Cambridge IGCSE Physical Science 0652 — 2009 Oct/Nov Paper 2 · Variant 1

This document consists of 16 printed pages. IB09 11_0652_02/3RP © UCLES 2009 [Turn over *1002886569* For Examiner's Use 1 2 3 4 5 6 7 8 9 10 11 12 13 Total UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education PHYSICAL SCIENCE 0652/02 Paper 2 (Core) October/November 2009 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. A copy of the Periodic Table is printed on page 16. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. www.XtremePapers.com

2 © UCLES 2009 0652/02/O/N/09 For Examiner's Use 1 (a) Name the type of bonding in a hydrogen molecule, H2. [1] (b) Draw a dot and cross diagram to show the arrangement of the outer electrons in a molecule of hydrogen chloride gas, HCl. [1] (c) Give two characteristic properties of ionic compounds. 1. 2. [2]

3 © UCLES 2009 0652/02/O/N/09 [Turn over For Examiner's Use 2 Fig. 2.1 shows a circuit diagram, with a battery of e.m.f. 6.0 V and three identical resistors R1, R2 and R3. R1 R2 R3 6.0 V 2.4 A Fig. 2.1 (a) The current through R3 is 2.4 A. Calculate the resistance of R3. resistance = Ω [2] (b) Calculate the combined resistance of R1, and R2. resistance = Ω [1] (c) Use your answer to (b) to calculate the current through R1, and R2. current = A [2]

4 © UCLES 2009 0652/02/O/N/09 For Examiner's Use 3 (a) State what is meant by the term fuel. [1] (b) (i) Suggest two reasons why hydrogen makes a good fuel. 1. 2. [2] (ii) Suggest one reason why hydrogen is not widely used as a fuel. [1] (c) Ethanol is a useful fuel which can be made from sugar. (i) Name the process used to make ethanol from sugar. [1] (ii) Describe how you could show that carbon dioxide is produced in this reaction. [2] (iii) Name the process used to separate ethanol from the resulting mixture from c(i). [1]

5 © UCLES 2009 0652/02/O/N/09 [Turn over For Examiner's Use 4 A microphone is connected to a cathode ray oscilloscope. Fig. 4.1 shows the pattern produced on the cathode ray oscilloscope when a guitar string is plucked. Fig. 4.1 (a) (i) State how the trace changes if a louder note, of the same pitch, is played. [1] (ii) State how the trace changes if a higher pitched note is played. [1] (b) Bats navigate by emitting short high pitched sounds, above the threshold of human hearing. (i) State the maximum frequency that the human ear can detect. Hz [1] (ii) Sound travels at 320 m / s in air. A bat emits a pulse of sound and hears the echo from a wall 0.075 s later. Calculate the distance from the bat to the wall. Show your working. distance = m [3]

6 © UCLES 2009 0652/02/O/N/09 For Examiner's Use 5 (a) A fisherman is steering his boat using a single oar as shown in Fig. 5.1a. Fig. 5.1b shows the same boat viewed from above. To keep the oar stationary the fisherman applies a force of 250 N to the end of the oar. 250 N 2.4 m 0.6 m pivot fisherman Fig. 5.1a Fig. 5.1b (i) Calculate the moment produced by the fisherman about the pivot. Show your working. moment = Nm [2] (ii) Use your answer from (a)(i) to calculate the force the oar produces on the water. Show your working. force = N [2]

7 © UCLES 2009 0652/02/O/N/09 [Turn over For Examiner's Use (b) The boat moves through the water at a steady speed of 2.5 m / s for 12 s. It then decelerates to rest at a uniform rate in a further 8.0 s. (i) On Fig. 5.2 draw a speed-time graph to show this motion. 0 4 8 12 16 20 3.0 2.0 1.0 0 time / s speed in m / s [2] Fig. 5.2 (ii) Calculate the total distance travelled by the boat. Show your working. distance travelled = m [3] 6 Bronze, an alloy containing copper and tin, is used to make statues. (a) State what is meant by the term alloy. [1] (b) Name another alloy of copper and give a use for it. alloy use [2] (c) Car bodies can be made from mild steel. (i) State how car manufacturers try to prevent car bodies from rusting. [1] (ii) Suggest a reason why copper is not suitable for use in making car bodies. [1]

