Cambridge IGCSE Physical Science 0652 — 2016 Oct/Nov Paper 2 · Variant 2

This document consists of 19 printed pages and 1 blank page. DC (ST/SG) 135973 © UCLES 2016 [Turn over Cambridge International Examinations Cambridge International General Certificate of Secondary Education * 9 0 2 0 5 5 9 8 4 1 * PHYSICAL SCIENCE 0652/22 Paper 2 (Core) October/November 2016 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 an HB pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. Electronic calculators may be used. You may lose marks if you do not show your working or if you do not use appropriate units. A copy of the Periodic Table is printed on page 20. 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.

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3 0652/22/O/N/16 © UCLES 2016 [Turn over 1 The graph in Fig. 1.1 shows the variation in the speed of a car on a test run. 20 10 0 0 10 20 30 40 speed m / s time / s A B C D Fig. 1.1 (a) State the section of the graph which shows the car moving at constant speed, … with decreasing speed. …[2] (b) On the graph, draw a small cross (X) at the point where the speed of the car is zero. [1] (c) Determine the distance travelled by the car in the last 5 s. Show your working. distance = …m [3] (d) The acceleration of free fall near the Earth’s surface is a constant 9.8 m / s2. (i) Explain what is meant by the term acceleration. … …[1] (ii) Explain what is meant by the term a constant 9.8 m / s 2. … … …[2]

4 0652/22/O/N/16 © UCLES 2016 2 Table 2.1 gives information about the first four members of the homologous series of alcohols. Table 2.1 alcohol molecular formula boiling point / °C methanol CH3OH 65 ethanol C2H5OH 78 propanol C3H7OH 97 butanol … 117 (a) (i) State the difference between the formulae of methanol and ethanol. … …[1] (ii) Give one other characteristic of an homologous series. …[1] (iii) Butanol is the fourth member of the alcohol series. Suggest the molecular formula for butanol. …[1] (b) Draw the structural formula of ethanol. [1]

5 0652/22/O/N/16 © UCLES 2016 [Turn over (c) Fig. 2.1 shows apparatus used for the fractional distillation of a mixture of water, ethanol and butanol. –10 0 10 20 30 40 50 60 70 80 90 100 110 °C thermometer water out water in X water, ethanol and butanol liquid collected heat Fig. 2.1 (i) Name the piece of apparatus labelled X in the diagram. …[1] (ii) Apparatus X has an outer tube and an inner tube. There is a flow of cold water in the space between the outer and inner tube. State why this cold water flow is needed. … … [1] (iii) Name the liquid collected first in this distillation. Give a reason for your answer. name of liquid … reason … …[2] (iv) State what happens to the reading on the thermometer when all of the first liquid has been collected. …[1]

6 0652/22/O/N/16 © UCLES 2016 3 A student finds the centre of mass of a thin sheet of aluminium. She suspends the aluminium from a fixed rod. She attaches a plumbline to the rod at point A, as shown in Fig. 3.1. There is another small hole through the sheet at point B. A B rod plumbline aluminium sheet Fig. 3.1 (a) On Fig. 3.1, draw a small cross to show a possible position of the centre of mass of the aluminium sheet. [1] (b) The aluminium sheet is rotated about the rod in a clockwise direction, as shown in Fig. 3.2, and held in this position. A B rotation Fig. 3.2

7 0652/22/O/N/16 © UCLES 2016 [Turn over Describe what will happen when the aluminium sheet is released. Give a reason for your answer. description … … reason … …[2] (c) Outline what else the student needs to do to find the exact position of the centre of mass of the aluminium sheet. … … … …[3]

8 0652/22/O/N/16 © UCLES 2016 4 Fig. 4.1 shows apparatus used to react magnesium with steam. magnesium steam heat water hydrogen Fig. 4.1 (a) The equation for the reaction of magnesium with steam is shown. Mg + H2O MgO + H2 Write a word equation for this reaction. …[1] (b) This reaction is exothermic. (i) State what is meant by the term exothermic. … …[1] (ii) Suggest why the magnesium needs to be heated before it will react with the steam. … … [1] (c) Describe how you could show that the gas collected is hydrogen. … … …[2]

