UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY. Paper 1 Multiple Choice May/June 2006

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1 UNIVERSITY F MRIGE INTERNTINL EXMINTINS General ertificate of Education rdinary Level EMISTRY 57/1 Paper 1 Multiple hoice May/June 26 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or is recommended) 1 hour RE TESE INSTRUTINS FIRST Write in soft pencil. o not use staples, paper clips, highlighters, glue or correction fluid. Write your name, entre number and candidate number on the nswer Sheet in the spaces provided unless this has been done for you. There are forty questions on this paper. nswer all questions. For each question there are four possible answers,, and. hoose the one you consider correct and record your choice in soft pencil on the separate nswer Sheet. Read the instructions on the nswer Sheet very carefully. Each correct answer will score one mark. mark will not be deducted for a wrong answer. ny rough working should be done in this booklet. copy of the Periodic Table is printed on page 16. I6 6_57_1/3RP ULES 26 This document consists of 15 printed pages and 1 blank page. [Turn over

2 2 1 The table gives data about four substances. Which substance has particles in a disorderly arrangement at room temperature? melting point / o boiling point / o Which gas has the slowest rate of diffusion? ammonia, N 3 methane, 4 oxygen, 2 nitrogen, N 2 3 n excess of calcium hydroxide is added to an acidic soil. What happens to the p of the soil? change in p final p increase 7 increase 1 decrease 7 decrease 5 4 Which test could be used to show that a sample of water is pure? It freezes at exactly o. It turns anhydrous copper(ii) sulphate blue. It turns cobalt(ii) chloride paper pink. When it evaporates, it leaves no residue. ULES 26 57/1/M/J/6

3 3 5 ydrogen can form both + ions and ions. Which statement about these two ions is correct? n + ion has no electrons in its first shell. n + ion has more protons than an ion. n ion has one more electron than an + ion. n ion is formed when a hydrogen atom loses an electron. 6 Which graph shows the number of electrons in the outer shell of an atom, plotted against the proton (atomic) number for the first ten elements in the Periodic Table? number of electrons in outer shell 6 4 number of electrons in outer shell proton number proton number number of electrons in outer shell 6 4 number of electrons in outer shell proton number proton number 7 The symbols and electronic structures for some elements are shown below. silicon, Si (2,8,4) oxygen, (2,6) hydrogen, (1) fluorine, F (2,7) nitrogen, N (2,5) Which formula is correct for a compound containing silicon? Si 4 F Si 4 SiN 5 Si 2 ULES 26 57/1/M/J/6 [Turn over

4 4 8 Substance X conducts electricity when in the solid state. X reacts with hydrochloric acid. Which substance could X be? copper(ii) oxide silicon(iv) oxide sodium chloride zinc 9 Rubidium is in Group I and bromine is in Group VII of the Periodic Table. ow is a compound formed between rubidium and bromine? Each atom of bromine shares an electron with an atom of rubidium. Each atom of bromine shares a pair of electrons with an atom of rubidium. Each atom of bromine gives an electron to an atom of rubidium. Each atom of bromine receives an electron from an atom of rubidium. 1 2 dm 3 of aqueous sodium hydroxide of concentration 5 mol / dm 3 were required for an experiment. ow many moles of sodium hydroxide were needed to make up this solution? n 8 g sample of oxygen atoms contains the same number of atoms as 16 g of element X. What is the relative atomic mass, r, of X? ULES 26 57/1/M/J/6

5 12 The apparatus shown below was set up to copper plate the metal spoon. 5 + copper foil spoon copper(ii) sulphate solution The experiment did not work. What was the mistake in the apparatus? variable resistor should be included in the electrical circuit. ilute sulphuric acid should be used as the electrolyte. The copper electrode should all be in the solution. The spoon should be the negative electrode. 13 Which pair of substances act as reducing agents in the blast furnace? carbon and oxygen carbon monoxide and carbon dioxide carbon and carbon monoxide carbon dioxide and oxygen ULES 26 57/1/M/J/6 [Turn over

