0620 w10 qp_12
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The document contains a chemistry exam with 40 multiple choice questions covering topics such as the periodic table, chemical bonding, acids and bases, redox reactions and organic chemistry. Students are provided with a periodic table and instructed to choose the single best answer for each question, recording their responses on an answer sheet. The exam is designed to test students' understanding of fundamental chemistry concepts.
0620 w10 qp_12
- 1. w w ap eP m e tr .X w om .c s er UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education 0620/12 CHEMISTRY Paper 1 Multiple Choice October/November 2010 45 Minutes Additional Materials: *7210437430* Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you. There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 16. You may use a calculator. This document consists of 16 printed pages. IB10 11_0620_12/FP © UCLES 2010 [Turn over
- 2. 2 1 In which changes do the particles move further apart? W X liquid gas Y A 2 W and X B solid Z W and Z C D X and Y Y and Z A mixture of ethanol and methanol are separated by fractional distillation. This method of separation depends on a difference in property X of these two alcohols. What is property X? A B colour C melting point D 3 boiling point solubility Chromatography is used to find out if a banned dye, P, is present in foodstuffs. The results are shown in the diagram. Which foodstuff contains P? P 4 A B C D Which diagram does not show the outer shell electrons in the molecule correctly? A B C D H H H H Cl H C H © UCLES 2010 0620/12/O/N/10 H Cl Cl
- 3. 3 5 The chemical compositions of two substances, W and X, are given. W Na(Al Si3)O8 X Ca(Al 2Si2)O8 Which statements are correct? 1 2 6 W contains three times as much silicon as X. 3 A W and X contain the same amount of oxygen. X contains twice as much aluminium as W. B 1 and 2 C 1 and 3 D 2 and 3 1, 2 and 3 D X3Y The electronic structures of atoms X and Y are shown. X Y X and Y form a covalent compound. What is its formula? A 7 B XY5 C XY3 XY Element X is shiny and can be formed into a sheet by hammering. Which row correctly describes the properties of element X? conducts electricity melts below 25 °C A B C D © UCLES 2010 0620/12/O/N/10 [Turn over
- 4. 4 8 Two isotopes of hydrogen are 1H and 2 H . 1 1 Which diagram shows the arrangement of particles in the two isotopes? 1 1H e e n A 2 1H p key e = an electron p = a proton n = a neutron e e p e p C p n e B = a nucleus e p p e p n D 9 p n The table shows the structure of different atoms and ions. particle proton number nucleon number number of protons number of neutrons number of electrons Mg 12 24 12 W 12 Mg2+ X 24 12 12 10 F 9 19 9 Y 9 F– 9 19 9 10 Z What are the values of W, X, Y and Z? W X Y Z A 10 10 9 9 B 10 12 10 9 C 12 10 9 10 D 12 12 10 10 © UCLES 2010 0620/12/O/N/10
- 5. 5 10 Element X has a nucleon (mass) number of 19 and a proton (atomic) number of 9. To which group in the Periodic Table does it belong? A I B III C D VII 0 11 Substance X was electrolysed in an electrolytic cell. A coloured gas was formed at the anode and a metal was formed at the cathode. power supply cathode anode substance X What is substance X? A aqueous sodium chloride B molten lead bromide C molten zinc oxide D solid sodium chloride © UCLES 2010 0620/12/O/N/10 [Turn over
- 6. 6 12 The diagram shows apparatus used in an attempt to electroplate a metal ring with copper. + – bulb metal ring copper electrode aqueous copper(II) sulfate (electrolyte) The experiment did not work. What change is needed in the experiment to make it work? A Add solid copper(II) sulfate to the electrolyte. B Increase the temperature of the electrolyte. C Replace the copper electrode by a carbon electrode. D Reverse the connections to the battery. 13 When concentrated sodium chloride solution is electrolysed, elements X and Y are formed. X Y concentrated sodium chloride solution – + What are X and Y? X Y A chlorine hydrogen B hydrogen chlorine C hydrogen oxygen D oxygen hydrogen © UCLES 2010 0620/12/O/N/10
