UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level

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1 UNIVERSITY OF MRIGE INTERNTIONL EXMINTIONS General ertificate of Education Ordinary Level * * EMISTRY 5070/01 Paper 1 Multiple hoice May/June 2009 dditional Materials: RE TESE INSTRUTIONS FIRST Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or is recommended) 1 hour 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. 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. This document consists of 15 printed pages and 1 blank page. I09 06_5070_01/3RP ULES 2009 [Turn over

2 2 1 n inflated balloon goes down because gas molecules can diffuse through the rubber. Four balloons are filled with different gases at the same temperature and pressure. Which balloon would go down quickest? carbon dioxide, O 2 methane, 4 nitrogen, N 2 oxygen, O 2 2 The diagram shows a chromatogram of several inks. Which statement is correct? black blue brown green red yellow lack ink can be made by mixing green, red and yellow inks. rown ink can be made by mixing blue and red inks. Yellow ink can be used to make brown ink. Yellow ink may be present in green ink. ULES /01/M/J/09

3 3 The oxidation of ethanol to ethanoic acid is often carried out in the apparatus shown. 3 condenser water ethanol + oxidising agent heat What is the purpose of the condenser? to prevent air reacting with the ethanoic acid to prevent any ethanol from escaping to prevent the ethanoic acid changing back to ethanol to prevent the ethanoic acid reacting with the ethanol ULES /01/M/J/09 [Turn over

4 4 4 The diagram shows copper(ii) oxide being reduced, by hydrogen, to copper. fter reduction is complete, the burner is turned off but the flow of hydrogen is continued until the tube is cool. dry excess hydrogen hydrogen copper(ii) oxide burner Why is the hydrogen allowed to flow through the tube during cooling? to allow the tube to cool slowly to lessen the risk of explosion in the hot tube to prevent the copper from reacting with the air to remove any traces of water left in the tube 5 coin is analysed by dissolving it in nitric acid. To the resulting solution an excess of aqueous ammonia is added and the mixture is filtered. brown precipitate remains in the filter paper and a deep blue solution is obtained as the filtrate. Which metals does the coin contain? aluminium and copper copper and iron iron and lead lead and zinc 6 n element X forms a positive ion with the electronic structure 2,8,8. What is the proton (atomic) number of X? Which two substances are elements with a giant molecular structure? diamond and graphite diamond and sand methane and iodine methane and sand ULES /01/M/J/09

5 8 Which compound has both ionic and covalent bonds? 5 ammonium chloride carbon dioxide ethyl ethanoate sodium chloride 9 Which statement about the numbers of particles in atoms is correct? part from hydrogen, most atoms contain more neutrons than protons. more protons than neutrons. more electrons than protons. more protons than electrons. 10 Which gas contains the same number of molecules as 9 g of water? 2 g of hydrogen 14 g of nitrogen 32 g of oxygen 44 g of carbon dioxide 11 The equation for the reaction between copper and nitric acid is shown. vu + wno 3 xu(no 3 ) 2 + yno + z 2 O v, w, x, y and z are whole numbers. Which values of v, w, x, y and z balance the equation? v w x y z The mass of one mole of a chloride formed by a metal Y is 74.5 g. What is the formula of the chloride? Y 3 l Y 2 l Yl Yl 2 ULES /01/M/J/09 [Turn over

6 6 13 Which reactions take place during the electrolysis of aqueous copper(ii) sulfate with copper electrodes? reaction at positive electrode reaction at negative electrode u e u u u e 4O 2 2 O + O 2 + 4e u e u u u e e 2 u u e u e u 14 The diagram shows apparatus used to investigate the conductivity of different solutions. lamp platinum electrodes solution Which substance, in aqueous solution of concentration 1 mol / dm 3, would cause the lamp to give the brightest light? ammonia ethanoic acid ethanol sulfuric acid 15 The energy diagram for the reaction between sodium hydroxide and hydrochloric acid is shown. + (aq) + O (aq) energy = 54 kj / mol 2 O(l) Which quantity of heat is liberated when 100 cm 3 of 1 mol / dm 3 hydrochloric acid reacts with 100 cm 3 of 1 mol / dm 3 sodium hydroxide? 0.54 kj 2.70 kj 5.40 kj 10.8 kj ULES /01/M/J/09

7 7 16 The equation shows a reversible reaction. N 2 O 4 (g) 2NO 2 (g) The forward reaction is endothermic. Which of these changes will increase the yield of NO 2? pressure temperature decreased decreased decreased increased increased decreased increased increased 17 In experiment 1, an excess of finely powdered marble is added to 20 cm 3 of dilute hydrochloric acid. In experiment 2, carried out under the same conditions of temperature and pressure, an excess of marble chips is added to 20 cm 3 of dilute hydrochloric acid of the same concentration. The total volumes of carbon dioxide given off are determined at intervals and plotted against time. X total volume of O 2 Y Z 0 0 time Which pair of curves is obtained in the two experiments? experiment 1 experiment 2 X Z X Y Y Z Y X ULES /01/M/J/09 [Turn over