9 0652/22/O/N/16 © UCLES 2016 [Turn over (d) State what you would observe when copper is used instead of magnesium in this experiment. Give a reason for your answer. observation with copper … … reason … …[2]

10 0652/22/O/N/16 © UCLES 2016 5 Fig. 5.1 shows a side view of a ripple tank. Some circular waves are moving across the surface of the water. water sloping side ripple tank Fig. 5.1 The ripple tank has sloping sides. The depth of water decreases towards the edges of the tank. Fig. 5.2 shows a view from above of the circular waves spreading out from the middle of the ripple tank shown in Fig. 5.1. wavefronts Fig. 5.2 Two of the wavefronts of the waves are labelled. (a) On Fig. 5.2, use a double-headed arrow (↔) to mark one wavelength of the waves. [1]

11 0652/22/O/N/16 © UCLES 2016 [Turn over (b) Use words from the list to complete the sentences. amplitude energy frequency hertz metres reflection refraction wavelength Each word may be used once, more than once or not at all. The maximum height of a water wave above the normal water level is called the … of the wave. The number of water waves passing any point each second is called the … of the waves. This is measured in … . Water waves slow down when they reach shallower water. This is an example of … . [4] (c) Fig. 5.3 shows straight wavefronts, viewed from above, moving towards a barrier in a flat-bottomed ripple tank. direction of movement of the waves wavefront barrier Fig. 5.3 Complete Fig. 5.3 by drawing in three wavefronts to show how they appear after they hit the barrier. [3]

12 0652/22/O/N/16 © UCLES 2016 6 (a) Metals conduct electricity. (i) State two other properties of metals. 1 . … 2 …[2] (ii) Name two other substances or types of substances which are good conductors of electricity. 1 . … 2 …[2] (b) Brass is an alloy of zinc and another metal. (i) Name this other metal. …[1] (ii) Suggest one physical property of brass which is different from that of zinc. …[1] (c) Zinc reacts with sulfuric acid to make hydrogen and a salt. (i) State the name of this salt. …[1] (ii) Write a symbol equation for the burning of hydrogen in air to form water. …[2]

13 0652/22/O/N/16 © UCLES 2016 [Turn over 7 A circuit contains a battery, three resistors in series and an ammeter. Fig. 7.1 shows the circuit diagram. A 10.5 Ω 7.50 Ω R 9.00 V Fig. 7.1 The e.m.f. of the battery is 9.00 V and the reading on the ammeter is 0.400 A. (a) (i) State the current through resistor R. current = …A [1] (ii) Show that the total resistance in the circuit is 22.5 Ω. [2] (iii) Calculate the resistance of resistor R. Show your working. resistance = …Ω [2]

14 0652/22/O/N/16 © UCLES 2016 (b) Fig. 7.2 shows a circuit diagram with the same battery connected across two resistors in parallel. 18 Ω 6.0 Ω 9.00 V Fig. 7.2 The current through the 18 Ω resistor is 0.5 A and the current through the 6.0 Ω resistor is 1.5 A. (i) Circle the number below which gives the current through the battery. 0.33 A 0.75 A 1.5 A 2.0 A [1] (ii) Circle the number below which gives the combined resistance of the two resistors in parallel. 4.5 Ω 6.0 Ω 12 Ω 18 Ω [1]

15 0652/22/O/N/16 © UCLES 2016 [Turn over 8 (a) Sodium chloride is an ionic compound. (i) Complete Table 8.1. Table 8.1 element number of electrons in an atom formula of an ion number of electrons in an ion sodium 11 … … chlorine … Cl – 18 [3] (ii) Explain why ions of sodium and chlorine are stable. … …[1] (iii) Name the element with 18 electrons in each atom. …[1]

