Cambridge IGCSE Physical Science 0652 — 2003 Oct/Nov Paper 3 · Variant 1

This document consists of 15 printed pages and 1 blank page. SP BR (PW) S41645/3 © CIE 2003 [Turn over CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education PHYSICAL SCIENCE 0652/03 Paper 3 October/November 2003 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 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 16. 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 Total www.XtremePapers.com

2 0652/03/O/N/03 1 The soluble salts of most metals can be prepared by adding the insoluble carbonate of the metal to the appropriate acid until excess carbonate is present. (a) Name the acid which would be added to copper(II) carbonate to produce copper(II) nitrate. …[1] (b) Write a balanced equation for the reaction. …[2] (c) Describe the changes that you would observe during this reaction. … … …[2] (d) Describe how you would obtain a solid sample of the copper(II) nitrate. … … …[2] (e) Suggest why it is not possible to use a similar method to prepare the salt sodium nitrate. … …[1] For Examiner’s Use

3 0652/03/O/N/03 [Turn over 2 A student designs the apparatus of Fig. 2.1 as a device to detect thermal radiation. The flask is tightly covered with a material that absorbs thermal radiation well. Fig. 2.1 (a) (i) Describe the appearance of the material that the student should use to cover the flask and explain why it would be effective for absorbing thermal radiation. … … … … … …[3] (ii) Describe and explain what the student would see when intense thermal radiation is shone onto the apparatus. … … … … … …[2] glass tube rubber bung coloured water 100cm3 round bottom flask For Examiner’s Use

4 0652/03/O/N/03 (b) (i) Explain why the apparatus is not likely to detect low intensity thermal radiation. … … … [2] (ii) State and explain two changes that could be made in order to improve the effectiveness of this apparatus. … … … … … … … … [4] For Examiner’s Use

5 0652/03/O/N/03 [Turn over 3 The diagrams in Fig. 3.1 show the crystal structures of two forms of the element carbon. Fig. 3.1 In diamond crystals every carbon atom is linked to four other carbon atoms by covalent bonds. In graphite each carbon atom is linked to three other carbon atoms by covalent bonds to form layers. The fourth outer shell electrons in the carbon atoms then form delocalised layers of electrons. (a) Explain how these differences in the crystal structures produce differences in the following properties of the two forms (i) hardness, … … … …[2] (ii) electrical conductivity. … … … …[2] diamond graphite For Examiner’s Use

6 0652/03/O/N/03 (b) During combustion, carbon and many of its compounds combine with oxygen to form two different oxides, carbon monoxide and carbon dioxide. (i) Draw a diagram to show the formation of the bonds in carbon dioxide. You need only show the outer shell electrons in each atom. [2] (ii) State the condition needed for combustion to form carbon monoxide rather than carbon dioxide. … …[1] (iii) Explain how carbon monoxide affects the respiration of mammals. … …[1] For Examiner’s Use

7 0652/03/O/N/03 [Turn over BLANK PAGE [Question 4 can be found on page 8]

8 0652/03/O/N/03 4 A cathode-ray oscilloscope (c.r.o.) is used to investigate the circuit of Fig. 4.1. Fig. 4.1 Fig. 4.2 shows the trace on the oscilloscope screen together with the time-base and y-gain (voltage) settings when the oscilloscope is connected across AD. Fig. 4.2 (a) (i) Calculate the peak voltage (amplitude) across AD. peak voltage = … V [2] (ii) Calculate the peak current in the 10 Ωresistor. current = … [2] Voltage (y-gain): 4V/division time-base: 20ms/division A E B D C 10Ω 5Ω For Examiner’s Use

9 0652/03/O/N/03 [Turn over (iii) The primary (input) coil of the transformer has 30 turns and the secondary has 20 turns. Calculate the peak input voltage supplied to the transformer. Write down the equation that you use and show all your working. voltage supplied = …V [3] (iv) Calculate the time taken for one complete cycle of the a.c. supply. time for one cycle = … [3] (b) (i) Name the component labelled E in Fig. 4.1. …[1] (ii) On Fig. 4.3, draw the trace that would be seen if the c.r.o. were connected across BC. Fig. 4.3 [1] Voltage (y-gain): 4V/division time-base: 20ms/division For Examiner’s Use

10 0652/03/O/N/03 5 Fig. 5.1 shows an experiment to compare the rates of movement of two gases. Fig. 5.1 After a few minutes, solid ammonium chloride appears at X inside the tube. The equation for the reaction that occurs can be written as below. NH3(g)+HCl(g) →NH4Cl(s) (a) Name the process by which the two gases move along the tube. …[1] (b) Suggest and explain why the solid is formed nearer to the end where the hydrogen chloride enters the tube. … … …[2] (c) Explain this reaction in terms of proton transfer. … … …[2] (d) Describe the chemical test that you could perform to show that the solid contained ammonium ions and state the result you would expect. test … … result … … [2] X cotton wool soaked in aqueous ammonia glass tube cotton wool soaked in concentrated hydrochloric acid For Examiner’s Use

11 0652/03/O/N/03 [Turn over 6 (a) Define refractive index. … … …[2] (b) Fig. 6.1 shows a fish below the surface of water in a lake. Fig. 6.1 (i) Explain why refraction means that the fish can see through a wider range of angles than if there were no water present. … … …[2] (ii) Calculate the refractive index of the water in the lake. Write down the equation that you use and show all your working. refractive index = … [3] air water 60° 40° For Examiner’s Use

12 0652/03/O/N/03 7 Aluminium is a metallic element in Group III of the Periodic Table. Aluminium oxide is amphoteric. (a) Write the formula for aluminium oxide. …[1] (b) Explain the meaning of the term amphoteric. … … …[2] (c) State one use of aluminium and describe two properties that make it suitable for that use. use … first property… … second property … …[3] (d) Thallium is below aluminium in Group III of the Periodic Table. Suggest, with a reason, the class of oxide that you would expect thallium to form. … … …[2] For Examiner’s Use

13 0652/03/O/N/03 [Turn over 8 The apparatus of Fig. 8.1 is used to take readings from which to calculate the acceleration of free fall. Fig. 8.1 As the control box is switched on the timer starts. At the same instant the steel ball is released from rest. When the ball hits the gate this opens and stops the timer. The mass of the ball is 20.0 g. (a) Explain what causes the steel ball to be released. … … …[2] (b) Calculate the weight of the ball in newton. [g = 10 N/kg] weight = … N [2] timer and control box 1.2m electromagnet steel ball mechanical gate For Examiner’s Use

14 0652/03/O/N/03 (c) Explain whether air resistance is likely to affect the motion of the ball as it falls. … … …[2] (d) The time measured for the ball to fall a distance of 1.2 m is 0.48 s. Calculate a value for the acceleration of free fall (g), using these values. Show your working. g = … [4] For Examiner’s Use

15 0652/03/O/N/03 9 One method of preparing ethanol is the fermentation of glucose. The equation for this process can be summarised as shown below. C6H12O6 →2C2H5OH+2CO2 (a) State the three essential conditions for fermentation to take place. … … …[3] (b) (i) Calculate the relative molecular mass, Mr, of glucose and of ethanol. [Ar:H, 1; C, 12; O, 16.] [2] Mr, of glucose … Mr, of ethanol … (ii) Hence find the mass of ethanol that could be obtained from 36 g of glucose. mass of ethanol = … [2] (iii) Calculate the volume of carbon dioxide at room temperature and pressure, r.t.p., produced by fermentation of 36 g of glucose. 1 mole of any gas occupies 24 dm3 at r.t.p. volume of carbon dioxide = … [2] For Examiner’s Use

16 0652/03/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