Cambridge IGCSE Physical Science 0652 — 2007 Oct/Nov Paper 2 · Variant 1

This document consists of 15 printed pages and 1 blank page. IB07 11_0652_02/3RP © UCLES 2007 [Turn over *7894890047* 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 2007 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 2007 0652/02/O/N/07 For Examiner's Use 1 Fig. 1.1 shows the speed of a car as it moves along a straight, level track. 0 0.5 1.0 1.5 time / s 2.0 2.5 3.0 20 15 10 5 0 speed m / s Fig. 1.1 (a) What was the initial speed of the car? m / s [1] (b) Describe the motion of the car during (i) the first 1.5 s, (ii) from 1.5 s to 3.0 s. [3] (c) Calculate the distance the car travelled in the first 1.5 s. Show your working. distance = unit [3]

3 © UCLES 2007 0652/02/O/N/07 [Turn over For Examiner's Use 2 (a) Balance this equation for the burning of methane in a limited supply of air. …CH4 + …O2 …H2O + …CO [1] (b) Explain why it is dangerous to release carbon monoxide into the air. [2] (c) Name the compound of carbon formed when methane burns in a plentiful supply of air. [1] 3 Complete Table 3.1 by giving the formula of each of these pollutants, naming a source of each, and a problem caused by releasing each into the atmosphere. Table 3.1 pollutant formula source problem sulphur dioxide nitrogen dioxide [6]

4 © UCLES 2007 0652/02/O/N/07 For Examiner's Use 4 Fig. 4.1 shows a view from above as a set of ripples move out from a point when a stone is thrown into a pond. edge of the pond wavefronts Fig. 4.1 (a) (i) Mark on Fig. 4.1 one wavelength and label it λ. (ii) A boy counts 12 waves hitting the bank in 5.0 s. Calculate the frequency of the waves. Show your working. frequency = unit [4] (b) The water is shallower near the bank and the waves slow down. Suggest what effect that this will have on (i) the wavelength of the waves, (ii) the frequency of the waves. [2]

5 © UCLES 2007 0652/02/O/N/07 [Turn over For Examiner's Use 5 Fig. 5.1 shows three test-tubes with pieces of different metal foil added to solutions containing metal ions. The observations seen in each test-tube are also given. magnesium Cu2+ ions in solution zinc Cu2+ ions in solution zinc Mg2+ ions in solution magnesium disappears copper-coloured solid formed zinc becomes copper-coloured no reaction Fig. 5.1 (a) Use the results to work out the order of reactivity of the three metals. most reactive least reactive [2] (b) Complete this equation for the reaction when magnesium is added to aqueous copper(II) sulphate. Mg + CuSO4 [1] … + … (c) What happens when a piece of copper foil is put into a solution containing magnesium ions? [1]

6 © UCLES 2007 0652/02/O/N/07 For Examiner's Use 6 A student has a cell, three identical resistors, and an ammeter. He builds the circuits shown in Fig. 6.1. A circuit 1 A circuit 2 A circuit 3 A circuit 4 Fig. 6.1 (a) (i) In which circuit is the ammeter reading the highest? circuit (ii) Explain your answer. [3]

7 © UCLES 2007 0652/02/O/N/07 [Turn over For Examiner's Use (b) The student now rebuilds circuit 2 as shown in Fig. 6.2. A Fig. 6.2 Explain, giving a reason, how the ammeter reading compares with the reading in the original circuit 2. [2] (c) He now rebuilds circuit 3, as shown in Fig. 6.3. A Fig. 6.3 Explain, giving a reason, how the ammeter reading compares with the reading in the original circuit 3. [2]

8 © UCLES 2007 0652/02/O/N/07 For Examiner's Use 7 Sodium is an element in Group I of the Periodic Table. (a) Complete Table 7.1 for an atom of sodium by reference to the Periodic Table shown on page 16. Table 7.1 proton (atomic) number relative atomic mass number of neutrons in the nucleus arrangement of electrons in shells [4] (b) Write down the name and symbol of a Group I element which is less reactive than sodium. name symbol [2] 8 Fig. 8.1 shows the apparatus used to compare the penetration of different radioactive emissions. source absorber detector counter Fig. 8.1 Table 8.1 shows the count obtained in 2 minutes using different sources, with different absorbers. Table 8.1 source count with no absorber count with paper absorber count with aluminium absorber count with lead absorber krypton-85 3270 3268 14 12 americium-240 5854 1649 1644 103