16 0652/22/O/N/16 © UCLES 2016 (b) Fig. 8.1 shows the arrangement of electrons in one molecule of hydrogen. The hydrogen atoms are joined by a covalent bond. H x• H Fig. 8.1 (i) Fig. 8.2 is a partly completed diagram to show the electrons in an ammonia (NH3) molecule. Each ammonia molecule has 3 covalent bonds. Complete Fig. 8.2 by adding hydrogen atoms (H) and dots (•) to indicate the arrangement of the electrons in the bonds in the molecule. xx x N x x Fig. 8.2 [2] (ii) Complete this equation. N2 + … H2 … NH3 [1] (c) State the percentage of clean air that is nitrogen. …% [1]

17 0652/22/O/N/16 © UCLES 2016 [Turn over 9 Fig. 9.1 shows an electromagnetic door lock. door coil rod A spring switch S wall bolt B Fig. 9.1 Rod A is made of iron and is attached to the door. Bolt B is made from steel and is attached to the spring. The switch is open and the door is locked. (a) When switch S is closed, the door unlocks. Explain why the door unlocks by describing what happens in the coil, to rod A and to bolt B when switch S is closed. in the coil … … to rod A … … to bolt B … …[3] (b) (i) Describe the magnetic property of iron which makes it more suitable than steel for rod A. … …[1] (ii) Suggest why the spring is needed in the door lock. … …[1]

18 0652/22/O/N/16 © UCLES 2016 10 Fig. 10.1 shows three test-tubes containing solutions of sodium halide salts. Each solution is colourless. P sodium fluoride solution Q sodium bromide solution R sodium iodide solution Fig. 10.1 An aqueous solution of chlorine is added to each test-tube. Table 10.1 shows some of the results. Table 10.1 test-tube P Q R action of chlorine solution … turns yellow turns brown (a) Name the products of the reactions which produce the colours in test-tubes Q and R. test-tube Q … test-tube R …[2] (b) Explain how the reactivity of chlorine compares with the reactivities of fluorine, iodine and bromine. … … … …[2] (c) Complete Table 10.1 to suggest what is observed in test-tube P when chlorine solution is added. [1] (d) State why fluorine, chlorine, bromine and iodine are members of Group VII of the Periodic Table and have similar chemical properties. … …[1]

19 0652/22/O/N/16 © UCLES 2016 11 111 47Ag is a radioactive isotope of silver. (a) (i) State the number of protons in the nucleus of this isotope. … [1] (ii) Calculate the number of neutrons in the nucleus of this isotope. … [1] (b) This isotope decays by β-decay. (i) Complete the equation to show this decay. 111 47 Ag … … Z + 0 –1 β [2] (ii) Use the Periodic Table on page 20 to identify the element Z. …[1]

