Cambridge IGCSE Physical Science 0652 — 2005 Oct/Nov Paper 2 · Variant 1

Centre Number Candidate Number Name UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education PHYSICAL SCIENCE 0652/02 Paper 2 October/November 2005 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 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. 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 16. For Examiner’s Use 1 2 3 4 5 6 7 8 9 10 11 12 13 Total This document consists of 16 printed pages. IB05 11_0652_02/3RP  UCLES 2005 [Turn over 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. www.XtremePapers.com

2 © UCLES 2005 0652/02/O/N/05 For Examiner's Use 1 (a) A glider is an aeroplane without an engine. Glider pilots use columns of rising warm air to lift their gliders to a greater height, as shown in Fig. 1.1. glider hot air rising Fig. 1.1 (i) Name the process which causes the warm air to rise. (ii) Explain why the warm air rises. [3] (b) The warm air sometimes carries water vapour higher into the atmosphere where it changes to small water drops to form clouds. Name the process when water vapour turns to liquid. [1]

3 © UCLES 2005 0652/02/O/N/05 [Turn over For Examiner's Use (c) As the water drops get larger they begin to fall. Fig. 1.2 shows a speed – time graph of the fall of one of the water drops. speed time A B D C Fig. 1.2 (i) Describe the motion of the water drop between points A and B. (ii) Describe the motion of the water drop between points C and D. [3]

4 © UCLES 2005 0652/02/O/N/05 For Examiner's Use 2 A coloured gas is put into the bottom of a gas-jar of air. The lid is quickly replaced on the jar. This is shown in Fig. 2.1. After several minutes the coloured gas can be seen halfway up the jar. This is shown in Fig. 2.2. lid gas-jar coloured gas lid gas-jar coloured gas Fig. 2.1 Fig. 2.2 (a) Name this process of one gas mixing slowly with another. [1] (b) The molecules of the coloured gas move about quickly yet the process of mixing with the air is very slow. Explain why the mixing is slow. [2] 3 The properties of iron can be changed by the controlled use of additives to form steel alloys. (a) State one use of mild steel. State one use of stainless steel. [2]

5 © UCLES 2005 0652/02/O/N/05 [Turn over For Examiner's Use (b) A piece of mild steel in everyday use is protected with paint. Stainless steel does not need this protection. Explain this difference. [2] 4 In a coal-fired power station coal is burnt in a furnace. This heats water to provide steam to drive a generator. (a) Complete the sentences below to explain the energy changes. In the furnace energy of the coal is converted to energy in the steam. This is then converted into energy at the generator. [3] Another method of obtaining steam to drive a generator is to pump water deep into the ground. The water is heated by hot rocks. (b) (i) What name is given to this type of power station? (ii) State one advantage of this method over the coal-fired power station. [2] (c) Explain how the generator is driven in a hydroelectric power station. In your answer refer to relevant energy changes. [2]

6 © UCLES 2005 0652/02/O/N/05 For Examiner's Use 5 (a) A method to separate and analyse mixtures uses a vertical strip of paper dipping into a solvent. (i) Name this method of separating mixtures. [1] (ii) Some experiments using this method require a locating agent to show the positions of the components. Explain why a locating agent may be required. [1] (b) Bitumen is used to make roads. Describe how bitumen is obtained from the mixture of hydrocarbons in crude oil (petroleum). [2]

7 © UCLES 2005 0652/02/O/N/05 [Turn over For Examiner's Use 6 Fig. 6.1 shows the electromagnetic spectrum. radio waves infra red X-rays P visible gamma rays micro waves increasing frequency Fig. 6.1 (a) Name the type of radiation found in the section labelled P. (b) State what happens to the speed of electromagnetic radiation, in a vacuum, as the frequency of the radiation increases. [2] (c) The photograph in Fig. 6.2 shows a replacement joint in a person’s arm. Fig. 6.2 Name the part of the electromagnetic spectrum used to take this photograph. [1] (d) Another method of obtaining images of internal organs is to use sound waves of frequency above the human threshold of hearing. State the maximum frequency sound that a human can hear. Hz [1]

