the forward direction of a reversible reaction is shown. activation energy energy progress of reaction Which row correctly shows both the sign of the activation energy and the type of the enthalpy change for the reverse reaction? sign of activation energy enthalpy change negative endothermic negative exothermic positive endothermic positive exothermic ULES /12/M/J/13 [Turn over

6 17 Which ionic equation describes a redox reaction? g + (aq) + l (aq) gl (s) (aq) (aq) 2 (g) + 2 (l) + (aq) + (aq) 2 (l) Zn(s) + u 2+ (aq) Zn 2+ (aq) + u(s) 18 Four separate mixtures of a solution and a solid are made, as given in the table. The mixtures are warmed. In which mixtures does gas form? Na(aq) and N 4 l (s) Na(aq) and Mg(s) 2 S 4 (aq) and N 4 l (s) 2 S 4 (aq) and Mg(s) key = gas forms = no gas forms 19 Four oxides are added separately to aqueous sodium hydroxide. 1 aluminium oxide 2 carbon dioxide 3 copper(ii) oxide 4 magnesium oxide Which oxides react with aqueous sodium hydroxide? 1 and 2 only 1, 3 and 4 only 2 only 3 and 4 only ULES /12/M/J/13

7 7 20 hlorine can be manufactured by the following reaction. 4l (g) + 2 (g) 2 2 (g) + 2l 2(g) is negative mixture in dynamic equilibrium is formed. Which change to the mixture will increase the amount of chlorine at equilibrium? adding a catalyst adding more l (g) decreasing the pressure increasing the temperature 21 Which is a use of sulfuric acid? as a bleach in the manufacture of ammonia in the manufacture of fertilisers in the manufacture of sulfur trioxide 22 Which statement about ammonia is correct? It is a colourless, odourless gas. It is a gas which turns damp blue litmus paper red. It is formed when potassium nitrate is heated with aqueous sodium hydroxide and aluminium. It is manufactured using vanadium(v) oxide as a catalyst. 23 Which property is common to calcium, potassium and sodium? Their atoms all have more neutrons than protons. Their ions all have eight electrons in their outer shell. They all sink when added to water. They are all deposited at the positive electrode when their molten chloride is electrolysed. ULES /12/M/J/13 [Turn over

8 24 The table shows the solubility of some compounds of metal Q in cold water. 8 salt carbonate chloride sulfate solubility in cold water insoluble soluble insoluble What is metal Q? barium lead magnesium sodium 25 Which two statements indicate that metal M may have a proton number between 21 and 30? 1 It conducts electricity. 2 It does not react with water. 3 It forms two basic oxides with formulae M and M It forms two coloured sulfates. 1 and 2 1 and 4 2 and 3 3 and 4 26 n atom of which element has the same electronic configuration as the strontium ion? calcium krypton rubidium selenium 27 Which substance, in the given physical state, is found at the bottom of the blast furnace? substance physical state calcium carbonate solid calcium silicate liquid carbon liquid iron solid ULES /12/M/J/13

9 9 28 Gas Z is to be separated from a mixture of gases X, Y and Z by the apparatus shown in the diagram. X, Y, Z copper(ii) oxide Z heat aqueous sodium hydroxide water For which mixture will this system work successfully? X Y Z hydrogen carbon dioxide nitrogen oxygen hydrogen carbon monoxide nitrogen oxygen hydrogen carbon dioxide nitrogen oxygen 29 Magnesium can be obtained by heating magnesium oxide with which element? carbon hydrogen sodium zinc ULES /12/M/J/13 [Turn over

10 10 30 Methanol is manufactured using the following reaction. (g) (g) 3 (g) The usual conditions are 30 atmospheres and 300. t 400 the percentage of methanol in the equilibrium mixture is lower than at 300. What could be the explanation for this? ll the molecules are gaseous. The forward reaction is exothermic. The reaction is slower at 400. There are fewer product molecules than reactant molecules. 31 In the electrolysis of molten aluminium oxide for the extraction of aluminium, the following three reactions take place. 1 l e l e Which reactions take place at the positive electrode? 1 only 2 only 1 and 3 only 2 and 3 only 32 n alloy of copper and zinc is added to an excess of dilute hydrochloric acid. The resulting mixture is then filtered. Which observations are correct? filtrate residue colourless solution none colourless solution red-brown blue solution grey blue solution none ULES /12/M/J/13

11 11 33 The compounds (N 2 ) 2 and N 4 N 3 are used as fertilisers. The proportion of nitrogen by mass in (N 2 ) 2 is 1 that in N 4 N 3. The proportion of nitrogen by mole in (N 2 ) 2 is 2 that in N 4 N 3. Which words correctly complete gaps 1 and 2? 1 2 equal to equal to higher than equal to higher than higher than lower than lower than 34 Which method will remove salt from seawater? chlorination distillation filtration use of carbon 35 Which organic compound requires the least oxygen for the complete combustion of one mole of the compound? Which polymer contains only three elements? protein poly(ethene) poly(propene) starch ULES /12/M/J/13 [Turn over

12 12 37 What are the reactions of compounds W, X, Y and Z? W X Y Z decolourises aqueous bromine has a p of less than 7 reacts with a carboxylic acid to form an ester X and Y W, X and Y W, X, Y and Z X and Y X and Z X and Z W and Z W, X and Y X and Z W and Z X and Z W, X and Y 38 The diagram shows the partial structure of Terylene. From which pair of compounds is it made? Which straight chain hydrocarbon can form a polymer by addition polymerisation? ULES /12/M/J/13

13 13 40 Which information is correct regarding the formation of ethanol by the process of fermentation? substances fermented gas evolved during fermentation carbohydrates carbon dioxide carbohydrates carbon monoxide hydrocarbons carbon dioxide hydrocarbons carbon monoxide ULES /12/M/J/13

14 14 LNK PGE ULES /12/M/J/13

15 15 LNK PGE ULES /12/M/J/13

16 16 T SEET The Periodic Table of the Elements Group I II III IV V VI VII e ydrogen elium Li e N F Ne Lithium eryllium oron arbon Nitrogen xygen Fluorine Neon Na Mg l Si P S l r Sodium Magnesium luminium Silicon Phosphorus Sulfur hlorine rgon K a Sc Ti V r Mn Fe o Ni u Zn Ga Ge s Se r Kr Potassium alcium Scandium Titanium Vanadium hromium Manganese Iron obalt Nickel opper Zinc Gallium Germanium rsenic Selenium romine Krypton Rb Sr Y Zr Nb Mo Tc Ru Rh Pd g d In Sn Sb Te Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver admium Indium Tin ntimony Tellurium Iodine Xenon I Xe s a La f Ta W Re s Ir Pt u g Tl Pb i Po t Rn aesium arium Lanthanum afnium Tantalum Tungsten Rhenium smium Iridium Platinum Gold Mercury Thallium Lead ismuth Polonium statine Radon * Fr Ra c Francium Radium ctinium *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 59 Pa Protactinium Nd Neodymium 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 o olmium 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.). 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. University of 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/M/J/13