Cambridge IGCSE Physical Science 0652 — 2003 Oct/Nov Paper 2 · Variant 1

This document consists of 12 printed pages. BR (PW) S41295/2 © CIE 2003 [Turn over CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education PHYSICAL SCIENCE 0652/02 Paper 2 October/November 2003 1 hour 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 in the spaces provided on the Question Paper. 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. Answer all questions. 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. A copy of the Periodic Table is printed on page 12. Centre Number Candidate Number Name If you have been given a label, look at the details. If any details are incorrect or missing, please fill in your correct details in the space given at the top of this page. Stick your personal label here, if provided. For Examiner’s Use 1 2 3 4 5 6 7 8 9 10 11 12 Total www.XtremePapers.com

1 (a) (i) Describe how a sodium atom, Na, forms a sodium ion, Na+. … …[1] (ii) Describe how a chlorine atom, Cl, forms a chloride ion, Cl –. … …[1] (iii) Hence describe how sodium chloride is formed from sodium and chlorine. … … …[2] (b) In terms of covalent bonding, explain how chlorine forms diatomic molecules, Cl2. … … …[2] 2 0652/02/O/N/03 For Examiner’s Use

3 0652/02/O/N/03 [Turn over 2 A scientist is studying the electromagnetic radiation received from a star. The graph in Fig. 2.1 shows the intensity of the radiation of different wavelengths. Fig. 2.1 The wavelength of visible light ranges from 0.45 to 0.75 micrometres, the shaded region on the graph. (a) In what regions of the electromagnetic spectrum are the points R and S? R … S …[2] (b) How does the speed in a vacuum of the radiation at R and at S compare? …[1] (c) At what wavelength is the intensity of the radiation greatest? … micrometres [1] intensity of radiation 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 wavelength/micrometre visible radiation R S For Examiner’s Use

4 0652/02/O/N/03 3 A small child has mixed together the salt and the pepper in the kitchen. Salt is soluble in water. Pepper is not soluble in water. Describe how to obtain salt and pepper separately from this mixture. … … … … … …[4] 4 Complete the table in Fig. 4.1 for the relative charge and approximate relative mass of a proton, a neutron and an electron. Fig. 4.1 [3] For Examiner’s Use approximate particle relative charge relative mass proton +1 neutron 1 1 electron –––– 2000

5 0652/02/O/N/03 [Turn over 5 (a) An athlete wins a trophy for completing a 200 m race in a time of 25 s. Calculate the average speed of the athlete. Show your working and state the unit. speed = … [3] (b) Fig. 5.1 shows four designs for the trophy, P, Q, R and S. The position of the centre of mass of each trophy is marked with an X. Fig. 5.1 State and explain which trophy would be the most stable. … … …[3] 6 (a) State two properties of iron which explain why this metal is described as a transition element. property 1 … property 2 … [2] (b) State two methods used to prevent iron rusting. method 1 … method 2 … [2] x x x x P Q R S For Examiner’s Use

6 0652/02/O/N/03 7 Fig. 7.1 shows an experiment to measure the half-life of an isotope of protactinium which decays by emission of beta-particles. Fig. 7.1 (a) (i) Explain what is meant by the term isotope. … …[2] (ii) Name a suitable detector. …[1] (iii) Explain why this method could not be used for a liquid that emits alpha-particles. … … …[2] (b) Protactinium has a half-life of 1 minute. In the experiment the initial count rate was 480 Bq. Calculate the count rate after 3 minutes. Show your working. count rate = … Bq. [3] (c) In a further experiment the background count rate was considered. Explain what is meant by the term background count rate. … … …[2] plastic bottle containing a solution of a protactinium salt detector ratemeter For Examiner’s Use

7 0652/02/O/N/03 [Turn over 8 Two students investigate the speed of reaction of zinc with dilute hydrochloric acid. (a) One student finds that adding water to dilute the acid makes the reaction slower. Use the kinetic particle theory of matter to explain why the reaction is slower when the acid is more dilute. … … …[2] (b) The other student finds that warming the acid makes the reaction faster. Use the kinetic particle theory of matter to explain why the reaction is faster when the acid is warmer. … … …[2] For Examiner’s Use

8 0652/02/O/N/03 9 (a) In terms of molecular structure, explain why butane is described as a saturated hydrocarbon. … … …[1] (b) The main use of butane is a fuel in the form of liquefied petroleum gas. (i) When butane is burnt completely in excess air, only two substances are formed. Name these two substances. substance 1 … substance 2 … [2] (ii) Explain why butane can be described as a clean fuel when burnt completely. … … …[2] For Examiner’s Use

9 0652/02/O/N/03 [Turn over 10 Fig 10.1 shows a bimetal strip before and after being heated. Fig. 10.1 (a) Explain why the strip bends when it is heated. … … …[2] (b) Fig. 10.2 shows a similar strip in a circuit. Fig. 10.2 (i) Explain why the lamp flashes on and off when switch S is closed. … … …[3] (ii) Suggest a use for such a circuit. …[1] S brass iron before heating after heating For Examiner’s Use

10 0652/02/O/N/03 11 (a) Use the following words to complete the table in Fig. 11.1. Each word may be used once, more than once or not at all. conductor high insulator low Fig. 11.1 [2] (b) Gold occurs naturally as an element. Iron is obtained from its ore by heating with carbon. Aluminium must be obtained from its ore by electrolysis which requires considerable energy. In terms of the reactivity of these metals, explain these facts. … … …[2] For Examiner’s Use density at conduction room temperature of electricity metals non-metals

11 0652/02/O/N/03 [Turn over 12 Fig. 12.1 shows a circuit designed to determine the resistance of a wire. However, the voltmeter has been omitted. Fig. 12.1 (a) (i) Complete the diagram to show how the voltmeter should be connected. (ii) Explain why the variable resistor is included in the circuit. … …[3] (b) The wire is replaced by a wire made from the same material and of the same length, but of twice the diameter. State how the resistance of the wires would compare. …[1] A wire For Examiner’s Use

12 0652/02/O/N/03 Group DATA SHEET The Periodic Table of the Elements 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