8 © UCLES 2005 0652/02/O/N/05 For Examiner's Use 7 (a) When ethene, C2H4, reacts with hydrogen in an addition reaction, an alkane is formed. (i) Name this alkane. [1] (ii) Draw a diagram to show the structure of this alkane. [1] (b) When ethene, C2H4, reacts with steam in an addition reaction, an alcohol is formed. (i) Name this alcohol. [1] (ii) Draw a diagram to show the structure of this alcohol. [1] (c) When ethene, C2H4, reacts with itself in an addition reaction, a polymer is formed. (i) Name this polymer. [1] (ii) Draw a diagram to show the structure of this polymer. [1]

9 © UCLES 2005 0652/02/O/N/05 [Turn over For Examiner's Use 8 (a) Describe how you would carry out an experiment to find the magnetic field pattern around a bar magnet. [4] (b) On Fig. 8.1 draw the magnetic field pattern of the bar magnet. S N Fig. 8.1 [3]

10 © UCLES 2005 0652/02/O/N/05 For Examiner's Use 9 (a) Chlorine has two isotopes, 17 35 Cl and 17 37 Cl. Complete Fig. 9.1 for these isotopes. 17 35 Cl 17 37 Cl number of protons in nucleus 17 number of neutrons in nucleus 20 arrangement of electrons in shells in the atom Fig. 9.1 [3] (b) Draw a diagram to show the covalent bonding in a molecule of hydrogen chloride, HCl [2] (c) (i) Describe the formation of each of the ions in sodium chloride, NaCl, from the elements. [2] (ii) Explain how these ions are held together in the compound. [1]

11 © UCLES 2005 0652/02/O/N/05 [Turn over For Examiner's Use (d) Explain why sodium chloride conducts electricity when liquid but not when solid. [2] (e) Describe a chemical test for the chloride ion in solution. test result [2]

12 © UCLES 2005 0652/02/O/N/05 For Examiner's Use 10 The noble gas, radon, is radioactive. Radon nuclei decay by emitting alpha-particles. (a) (i) Explain what is meant by the term noble gas. (ii) Explain what is meant by the term alpha-particle. [3] (b) Complete the equation which shows the decay of a nucleus of radon-220. Rn Po + 220 86 … … α (alpha) … … [2] (c) A sample consists of 36.0 µg of radon-220. After a period of 3 minutes only 4.5 µg of radon-220 remained. Calculate the half-life of radon-220. Show your working. half-life = minute(s) [3] 11 Carbon monoxide and oxides of nitrogen are common pollutants of air. Describe how each pollutant is formed. carbon monoxide oxides of nitrogen [4]

13 © UCLES 2005 0652/02/O/N/05 [Turn over For Examiner's Use 12 (a) (i) State the main method to obtain calcium oxide (lime) from calcium carbonate (limestone). [1] (ii) Complete the equation for this process. CaCO3 … + … [2] (iii) The energy required to break the bonds in calcium carbonate is greater than the energy released when the products are formed. What does this show about the total energy change in the reaction? [1] (iv) Describe a test to identify the gas produced in this process. test result [2] (b) Calcium hydroxide (slaked lime) is used to treat acidic industrial waste products. Name the main chemical process involved in this treatment. [1]

14 © UCLES 2005 0652/02/O/N/05 For Examiner's Use 13 Fig. 13.1 shows two types of switch that can be used to control an electric light. wall switch pull cord switch ceiling cord Fig. 13.1 (a) Explain why a pull-cord switch, not a wall switch, should always be used in a bathroom or shower-room. [3] (b) Fig. 13.2 shows part of a circuit that could be used to operate lights in a room. 240 V Fig. 13.2 The two lamps are identical and each takes a current of 0.25 A. (i) Calculate the resistance of each lamp. Show your working and include the unit. resistance = [3]

15 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 University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. © UCLES 2005 0652/02/O/N/05 For Examiner's Use (ii) What is the total current taken from the supply when both lamps are switched on? current A [1]

16 © UCLES 2005 0652/02/O/N/05 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 November 2005 question paper 0652 PHYSICAL SCIENCE 0652/02 Paper 2 maximum raw mark 80 This mark scheme is published as an aid to teachers and students, to indicate the requirements of the examination. It shows the basis on which Examiners were initially instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began. Any substantial changes to the mark scheme that arose from these discussions will be recorded in the published Report on the Examination. 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. The minimum marks in these components needed for various grades were previously published with these mark schemes, but are now instead included in the Report on the Examination for this session. • CIE will not enter into discussion or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the November 2005 question papers for most IGCSE and GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses. www.XtremePapers.com