20 0652/22/O/N/16 © UCLES 2016 Group The Periodic Table of Elements 1 H hydrogen 1 2 He helium 4 I II III IV V VI VII VIII 3 Li lithium 7 4 Be beryllium 9 atomic number atomic symbol Key name relative atomic mass 11 Na sodium 23 12 Mg magnesium 24 19 K potassium 39 20 Ca calcium 40 37 Rb rubidium 85 38 Sr strontium 88 55 Cs caesium 133 56 Ba barium 137 87 Fr francium – 88 Ra radium – 5 B boron 11 13 Al aluminium 27 31 Ga gallium 70 49 In indium 115 81 Tl thallium 204 6 C carbon 12 14 Si silicon 28 32 Ge germanium 73 50 Sn tin 119 82 Pb lead 207 22 Ti titanium 48 40 Zr zirconium 91 72 Hf hafnium 178 104 Rf rutherfordium – 23 V vanadium 51 41 Nb niobium 93 73 Ta tantalum 181 105 Db dubnium – 24 Cr chromium 52 42 Mo molybdenum 96 74 W tungsten 184 106 Sg seaborgium – 25 Mn manganese 55 43 Tc technetium – 75 Re rhenium 186 107 Bh bohrium – 26 Fe iron 56 44 Ru ruthenium 101 76 Os osmium 190 108 Hs hassium – 27 Co cobalt 59 45 Rh rhodium 103 77 Ir iridium 192 109 Mt meitnerium – 28 Ni nickel 59 46 Pd palladium 106 78 Pt platinum 195 110 Ds darmstadtium – 29 Cu copper 64 47 Ag silver 108 79 Au gold 197 111 Rg roentgenium – 30 Zn zinc 65 48 Cd cadmium 112 80 Hg mercury 201 112 Cn copernicium – 114 Fl flerovium – 116 Lv livermorium – 7 N nitrogen 14 15 P phosphorus 31 33 As arsenic 75 51 Sb antimony 122 83 Bi bismuth 209 8 O oxygen 16 16 S sulfur 32 34 Se selenium 79 52 Te tellurium 128 84 Po polonium – 9 F fluorine 19 17 Cl chlorine 35.5 35 Br bromine 80 53 I iodine 127 85 At astatine – 10 Ne neon 20 18 Ar argon 40 36 Kr krypton 84 54 Xe xenon 131 86 Rn radon – 21 Sc scandium 45 39 Y yttrium 89 57–71 lanthanoids 89–103 actinoids 57 La lanthanum 139 89 Ac lanthanoids actinoids The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.) actinium – 58 Ce cerium 140 90 Th thorium 232 59 Pr praseodymium 141 91 Pa protactinium 231 60 Nd neodymium 144 92 U uranium 238 61 Pm promethium – 93 Np neptunium – 62 Sm samarium 150 94 Pu plutonium – 63 Eu europium 152 95 Am americium – 64 Gd gadolinium 157 96 Cm curium – 65 Tb terbium 159 97 Bk berkelium – 66 Dy dysprosium 163 98 Cf californium – 67 Ho holmium 165 99 Es einsteinium – 68 Er erbium 167 100 Fm fermium – 69 Tm thulium 169 101 Md mendelevium – 70 Yb ytterbium 173 102 No nobelium – 71 Lu lutetium 175 103 Lr lawrencium – To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cie.org.uk after the live examination series.

® IGCSE is the registered trademark of Cambridge International Examinations. This document consists of 7 printed pages. © UCLES 2016 [Turn over Cambridge International Examinations Cambridge International General Certificate of Secondary Education PHYSICAL SCIENCE 0652/22 Paper 2 Core Theory October/November 2016 MARK SCHEME Maximum Mark: 80 Published 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 should be read in conjunction with the question paper and the Principal Examiner Report for Teachers. Cambridge will not enter into discussions about these mark schemes. Cambridge is publishing the mark schemes for the October/November 2016 series for most Cambridge IGCSE®, Cambridge International A and AS Level components and some Cambridge O Level components.

Page 2 Mark Scheme Syllabus Paper Cambridge IGCSE – October/November 2016 0652 22 © UCLES 2016 Question Answer Marks 1(a) BC ; CD ; 2 1(b) D ; 1 1(c) evidence that s = area under the graph (accept use of vt for this mark) ; attempt to measure triangle ; = 40 + / – 2.5 (m / s) ; 3 1(d)(i) change (per unit time) in the speed ; 1 1(d)(ii) steady change / change in speed of 9.8 m / s ; each second ; 2 Question Answer Marks 2(a)(i) CH2 / one carbon and 2 hydrogen atoms ; 1 2(a)(ii) same general formula / same functional group / gradation of or similar physical properties ; 1 2(a)(iii) C4H9OH ; 1 2(b) H H | | H — C — C —OH ; | | H H 1