- 7. 7 14 Calcium carbonate was reacted with hydrochloric acid in a conical flask. The flask was placed on a balance and the mass of the flask and contents was recorded as the reaction proceeded. During the reaction, carbon dioxide gas was given off. The reaction was carried out at two different temperatures. Which row is correct? change in mass temperature at which mass changed more quickly A decrease higher temperature B decrease lower temperature C increase higher temperature D increase lower temperature 15 Some barium iodide is dissolved in water. Aqueous lead(II) nitrate is added to the solution until no more precipitate forms. This precipitate, X, is filtered off. Dilute sulfuric acid is added to the filtrate and another precipitate, Y, forms. What are the colours of precipitates X and Y? X Y A white white B white yellow C yellow white D yellow yellow © UCLES 2010 0620/12/O/N/10 [Turn over
- 8. 8 16 When pink crystals of cobalt(II) chloride are heated, steam is given off and the colour of the solid changes to blue. CoCl2.6H2O CoCl2 + 6H2O What happens when water is added to the blue solid? colour temperature A changes to pink decreases B changes to pink increases C remains blue decreases D remains blue increases 17 The diagrams show some pieces of laboratory equipment. 1 balance 2 stop-clock 3 thermometer 60 45 15 30 Which equipment is needed to find out whether dissolving salt in water is an endothermic process? A 1 only B 1 and 3 C 2 and 3 18 Which reaction will result in a decrease in pH? A adding calcium hydroxide to acid soil B adding citric acid to sodium hydrogen carbonate solution C adding sodium chloride to silver nitrate solution D adding sodium hydroxide to hydrochloric acid 19 Which is an endothermic process? A burning hydrogen B distilling petroleum C reacting potassium with water D using petrol in a motor car engine © UCLES 2010 0620/12/O/N/10 D 3 only
- 9. 9 20 The red colour in some pottery glazes may be formed as a result of the reactions shown. heat CuCO3 CuO + CO2 CuO + SnO Cu + SnO2 These equations show that ……1…… is oxidised and ……2…… is reduced. Which substances correctly complete gaps 1 and 2 in the above sentence? 1 2 A CO2 SnO2 B CuCO3 CuO C CuO SnO D SnO CuO 21 The table shows some reactions of the halogens. Which reaction is the most likely to be explosive? reaction chlorine gas bromine gas iodine gas reaction with hydrogen A B C very vigorous less vigorous D reaction with iron 22 Which compound is likely to be coloured? A KMnO4 B KNO3 C K2CO3 D K2SO4 23 A salt is made by adding an excess of an insoluble metal oxide to an acid. How can the excess metal oxide be removed? A chromatography B crystallisation C distillation D filtration © UCLES 2010 0620/12/O/N/10 [Turn over
- 10. 10 24 The oxide of element X was added to an acid. It reacted to form a salt and water. oxide of element X acid What is the pH of the acid before the reaction and what type of element is X? pH type of element X A greater than 7 metal B greater than 7 non-metal C less than 7 metal D less than 7 non-metal 25 The table compares the properties of Group I elements with those of transition elements. Which entry in the table is correct? property Group I elements transition elements A catalytic activity low high B density high low C electrical conductivity low high D melting point high low © UCLES 2010 0620/12/O/N/10
- 11. 11 26 The diagram shows the positions of elements P, Q, R, S and T in the Periodic Table. These letters are not the chemical symbols for the elements. S T P Q R Which statement about the properties of these elements is correct? A P reacts more vigorously with water than does Q. B P, Q and R are all metals. C T exists as diatomic molecules. D T is more reactive than S. 27 Some metals react readily with dilute hydrochloric acid. Some metals can be extracted by heating their oxides with carbon. For which metal are both statements correct? A calcium B copper C iron D magnesium © UCLES 2010 0620/12/O/N/10 [Turn over
- 12. 12 28 Which diagram could represent the structure of an alloy? A B – + – + + – + – – + – + C D 29 The diagram shows the materials used in the production of steel from impure iron. impure iron oxygen steel an oxide of element X What could element X be? A calcium B carbon C nitrogen D sulfur 30 Which property do all metals have? A Their boiling points are low. B Their densities are low. C They conduct electricity. D They react with water. © UCLES 2010 0620/12/O/N/10