8 © UCLES 2009 0652/02/O/N/09 For Examiner's Use 7 A solar power station is designed for use in desert countries. Fig. 7.1 shows the steps involved in the production of electricity. solar furnace boils water steam drives turbine turbine turns generator generator supplies electricity thermal energy to desalination plant Fig. 7.1 (a) A solar furnace consists of many mirrors. These mirrors are arranged so that sunlight is reflected onto a large container of water, as shown in Fig. 7.2. mirrors water container steam to turbine sunlight Fig. 7.2 (i) Name the process by which the Sun’s energy is transmitted to Earth. [1] (ii) Fig. 7.3 shows a ray of sunlight incident on a mirror. Complete the diagram to show the ray after it is reflected from the mirror. mirror normal Fig. 7.3 [1] (iii) On Fig. 7.3, mark and label the angle of incidence and the angle of reflection. [1]

9 © UCLES 2009 0652/02/O/N/09 [Turn over For Examiner's Use (iv) State the relationship between the angle of incidence and the angle of reflection. [1] (b) (i) Name the process by which the energy is passed through the wall of the water container. [1] (ii) Explain why the water at the top of the water container is hotter than the water at the bottom of the container. [2] (c) (i) At the desalination plant the thermal energy from the turbine is used to recover pure water from sea water. Name the process by which pure water is recovered from sea water in this desalination plant. [1] (ii) Explain the advantage of combining the desalination plant with the power station. [1]

10 © UCLES 2009 0652/02/O/N/09 For Examiner's Use 8 Test-tubes A, B and C contain dilute hydrochloric acid. A different substance is added to each tube as shown in Fig. 8.1. A Universal Indicator paper B magnesium ribbon C magnesium carbonate Fig. 8.1 (a) Complete Table 8.1 to show what you would observe in each test-tube and name any gases produced. If no gas is produced write ‘no gas’ in the table. Table 8.1 test-tube observation gas A B C [6] (b) State any difference if sulfuric acid is used instead of hydrochloric acid. Explain your answer. [2]

11 © UCLES 2009 0652/02/O/N/09 [Turn over For Examiner's Use 9 (a) The isotope uranium-236 is unstable and undergoes fission. Explain what is meant by the term fission. [2] (b) State one advantage and one disadvantage of using nuclear energy to generate electricity. advantage disadvantage [2] 10 Ammonium sulfate, (NH4)2SO4, and ammonium nitrate NH4NO3 are important fertilizers. (a) In the first column of Table 10.1 complete the list of elements in ammonium sulfate, (NH4)2SO4. In the second column write the number of atoms of each element. Table 10.1 name of element number of atoms nitrogen [4] (b) Calculate the mass of nitrogen in one mole of ammonium nitrate, NH4NO3. mass = g [2]

12 © UCLES 2009 0652/02/O/N/09 For Examiner's Use 11 Fig. 11.1 shows the apparatus used to measure the half-life of the isotope, phosphorus - 34, which decays by emitting a β-particle. phosphorous-34 30 cm detector Fig. 11.1 (a) Explain how the apparatus would need to be altered if the isotope decayed by emitting an α-particle. [2] (b) Fig. 11.2 shows part of the table of readings taken in the experiment. number of counts per second time / s corrected counts per second 0 5 10 15 1396 1072 814 636 1368 1044 786 608 Fig. 11.2 (i) Explain why a corrected count rate is included. [2]

13 © UCLES 2009 0652/02/O/N/09 [Turn over For Examiner's Use (ii) The readings are plotted on Fig. 11.3. Complete the graph by drawing the best fit curve. 0 5 10 15 time / s 20 25 30 1400 1200 1000 800 600 400 200 0 count rate in counts per second Fig. 11.3 [1] (iii) Use the graph to find the half-life of the isotope. Show your working. half life = [2]

14 © UCLES 2009 0652/02/O/N/09 For Examiner's Use 12 Many modern cars have a catalytic converter in the exhaust system. (a) State the effect the catalyst has on the reactions taking place between the gases in the catalytic converter. [1] (b) The catalyst is spread very thinly on the surface of a ceramic material. (i) State why a ceramic material is used. [1] (ii) State why the catalyst is spread very thinly. [1] (c) State why the catalyst lasts for a long time. [1] (d) Carbon monoxide, CO, and nitrogen monoxide, NO, react together in catalytic converters to form carbon dioxide, CO2, and nitrogen, N2. Write a balanced equation for this reaction. [1]