9 © UCLES 2007 0652/02/O/N/07 [Turn over For Examiner's Use (a) (i) State, with reasons, the type or types of radiation emitted by the krypton-85 source. (ii) State, with reasons, the type or types of radiation emitted by the americium-240 source. [6] (b) Care must be taken when handling or storing radioactive materials. (i) State one precaution which must be used when handling radioactive materials. (ii) State one precaution which must be used when storing radioactive materials. [2]

10 © UCLES 2007 0652/02/O/N/07 For Examiner's Use 9 Ethane and ethene are gases which can be obtained from crude oil. (a) State the formula of ethene. [1] (b) Describe the difference in the structures of ethane and ethene. [2] (c) Describe a test to distinguish between ethane and ethene. test result with ethene result with ethane [3] (d) What do we call the process of making poly(ethene) from ethene? [1]

11 © UCLES 2007 0652/02/O/N/07 [Turn over For Examiner's Use 10 Fig. 10.1 shows the structure of a cathode ray tube. K A X-plates Y-plates Fig. 10.1 (a) Explain how parts K and A produce cathode rays. [4] (b) Fig. 10.2a and Fig. 10.2b show two waveforms displayed on the cathode ray oscilloscope. The settings of the oscilloscope are the same in each case. Fig. 10.2a Fig. 10.2b (i) State, giving a reason, which of the waves has the greater amplitude. (ii) State, giving a reason, which of the waves has the greater frequency. [3]

12 © UCLES 2007 0652/02/O/N/07 For Examiner's Use 11 Limestone is an important raw material. (a) Give the name and formula of the main calcium compound present in limestone. name formula [2] (b) (i) How can calcium oxide (lime) be made from limestone? [1] (ii) What needs to be added to calcium oxide to make calcium hydroxide (slaked lime)? [1] (iii) The reaction to make calcium hydroxide is exothermic. What does exothermic mean? [1] (c) Why do farmers sometimes spread calcium hydroxide on the soil in their fields? [1]

13 © UCLES 2007 0652/02/O/N/07 [Turn over For Examiner's Use 12 Fig. 12.1 shows a ray of light incident on a parallel sided glass block. glass block Fig. 12.1 (a) Complete the path of the light as it passes through and leaves the block. [3] (b) Mark on Fig. 12.1 (i) the angle of incidence and label it i, (ii) the angle of refraction and label it r. [2]

14 © UCLES 2007 0652/02/O/N/07 For Examiner's Use 13 Chlorine is a reactive element in Group VII of the Periodic Table. (a) Why is chlorine often added to drinking water supplies? [1] (b) Complete Table 13.1 by naming the type of bonding present in each of these substances. Table 13.1 substance type of bonding present chlorine hydrogen chloride sodium chloride [2] (c) (i) What is the symbol for a chloride ion? [1] (ii) How many electrons are in the outer shell of a chloride ion? [1] (iii) How is the electron structure of Group 0 elements such as neon similar to that of ions such as a chloride ion? [2]

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 2007 0652/02/O/N/07 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 Sulphur 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 2007 question paper 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. All Examiners are instructed that alternative correct answers and unexpected approaches in candidates’ scripts must be given marks that fairly reflect the relevant knowledge and skills demonstrated. 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 2007 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 Syllabus Paper IGCSE – October/November 2007 0652 02 © UCLES 2007 1 (a) 20 (m/s) 1 [1] (b) (i) constant speed or implied, e.g. continues at 20 m/s, 1 (ii) deceleration not accept decreasing acceleration 1 constant +1 [3] (constant acceleration 1) (c) use of area under graph OR speed x time OR 20 x 1.5 1 = 30 1 m 1 [3] [Total: 7] 2 (a) 2 3 4 2 (accept correct multiples) 1 [1] (b) toxic/poisonous interferes with respiration or implied, e.g. less oxygen passed around prevents oxygen/carbon dioxide exchange combines with haemoglobin/red blood cells ANY TWO 1 + 1 [2] (c) carbon dioxide 1 [1] [Total: 4] 3 SO2 burning fossil fuels, etc. acid rain/consequence 3 [3] NO2 car engines acid rain/consequence 3 [3] [Total: 6] 4 (a) (i) wavelength correctly marked 1 (ii) f = 12/5 1 = 2.4 1 Hz or per second 1 [4] (b) (i) gets shorter accept wavelengths get closer together 1 (ii) remains the same 1 [2] [Total: 6]