- 13. 13 31 Which pollutant, found in car exhaust fumes, does not come from the fuel? A carbon monoxide B hydrocarbons C lead compounds D nitrogen oxides 32 Which diagram shows a common use of stainless steel? A B C D 33 Why is chlorination used in water treatment? A to kill bacteria in the water B to make the water neutral C to make the water taste better D to remove any salt in the water 34 A test-tube containing damp iron wool is inverted in water. After three days, the water level inside the test-tube has risen. damp iron wool water Which statement explains this rise? A Iron oxide has been formed. B Iron wool has been reduced. C Oxygen has been formed. D The temperature of the water has risen. © UCLES 2010 0620/12/O/N/10 [Turn over
- 14. 14 35 Which information about carbon dioxide and methane is correct? carbon dioxide methane A formed when vegetation decomposes B greenhouse gas C present in unpolluted air D produced during respiration 36 A bag of fertiliser ‘Watch it grow’ contains ammonium sulfate and potassium sulfate. Which of the three elements N, P and K does ‘Watch it grow’ contain? N P K A B C D 37 In an oil refinery, crude oil is separated into useful fractions. The diagram shows some of these fractions. refinery gases gasolene X pre-heat diesel 400 °C Y Z What are fractions X, Y and Z? X Y Z A fuel oil bitumen paraffin (kerosene) B fuel oil paraffin (kerosene) bitumen C paraffin (kerosene) bitumen fuel oil D paraffin (kerosene) fuel oil bitumen © UCLES 2010 0620/12/O/N/10
- 15. 15 38 Ethene reacts with Y to produce ethanol. ethene + Y → ethanol What is Y? A hydrogen B oxygen C steam D yeast 39 The diagram shows the structure of a compound. H H H H C C C C H H H O H To which classes of compound does this molecule belong? alkane alkene alcohol A no no no B no yes yes C yes no yes D yes yes yes 40 Which structures show compounds that are members of the same homologous series? 1 2 H C O H C C H H H H H H C H O C C H H H H 3 H 1 and 2 © UCLES 2010 H C C C C H A H 4 H H O H H H B 1 and 4 H C 2 and 3 0620/12/O/N/10 H H C C C C H H H H H H D 3 and 4 O H
- 16. © UCLES 2010 24 40 Sodium Calcium 88 0620/12/O/N/10 Key b X a b = proton (atomic) number X = atomic symbol a = relative atomic mass *58-71 Lanthanoid series 90-103 Actinoid series Actinium Ac 89 Ra 88 Radium Fr Francium 87 * Hafnium 72 Lanthanum 57 Hf La 40 Zirconium Zr 91 Titanium 178 Yttrium 22 48 Ti 139 39 Y 89 Scandium 21 227 Barium Caesium 56 Cs 45 Sc 226 55 137 Ba 133 Strontium Rubidium 38 Rb 37 Sr 85 20 Potassium 19 Ca 39 Magnesium Na 12 Mg 23 Beryllium 4 Lithium K 11 3 9 Be 7 II Li I 93 Ta 181 Niobium Nb 90 58 73 52 96 Mo W 184 141 Pa Thorium 55 Tc 186 Re 144 Nd 92 60 Uranium U 238 Neodymium 75 Rhenium 43 Technetium 25 Manganese Mn 29 30 65 8 9 VII 2 0 Ru 101 Iron 190 Pm Osmium Os Np 93 Neptunium 61 Promethium 76 44 Ruthenium 26 56 Fe Sm 150 Iridium Pu 94 Plutonium 62 Eu 152 Platinum Am 95 Americium 63 Europium 78 195 Pt 192 46 Palladium Pd 106 Nickel Ni Ir Samarium 77 45 Rhodium Rh 103 Cobalt Co Gd 157 Gold Au 197 Silver 96 64 Curium Cm Gadolinium 79 47 Ag 108 Copper Cu 201 Bk Terbium Tb 159 Mercury Hg 97 Berkelium 65 80 48 Cadmium Cd 112 Zinc Zn 11 70 Dy 162 Thallium Tl 204 Indium Cf 98 Californium 66 Es Holmium Ho 165 Lead Pb 207 Tin 99 Einsteinium 67 82 50 119 Sn In 32 Germanium Ge 73 Silicon 115 Gallium Ga Dysprosium 81 49 31 13 Aluminium Si Al 14 28 Carbon 27 Boron 12 C 14 75 Sb 122 Arsenic As Bi 209 Fermium Fm Erbium Er 167 Bismuth 100 68 83 51 Antimony 33 15 Phosphorus P 31 Nitrogen N Se 79 Sulfur S 32 Oxygen Po 169 Md Thulium Tm 101 Mendelevium 69 84 Polonium 52 Tellurium Te 128 Selenium 34 16 16 O Yb 173 Astatine At Iodine I 127 Bromine Br 80 Chlorine No 102 Nobelium 70 Ytterbium 85 53 35 17 Cl 35.5 Fluorine F 19 Lr Lutetium Lu 175 Radon Rn Xenon Xe 131 Krypton Kr 84 Argon Ar 40 Neon 103 Lawrencium 71 86 54 36 18 10 Ne 20 Helium Hydrogen B 4 28 64 7 VI He 27 59 6 V H 59 5 IV The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.). 91 Protactinium Th 232 Praseodymium Cerium 59 Pr Ce 74 Tungsten 42 Molybdenum 24 Chromium Cr 140 Tantalum 41 23 Vanadium V 51 1 III 1 Group DATA SHEET The Periodic Table of the Elements 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.