15 © UCLES 2009 0652/02/O/N/09 [Turn over For Examiner's Use 13 (a) Complete Table 13.1 which is about sub-atomic particles. Table 13.1 particle relative mass relative charge electron neutron 1 + 1 [3] (b) What is meant by the proton number of an element? [1]

16 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 (UCLES) 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 Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. © UCLES 2009 0652/02/O/N/09 Group 140 Ce Cerium 58 141 Pr Praseodymium 59 144 Nd Neodymium 60 Pm Promethium 61 150 Sm Samarium 62 152 Eu Europium 63 157 Gd Gadolinium 64 159 Tb Terbium 65 162 Dy Dysprosium 66 165 Ho Holmium 67 167 Er Erbium 68 169 Tm Thulium 69 173 Yb Ytterbium 70 175 Lu Lutetium 71 232 Th Thorium 90 Pa Protactinium 91 238 U Uranium 92 Np Neptunium 93 Pu Plutonium 94 Am Americium 95 Cm Curium 96 Bk Berkelium 97 Cf Californium 98 Es Einsteinium 99 Fm Fermium 100 Md Mendelevium 101 No Nobelium 102 Lr Lawrencium 103 1 H Hydrogen 1 7 Li Lithium 3 23 Na Sodium 11 24 Mg Magnesium 12 40 Ca Calcium 20 45 Sc Scandium 21 48 Ti Titanium 22 51 V Vanadium 23 52 Cr Chromium 24 55 Mn Manganese 25 56 Fe Iron 26 59 Co Cobalt 27 59 Ni Nickel 28 64 Cu Copper 29 65 Zn Zinc 30 70 Ga Gallium 31 27 Al Aluminium 13 11 B Boron 5 12 C Carbon 6 14 N Nitrogen 7 16 O Oxygen 8 19 F Fluorine 9 28 Si Silicon 14 31 P Phosphorus 15 32 S Sulfur 16 35.5 Cl Chlorine 17 40 Ar Argon 18 20 Ne Neon 10 4 He Helium 2 73 Ge Germanium 32 75 As Arsenic 33 79 Se Selenium 34 80 Br Bromine 35 84 Kr Krypton 36 39 K Potassium 19 88 Sr Strontium 38 89 Y Yttrium 39 91 Zr Zirconium 40 93 Nb Niobium 41 96 Mo Molybdenum 42 Tc Technetium 43 101 Ru Ruthenium 44 103 Rh Rhodium 45 106 Pd Palladium 46 108 Ag Silver 47 112 Cd Cadmium 48 115 In Indium 49 119 Sn Tin 50 122 Sb Antimony 51 128 Te Tellurium 52 127 I Iodine 53 131 Xe Xenon 54 137 Ba Barium 56 139 La Lanthanum 57 * 178 Hf Hafnium 72 181 Ta Tantalum 73 184 W Tungsten 74 186 Re Rhenium 75 190 Os Osmium 76 192 Ir Iridium 77 195 Pt Platinum 78 197 Au Gold 79 201 Hg Mercury 80 204 Tl Thallium 81 207 Pb Lead 82 209 Bi Bismuth 83 Po Polonium 84 At Astatine 85 Rn Radon 86 Fr Francium 87 227 Ac Actinium 89 9 Be Beryllium 4 I II III IV V VI VII 0 85 Rb Rubidium 37 133 Cs Caesium 55 226 Ra Radium 88 The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.). a X b a = relative atomic mass X = atomic symbol b = proton (atomic) number Key *58-71 Lanthanoid series 90-103 Actinoid series DATA SHEET The Periodic Table of the Elements

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education MARK SCHEME for the October/November 2009 question paper for the guidance of teachers 0652 PHYSICAL SCIENCE 0652/02 Paper 2 (Core Theory), maximum raw mark 80 This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes must be read in conjunction with the question papers and the report on the examination. • CIE will not enter into discussions or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the October/November 2009 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses. www.XtremePapers.com