Page 1 Mark Scheme Syllabus Paper IGCSE – November 2005 0652 2 © University of Cambridge International Examinations 2005 1 (a) (i) Convection 1 (ii) Air expands 1 becomes less dense 1 3 (b) Condensation 1 1 (c) (i) Acceleration 1 constant 1 (ii) Constant speed/velocity 1 3 Total 7 2 (a) diffusion 1 1 (b) molecules of the (coloured) gas collide 1 With molecules of air/nitrogen,/oxygen 1 2 (an answer based on densities can score 1 mark) Total 3 3 (a) mild steel: car bodies, machinery etc. 1 Stainless: cutlery, chemical plant etc. 1 2 (b) mild steel rusts (in damp air) 1 stainless does not rust 1 2 Total 4 4 (a) chemical (potential) 1 thermal 1 electrical (potential) 1 3 (b) (i) geothermal 1 (ii) non polluting/renewable etc. 1 2 (c) Mention of gravitational or strain potential energy 1 good without spurious energies such as kinetic energy +1 2 Total 7 5 (a) (i) chromatography 1 (ii) to make colourless components visible 1 2

Page 2 Mark Scheme Syllabus Paper IGCSE – November 2005 0652 2 © University of Cambridge International Examinations 2005 (b) fractional distillation (both words) 1 Bitumen is the fraction with the highest boiling point OR residue left after all others have boiled off 1 2 Total 4 6 (a) Ultra violet 1 1 (b) Remains the same 1 1 (c) X-ray 1 1 (d) 20 000 – 30 000 (Hz) 1 1 Total 4 7 (a) (i) ethane 1 (ii) correct structure shown 1 2 (b) (i) ethanol 1 (ii) correct structure shown 1 2 (c) (i) poly(e)thene 1 (ii) correct structure shown 1 2 Total 6

Page 3 Mark Scheme Syllabus Paper IGCSE – November 2005 0652 2 © University of Cambridge International Examinations 2005 8 (a) Either iron filings method OR plotting compass place magnet under paper place magnet on paper sprinkle iron filings place compass near one pole finely mark tip and move tail to mark tap paper repeat and join other good detail repeat for more lines Any four points 1+1+1+1 4 (b) Good shape and minimum of three good lines from each end 1 Minimum of five good lines from each end none touching 1 Correct field direction 1 3 Total 7 9 (a) 17 1 18 1 2,8,7 & 2,8,7 (both correct) 1 3 (b) one shared pair of electrons 1 Correct outer shells of electrons 1 2 (c) (i) transfer of one electron from Na to Cl 1 to form Na+ and Cl - 1 (accept labelled diagrams) (ii) opposite charged ions attract 1 3 (d) liquid contains ions that are free to move 1 solids contains ions that are held in a lattice 1 2 (e) TEST: add (dilute nitric acid then) aqueous silver nitrate 1 RESULT: white precipitate (both words) 1 2 Total 12

Page 4 Mark Scheme Syllabus Paper IGCSE – November 2005 0652 2 © University of Cambridge International Examinations 2005 10 (a) (i) Atom has 8 electrons in outer shell 1 (accept full outer shell) (ii) Any two of: He nucleus 2 protons and 2 neutrons fast moving/coming from nucleus 1 +1 3 (b) Top line correct (216 and 4) 1 Bottom line correct (84 and 2) 1 2 (c) Evidence of halving in equal time periods 1 Clearly 3 events 1 1 (minute) 1 3 Total 8 11 CARBON MONOXIDE: incomplete combustion (of fuels) 1 that contain carbon (compounds) 1 NITROGEN OXIDES: Combustion processes in car engines 1 emmitted through exhausts 1 4 Total 4 12 (a) (i) heat or roast (in a kiln) 1 (ii) CaO 1 CO2 1 (either order) (iii) endothermic or energy is required 1 (iv) TEST: bubble gas through lime water 1 RESULT: goes cloudy or milky 1 6 (b) neutralisation 1 1 Total 7 13 (a) Mention of water/ damp 1 Water is a conductor 1 Clear that a large current could pass through consumer 1 3 (b) (i) R = V/I or 240/0.25 1 = 960 1 ohm 1 (ii) 0.5 1 4 Total 7