Page 3 Mark Scheme Syllabus Paper IGCSE – October/November 2007 0652 02 © UCLES 2007 5 (a) magnesium most reactive 1 copper least reactive 1 [2] (allow one mark if copper and magnesium reversed with zinc in middle, ignore ‘in Mg2+ etc’.) (b) Mg + CuSO4 → Mg SO4 + Cu 1 [1] (c) no reaction/nothing/no change 1 [1] [Total: 4] 6 (a) (i) circuit 4 1 [1] (ii) lowest resistance +1 resistors in parallel +1* three in parallel, lower resistance than two in parallel +1* [any 2] (b) reading the same 1 Current the same all the way round a (series) circuit +1 [2] (c) reading less or ½ original 1 Current splits between +1 [2] [Total: 7] 7 (a) 11 1 23 1 12 or difference between RAM & proton number 1 2.8.1 (accept 1s2 2s2 2p6 3s1) (ecf from proton number) 1 [4] (b) lithium 1 Li ecf for other Group 1 elements only 1 [2] [Total: 6]

Page 4 Mark Scheme Syllabus Paper IGCSE – October/November 2007 0652 02 © UCLES 2007 8 (a) (i) beta (this mark can only be scored if no other radiation is stated) 1 betas absorbed by aluminium 1 (Not accept if either included) (ii) alpha 1 gamma 1 alphas stopped by paper 1 gammas go through aluminium but stopped by lead 1 [6] (If α, β and γ give 0q, 0q then mark on merit) (b) (i) Use of tongs, hold away from body, wear lead apron etc. 1 (ii) Store in lead box/fireproof container/locked store 1 [2] [Total: 8] 9 (a) C2H4 (accept correct structural formula) 1 [1] (b) ethene is unsaturated/has a double bond 1 ethane is saturated/has only single bonds 1 [2] (c) bromine water 1 decolourised 1 no reaction/remains brown/yellow 1 [3] (d) polymerisation 1 [1] [Total: 7] 10 (a) K is the cathode 1 cathode hot 1 emits electrons 1 A is anode/positive 1 accelerates electrons 1 [any 4] (b) (i) b: greater peak to peak on trace 1 (ii) b: more waves on screen 1 thus more waves per second 1 [3] [Total: 7]

Page 5 Mark Scheme Syllabus Paper IGCSE – October/November 2007 0652 02 © UCLES 2007 11 (a) calcium carbonate 1 CaCO3 1 [2] (b) (i) heating 1 (ii) water 1 (iii) heat/energy given out 1 [3] (c) neutralise acid/increase pH (NOT fertiliser/to make crops grow) 1 [1] [Total: 6] 12 (a) refracted towards normal (NOT along or beyond) 1 refracted away from normal at exit 1 emergent ray parallel to incident ray 1 [3] (refraction beyond or along normal at first face only third mark can score, refraction away from normal at first face allow ecf if consistent at second face, i.e. 2nd & 3rd marks can score) (b) (i) normal drawn and angle of incidence correctly marked 1 (ii) normal drawn and angle of incidence correctly marked 1 [2] [Total: 5] 13 (a) kill bacteria/germs/micro-organisms 1 [1] (b) all three correct (2 correct – 1 mark) 2 [2] covalent covalent ionic (c) (i) Cl– 1 (ii) 8 1 (iii) full/complete outer shell 1 Clear that both Cl and neon have full outer shell 1 [4] (allow 1 mark for the same number of electrons) [Total: 7]