8 8 18 What is not an example of oxidation? converting iron(iii) salts into iron(ii) salts converting magnesium atoms into magnesium ions dissolving of a copper anode during electrolysis liberating chlorine from a chloride 19 Which metal has a soluble carbonate, chloride and sulfate? barium calcium copper potassium 20 Sodium hydroxide solution was added to dilute hydrochloric acid. The p of the solution in the flask was measured at intervals until no further change of p took place. sodium hydroxide solution hydrochloric acid What would be the p change in this reaction? decrease to 1 decrease to 7 increase to 7 increase to Why is nickel used in the addition of hydrogen to alkenes? It increases the yield of products. It lowers the activation energy of the reaction. It makes the reaction more exothermic. It prevents a reverse reaction from occurring. ULES /01/M/J/09

9 9 22 aesium, s, is an element in Group I of the Periodic Table. Which statements about aesium are true? 1 aesium conducts electricity both when solid and when molten. 2 aesium reacts explosively with water. 3 aesium reacts with water and forms a solution of p < 7. 1 and 2 only 1 and 3 only 2 and 3 only 1, 2 and 3 23 Elements with the code letters Q and R occupy the positions shown in the outline of the Periodic Table. Q R What is the formula of the compound formed between them? QR 2 Q 2 R Q 2 R 3 Q 3 R 2 24 The list shows some properties of metals. 1 Metals are good conductors of electricity. 2 Metals form ions by the loss of electrons. 3 Metals have high melting points. Mercury is a metallic element. Which of these statements do not apply to mercury? 1 only 1 and 2 2 and 3 3 only ULES /01/M/J/09 [Turn over

10 10 25 In the electrolysis of aluminium oxide to extract pure aluminium a compound called cryolite is first added to the oxide. What is the reason for adding the cryolite? to reduce the corrosion of the carbon electrodes by oxygen to reduce energy costs to enable the aluminium ions and oxygen ions to move to the electrodes to prevent the aluminium formed from being oxidised back to aluminium oxide 26 Iron is extracted from its ore haematite, Fe 2 O 3, by a reduction process in the blast furnace. Which equation for reactions in the blast furnace shows the formation of the reducing agent? ao 3 ao + O 2 ao + SiO 2 asio 3 O 2 + 2O + O 2 O 2 27 The steel bodies of cars can be protected from rusting by spraying them with zinc. Why is zinc used? Zinc does not react with acidic exhaust fumes. Zinc forms a stable compound with iron. Zinc has a high melting point. Zinc is higher in the reactivity series than iron. 28 Solid Y is insoluble in water. It gives off a gas when heated and also when reacted with dilute sulfuric acid. What is Y? copper(ii) carbonate sodium carbonate sodium nitrate zinc oxide ULES /01/M/J/09

11 29 What is the ionic equation for the reaction between zinc and aqueous copper(ii) sulfate? 11 Zn 2+ (aq) + u(s) Zn(s) + u 2+ (aq) Zn 2+ (aq) + SO 2 4 (aq) ZnSO 4 (s) Zn(s) + uso 4 (aq) ZnSO 4 (aq) + u(s) Zn(s) + u 2+ (aq) Zn 2+ (aq) + u(s) 30 Which gas reacts with sulfuric acid to form a fertiliser? ammonia, N 3 carbon dioxide, O 2 hydrogen, 2 nitrogen, N 2 31 In the ontact process, the sulfur trioxide formed is passed into concentrated sulfuric acid. passed into dilute sulfuric acid. passed into oleum ( 2 S 2 O 7 ). passed into water. 32 Which gas, present in pond water, decreases in concentration during eutrophication? carbon dioxide methane nitrogen oxygen 33 Methane is a greenhouse gas. Which process releases methane into the air? combustion of petrol decay of vegetable matter photosynthesis volcanic activity ULES /01/M/J/09 [Turn over

12 34 arbon dioxide and carbon monoxide are both 12 absorbed by sodium hydroxide. colourless. inflammable in air. lighter than air. 35 Which hydrocarbon will burn completely in oxygen to give equal numbers of moles of carbon dioxide and water? The diagram shows the breakdown of an alkane to ethene. mineral wool soaked in liquid alkane aluminium oxide ethene heat water The ethene is then tested with aqueous bromine. Which information about ethene is correct? solubility of ethene gas action on aqueous bromine insoluble decolourised insoluble no reaction soluble decolourised soluble no reaction ULES /01/M/J/09

13 37 arbohydrates, proteins, fats and Terylene are macromolecules. 13 Which element is found in only one of these macromolecules? carbon hydrogen nitrogen oxygen 38 Which structure is not an isomer of the structure shown? ULES /01/M/J/09 [Turn over

14 39 lcohols can be oxidised to form another homologous series of compounds. 14 What would be the product of the oxidation of propanol? O O O O O 40 polymer X is hydrolysed and the two products are O O O O and N N What can be deduced about X? It is a condensation polymer. It is made by addition polymerisation. It is starch. It is Terylene. ULES /01/M/J/09

15 15 LNK PGE 5070/01/M/J/09

16 16 T SEET The Periodic Table of the Elements Group I II III IV V VI VII ydrogen 2 4 e elium 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 Sulphur 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 f afnium Ta Tantalum W Tungsten Re Rhenium Os Osmium Ir Iridium Pt Platinum u Gold g 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 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 /01/M/J/09