Page 2 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – October/November 2009 0652 02 © UCLES 2009 1 (a) covalent [1] (b) correct arrangement with shared electron pair, correct outer shells [1] (c) any two from: high melting point electrolyte when molten or aqueous crystalline soluble in water etc. 1 + 1 [2] [Total: 4] 2 (a) R = V / I or 6.0 / 2.4 1 = 2.5 Ω 1 [2] (b) 5.0 Ω (e.c.f.) [1] (c) I = V / R or = 6 / 5 (e.c.f.) 1 = 1.2 A 1 [2] [Total: 5] 3 (a) substance which (is burned to) release heat / energy [1] (b) (i) any two from: non-polluting / makes only water when burned easy to transport through pipes lights easily high heat output etc. 1 + 1 [2] (ii) has to be manufactured / etc. [1] (c) (i) fermentation [1] (ii) add to limewater 1 turns cloudy / milky / white precipitate 1 [2] (iii) fractional distillation [1] [Total: 8]

Page 3 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – October/November 2009 0652 02 © UCLES 2009 4 (a) (i) greater amplitude [1] (ii) more waves on screen / waves close together (accept higher frequency / shorter wavelength) [1] (b) (i) 20 000 Hz (20 kHz) (accept 10 – 30 kHz) [1] (ii) v = distance / time or distance = vt or 320 × 0.075 1 = 24 m 1 bat ½ this distance = 12 m from wall 1 [3] [Total: 6] 5 (a) (i) moment = 250 × 0.6 1 = 150 (Nm) 1 [2] (ii) 150 = F × 2.4 1 F = 63 (62.5) N 1 (if final force (62.5 N) is correctly found and inserted into (i) score 3 out of 4 marks, ignore remainder in (ii)). [2] (b) (i) horizontal line at 2.5 m 1 diagonal line to time axis covering 8 s. 1 [2] (ii) attempt to find area under graph 1 (2.5 × 12) + (½ × 2.5 × 8) 1 = 40 m 1 [3] [Total: 9] 6 (a) mixture of metals [1] (b) e.g. brass 1 ornaments / electrical terminals / etc. 1 [2] (c) (i) painting / chrome plating / etc. [1] (ii) too dense / too expensive / not strong enough / etc. [1] [Total: 5]

Page 4 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – October/November 2009 0652 02 © UCLES 2009 7 (a) (i) radiation [1] (ii) ray correctly drawn [1] (iii) both angle of incidence and angle of reflection correctly drawn [1] (iv) angle of incidence = angle of reflection [1] (b) (i) conduction [1] (ii) hot water less dense than cold 1 therefore floats / rises to the top 1 [2] (mention of convection – C1) (c) (i) distillation [1] (ii) idea of waste energy from turbine used [1] [Total: 9] 8 (a) A turns red no gas 1 + 1 B fizzes / dissolves hydrogen 1 + 1 C fizzes / dissolves carbon dioxide 1 + 1 [6] (b) no change 1 relevant explanation about acids e.g. all contain hydrogen ions, etc. 1 [2] [Total: 8] 9 (a) splitting of nucleus (into two more or less equal halves) 1 with release of energy 1 [2] (b) advantage: no greenhouse gases released / chemical pollutants 1 disadvantage: danger of radioactive substances leaking / difficulty of dealing with long half-life waste (do not accept explosions, etc.) 1 [2] [Total: 4]

Page 5 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – October/November 2009 0652 02 © UCLES 2009 10 (a) 2 hydrogen 8 sulfur 1 oxygen 4 (3 correct names = 1 mark) (4 correct numbers = 3 marks; 3 correct = 2 marks; 2 correct = 1 mark) [4] (b) 28 g (allow one mark for ‘2 atoms nitrogen’ with incorrect final answer) (calculation of mass of one mole of ammonium hydroxide = (80) C1) [2] [Total: 6] 11 (a) source (much) nearer to detector 1 because alphas short range or different type of detector 1 [2] (b) (i) mention of background count 1 subtracted from original count 1 [2] (ii) smooth curve going within 1 square of all points [1] (iii) clear working or 12.5 ± 1.0 s 1 12.5 ± 0.5 s 1 [2] [Total: 7] 12 (a) faster [1] (b) (i) unreactive / can withstand high temperature / etc. [1] (ii) only small amount needed / increases surface / etc. [1] (c) not used up by reactions [1] (d) 2CO + 2NO → 2CO2 + N2 (correct formulae – 1 mark correct balancing – 1 mark) [1] [Total: 5]

Page 6 Mark Scheme: Teachers’ version Syllabus Paper IGCSE – October/November 2009 0652 02 © UCLES 2009 13 (a) particle relative mass relative charge electron 0 / very small / 1/2000 etc. –1 neutron 1 0 proton 1 + 1 [3] (b) number of protons in an atom / nucleus [1] [Total: 4]