6 6 14 Two cells were set up as shown in the diagram. The arrows show the direction of electron flow in the external circuits. metal X metal Y metal Y metal Z dilute sulphuric acid Which set of metals would give the electron flows in the directions shown? metal X metal Y metal Z g u Zn g Zn u u Zn g Zn u g 15 The equation below shows an exothermic reaction. Mg(s) + 2l(aq) Mgl 2(aq) + 2 (g) Which statement about this exothermic reaction is not correct? Magnesium chloride is soluble in water. Magnesium is above hydrogen in the reactivity series. ne mole of magnesium produces one mole of hydrogen gas. The total energy of the products is greater than that of the reactants. ULES 26 57/1/M/J/6

7 16 The diagram shows the energy profile for a chemical reaction. 7 products energy E reactants What is the correct description of the reaction? progress of reaction sign of overall energy change sign of E exothermic + endothermic + + endothermic + exothermic + 17 In the ontact process for making sulphuric acid, one step involves the oxidation of sulphur dioxide as shown below. 2S 2 (g) + 2 (g) 2S 3 (g) The forward reaction is exothermic. Which change would increase the amount of sulphur trioxide produced at equilibrium? increasing the temperature decreasing the temperature decreasing the pressure adding a catalyst 18 Which statement about conduction of electricity is correct? Electricity is conducted in aqueous solution by electrons. Electricity is conducted in a metal wire by ions. Electricity is conducted in a molten electrolyte by electrons. Electricity is conducted in an acid solution by ions. ULES 26 57/1/M/J/6 [Turn over

8 8 19 Which change is an example of oxidation? chloride ions to chlorine atoms copper(ii) ions to copper atoms iron(iii) ions to iron(ii) ions oxygen atoms to oxide ions 2 Which cation, on reaction with aqueous sodium hydroxide, forms a precipitate that dissolves in excess sodium hydroxide? a 2+ u 2+ Fe 3+ Zn Which of the following is a reaction of dilute sodium hydroxide? It reacts with ammonium chloride to produce ammonia. It reacts with calcium carbonate to produce carbon dioxide. It reacts with copper(ii) oxide to produce water. It reacts with Universal Indicator solution turning it red. 22 The equation for one method of making copper carbonate is shown below. The reaction is an example of us 4 + Na 2 3 u 3 + Na 2 S 4 neutralisation. oxidation and reduction. precipitation. synthesis. 23 lump of element X can be cut by a knife. uring its reaction with water X floats and melts. What is X? calcium copper magnesium potassium ULES 26 57/1/M/J/6

9 24 Which deduction about the element astatine, t, can be made from its position in Group VII? 9 It forms covalent compounds with sodium. It is displaced from aqueous potassium astatide, Kt, by chlorine. It is a gas. It is more reactive than iodine. 25 Which atom has the same electronic configuration as the strontium ion? calcium krypton rubidium selenium 26 Rubidium is in Group I of the Periodic Table. What are properties of rubidium chloride? formula approximate melting point / o solubility in water Rbl 7 insoluble Rbl 7 soluble Rbl 2 7 soluble Rbl 2 7 insoluble 27 Iron pipes corrode rapidly when exposed to sea water. Which metal, when attached to the iron, would not offer protection against corrosion? aluminium copper magnesium zinc 28 Metal carbonates decompose when heated. Which carbonate is most stable to heat? calcium carbonate copper(ii) carbonate lead(ii) carbonate zinc carbonate ULES 26 57/1/M/J/6 [Turn over

10 1 29 The apparatus shown was set up with 1 cm 3 volume of air in the tube. The volume of gas in the tube was measured at intervals for six days. moist iron filings air graduated tube water Which graph best represents how the volume of gas changes with time? 1 volume of gas / cm volume of gas / cm time / days time / days 1 volume of gas / cm volume of gas / cm time / days time / days ULES 26 57/1/M/J/6

11 11 3 From your knowledge of the manufacture of both aluminium and iron, what is the order of chemical reactivity of aluminium, carbon and iron towards oxygen? most reactive least reactive aluminium carbon iron aluminium iron carbon carbon aluminium iron carbon iron aluminium 31 The molar heat of combustion, i.e. the heat given out when one mole of the alcohol is completely burned in oxygen, of a number of alcohols is given below. alcohol formula heat of combustion kj / mol methanol 3 75 ethanol propanol butanol ow many carbon and hydrogen atoms would there be in an alcohol that has a molar heat of combustion of 39 kj / mol? number of carbon atoms number of hydrogen atoms ULES 26 57/1/M/J/6 [Turn over