Page 3 Mark Scheme Syllabus Paper Cambridge IGCSE – October/November 2016 0652 22 © UCLES 2016 Question Answer Marks 2(c)(i) condenser ; 1 2(c)(ii) cool vapour / liquid / remove energy released as vapour condenses ; 1 2(c)(iii) ethanol ; lowest boiling point ; 1 2(c)(v) goes up / increases / OWTTE ; 1 Question Answer Marks 3(a) A small cross centred on the plumbline ; 1 3(b) sheet swings back to its original position ; the weight provides a restoring moment / force ; 2 3(c) Suspend the plate (and plumbline) from the second hole ; mark the position of the plumbline (this mark can be awarded in either in 1st or 2nd hanging) ; centre of mass is at the intersection of the two lines ; 3 Question Answer Marks 4(a) magnesium + water / steam → magnesium oxide + hydrogen ; 1 4(b)(i) reaction which gives out (heat) energy ; 1 4(b)(ii) energy needed to break bonds / mention of activation energy / energy needed to start the reaction ; 1 4(c) light / burning splint / flame ; pops / popping sound / explodes ; (Use of a glowing splint gets no marks) 2

Page 4 Mark Scheme Syllabus Paper Cambridge IGCSE – October/November 2016 0652 22 © UCLES 2016 Question Answer Marks 4(d) no reaction / no change / nothing ; copper is unreactive / less reactive than magnesium or hydrogen / low in reactivity series / OWTTE ; 2 Question Answer Marks 5(a) Wavelength correctly marked ; 1 5(b) amplitude ; frequency ; hertz ; refraction ; 4 5(c) At least 1 wave clearly reflected towards the left and upwards ; angle of incidence = angle of reflection ; 3 (or more) wavefronts drawn and wavelength constant = to incident wavelength ; 3 Question Answer Marks 6(a)(i) any two from – malleable or ductile ; conduct heat ; 2 6(a)(ii) Any two from – solution of a salt ; molten salt ; graphite ; semiconductor ; (accept electrolyte for 1 mark as an alternative to solution of a salt or a molten salt) max 2

Page 5 Mark Scheme Syllabus Paper Cambridge IGCSE – October/November 2016 0652 22 © UCLES 2016 Question Answer Marks 6(b)(i) copper ; 1 6(b)(ii) colour / melting point / boiling point / density / hardness / expansivity ; 1 6(c)(i) zinc sulfate ; 1 6(c)(ii) 2H2 + O2 → 2H2O ;; 2 Question Answer Marks 7(a)(i) 0.4 (A) ; 1 7(a)(ii) Use of V = I R ; → Rtotal = 9 / 0.4 = 22.5 (Ω) ; 2 7(a)(iii) Indication that the other two resistor values are added (10.5 + 7.5) ; → R = 4.5 (Ω) ; 2 7(b)(i) 2 A circled ; 1 7(b)(ii) 4.5 Ω circled ; 1 Question Answer Marks 8(a)(i) Na+ ; 10 ; 17 ; 3 8(a)(ii) Full outer shell / 8 electrons in outer shell / noble gas structure ; 1 8(a)(iii) argon ; 1

Page 6 Mark Scheme Syllabus Paper Cambridge IGCSE – October/November 2016 0652 22 © UCLES 2016 Question Answer Marks 8(b)(i) 3 hydrogen atoms ; lone pair between nitrogen and each hydrogen ; 2 8(b)(ii) 3 before H2 AND 2 before NH3 ; 1 8(c) 78 OR 79 ; 1 Question Answer Marks 9(a) There is a current ; the iron rod is magnetised ; steel bar is attracted to the iron rod / moves towards the iron rod / the spring is compressed ; 3 9(b)(i) iron is easily (magnetised and) demagnetised / temporary magnet ; 1 9(b)(ii) to push rod B back into the wall ; 1 Question Answer Marks 10(a) bromine formed / bromine displaced ; iodine formed / iodine displaced ; 2 10(b) chlorine is less reactive than fluorine ; chlorine is more reactive than bromine and iodine ; 2 10(c) no reaction / no change / nothing / remains colourless ; 1 10(d) have 7 electrons in their outer shell ; 1

Page 7 Mark Scheme Syllabus Paper Cambridge IGCSE – October/November 2016 0652 22 © UCLES 2016 Question Answer Marks 11(a)(i) 47 ; 1 11(a)(ii) 64 ; 1 11(b)(i) top line: 111 ; bottom line: 48 ; 2 11(b)(ii) cadmium / Cd ; 1