12 32 The diagram shows processes that take place in the manufacture of ammonia. 12 substance W substance X cracking fractional distillation hydrogen nitrogen catalyst Y ammonia What are substances W and X and catalyst Y? W X Y air oil iron air oil vanadium(v) oxide oil air iron oil air vanadium(v) oxide 33 Element R reacts with oxygen to form a gas, T. T changes the colour of damp litmus paper from blue to red. T is used to kill bacteria in the preservation of dried fruit. What is R? carbon chlorine nitrogen sulphur 34 The gases coming from a car s exhaust contain oxides of nitrogen. ow are these oxides formed? Nitrogen reacts with carbon dioxide. Nitrogen reacts with carbon monoxide. Nitrogen reacts with oxygen. Nitrogen reacts with petrol. ULES 26 57/1/M/J/6

13 13 35 The table shows pollutants and their possible effects. Which line is not correct? pollutant effect Fs cause destruction of the ozone layer 4 forms photochemical smog is poisonous to humans N 2 forms acid rain 36 student investigated the reaction of different vegetable oils with hydrogen. 1 cm 3 of hydrogen was passed through 1 g samples of vegetable oils containing a suitable catalyst. The volume of hydrogen remaining after each reaction was recorded. vegetable oil volume of hydrogen remaining / cm 3 P 1 Q 87 R 63 S Which vegetable oils are unsaturated? P only Q and R only Q, R and S only S only 37 In the polymerisation of ethene to form poly(ethene), which of the following does not change? boiling point density empirical formula molecular mass ULES 26 57/1/M/J/6 [Turn over

14 14 ULES 26 57/1/M/J/6 38 In which pair of macromolecules are the linkages the same? fats and proteins nylon and fats nylon and proteins proteins and Terylene 39 The structures of four organic compounds are shown Which compounds decolourise bromine water? 1 and 2 2 and 4 3 only 3 and 4 4 Which polymer would hydrolyse to amino acids? N N N N N N N N

15 15 LNK PGE 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 (ULES) 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. 57/1/M/J/6

16 16 T SEET The Periodic Table of the Elements Group I II III IV V VI VII 1 1 ydrogen 2 4 e elium 3 7 Li Lithium 4 9 e eryllium 5 11 oron 6 12 arbon 7 14 N Nitrogen 8 16 xygen 9 19 F Fluorine 1 2 Ne Neon Na Sodium Mg Magnesium l luminium Si Silicon P Phosphorus S Sulphur l hlorine 18 4 r rgon K Potassium 2 4 a alcium Sc Scandium Ti Titanium V Vanadium r hromium Mn Manganese Fe Iron o obalt Ni Nickel u opper 3 65 Zn Zinc 31 7 Ga Gallium Ge Germanium s rsenic Se Selenium 35 8 r romine Kr Krypton Rb Rubidium Sr Strontium Y Yttrium 4 91 Zr Zirconium Nb Niobium 96 Mo Molybdenum Tc Technetium Ru Ruthenium Rh Rhodium Pd Palladium g Silver d admium In Indium Sn Tin Sb ntimony Te Tellurium I Iodine Xe Xenon s aesium Fr Francium a arium 226 Ra Radium 139 La Lanthanum 57 * c ctinium f afnium Ta Tantalum W Tungsten Re Rhenium s smium Ir Iridium Pt Platinum u Gold 8 21 g Mercury Tl Thallium Pb Lead i ismuth 84 Po Polonium 85 t statine 86 Rn Radon *58-71 Lanthanoid series 9-13 ctinoid series Key b a X a = relative atomic mass X = atomic symbol b = proton (atomic) number e erium 232 Th Thorium 141 Pr Praseodymium Pa Protactinium Nd Neodymium 238 U Uranium Pm Promethium Np Neptunium Sm Samarium Pu Plutonium Eu Europium m mericium Gd Gadolinium m urium Tb Terbium k erkelium y ysprosium f alifornium o olmium Es Einsteinium Er Erbium Fm Fermium Tm Thulium Md Mendelevium Yb Ytterbium No Nobelium Lu Lutetium Lr Lawrencium 13 The volume of one mole of any gas is 24 dm 3 at room temperature and pressure (r.t.p.). University of ambridge International Examinations is part of the University of ambridge Local Examinations Syndicate (ULES), which is itself a department of the University of ambridge. 57/1/M/J/6