UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level

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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 27 1 hour dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or is recommended) 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. This document consists of 14 printed pages and 2 blank pages. I7 6_57_1/2RP ULES 27 [Turn over

2 1 Which property of a gas affects the rate at which it spreads throughout a laboratory? 2 boiling point molecular mass reactivity solubility in water 2 mixture of two substances is spotted on to a piece of chromatography paper. The paper is inserted into a beaker containing a liquid. chromatography paper spot of mixture beaker liquid For separation of the substances to occur the mixture must be placed so that the spot is just below the level of the liquid. be soluble in the liquid. contain substances of the same R f values. contain substances that are coloured. 3 Which pair of substances are both mixtures? air; water limewater; water sea-water; air sea-water; ethanol ULES 27 57/1/M/J/7

3 3 4 The diagram shows a simple laboratory apparatus for the preparation and collection of a dry gas. anhydrous calcium chloride What is the gas? carbon dioxide chlorine hydrogen hydrogen chloride 5 Gas X What is gas X? has no effect either on damp red litmus paper or on damp blue litmus paper, puts out both a glowing splint and a burning splint. ammonia carbon dioxide chlorine nitrogen ULES 27 57/1/M/J/7 [Turn over

4 4 6 What is the structure of the ion Sr +? protons neutrons electrons In which substance is each carbon atom covalently bonded to only three other atoms? carbon dioxide diamond graphite methane 8 In which pair of substances does each have a giant molecular structure? diamond, iodine diamond, silica (sand) iodine, methane methane, silica (sand) 9 ow does a magnesium atom form a bond with an oxygen atom? by giving one pair of electrons to the oxygen atom by sharing one pair of electrons, both electrons provided by the magnesium atom by sharing two pairs of electrons, both pairs provided by the oxygen atom by sharing two pairs of electrons, each atom donating one pair of electrons 1 Metals have positive ions in a sea of electrons. Which metal atom provides most electrons for the sea? aluminium calcium magnesium sodium ULES 27 57/1/M/J/7

5 5 11 The element X forms a gaseous molecule X 2. ne volume of X 2 combines with one volume of hydrogen to form two volumes of a gaseous hydride. What is the formula for the hydride of X? X X 2 2 X 2 X 2 12 Which substance has the highest percentage by mass of nitrogen? N 4 N 3 M r = 8 (N 4 ) 2 S 4 M r = 132 (N 2 ) 2 M r = 6 (N 4 ) 3 P 4 M r = The diagram shows the electrolysis of aqueous copper(ii) sulphate using copper electrodes. copper anode (positive) copper cathode (negative) copper(ii) sulphate solution Which graph shows how the mass of the cathode changes during electrolysis? mass mass mass mass time time time time ULES 27 57/1/M/J/7 [Turn over

6 6 14 The energy diagram for the reaction between sodium hydroxide and hydrochloric acid is shown. + (aq) + (aq) energy = 54 kj / mol 2 (l) What can be deduced from the diagram? progress of reaction eat is needed to start the reaction. The products contain less energy than the reactants. The reaction is rapid. The ions have more energy than the + ions. 15 student adds marble chips to hydrochloric acid. marble chips hydrochloric acid balance The mass of flask and contents is measured at regular time intervals. Which graph shows the result? mass mass mass mass time time time time 16 In which change is the nitrogen reduced? N 3 to N N 3 to N 3 N 2 to N 3 N 3 to N 2 ULES 27 57/1/M/J/7

7 7 17 The equation shows the reaction for the formation of sulphur trioxide. 2S 2 (g) + 2 (g) 2S 3 (g) = 197 kj Which change in reaction conditions would produce more sulphur trioxide? adding more catalyst decreasing the pressure increasing the temperature removing some sulphur trioxide 18 Which salt can be prepared by an acid-alkali titration method? ammonium sulphate copper(ii) sulphate iron(ii) sulphate zinc sulphate 19 The table shows properties of four chlorides. Which is magnesium chloride? colour solubility in water method of preparation green soluble metal and acid white insoluble precipitation white soluble metal and acid green insoluble precipitation 2 Why is ethanoic acid described as a weak acid? It is only slightly ionised in water. It is a poor conductor of electricity. It is an organic acid. It reacts only with very reactive metals. 21 Which pair of substances produce a precipitate when their aqueous solutions are mixed? barium nitrate, silver nitrate sodium chloride, barium nitrate sodium nitrate, barium chloride sodium sulphate, barium chloride ULES 27 57/1/M/J/7 [Turn over

8 22 mmonia may be obtained from ammonium chloride by heating with 8 aqueous calcium chloride. aqueous sodium hydroxide. dilute hydrochloric acid. water. 23 The diagram represents the manufacture of sulphuric acid by the ontact process. sulphur sulphur dioxide sulphur trioxide R sulphuric acid What is used in step R? vanadium(v) oxide water only water followed by concentrated sulphuric acid concentrated sulphuric acid followed by water 24 Rubidium, Rb, is an element in Group I of the Periodic Table. Which statement about rubidium is correct? It reacts slowly with water. It forms an insoluble hydroxide. It is liberated at the cathode during the electrolysis of an aqueous solution of its chloride. It forms a sulphate, Rb 2 S The element sulphur, S, is in Group VI of the Periodic Table. Which formula is incorrect? S 2 S 2 3 S 2 4 S 3 ULES 27 57/1/M/J/7

9 26 The table shows some of the properties of four elements. Which element is most likely to be a transition metal? 9 melting point density g / cm 3 electrical conductivity poor good good good 27 Which equation represents the reaction of calcium with cold water? a + 2 a + 2 2a a + 2 a a() a a() ry hydrogen gas is passed over a powdered solid and then through a cooled U-tube before the excess of hydrogen is burned in air. dry hydrogen powdered solid heat excess hydrogen burning in air ice colourless liquid colourless liquid collects in the U-tube. What could the powdered solid be? calcium oxide copper(ii) oxide magnesium zinc oxide ULES 27 57/1/M/J/7 [Turn over

10 1 29 coil of clean copper wire is suspended in aqueous silver nitrate. rystals of silver are deposited on the copper wire. Which statement is not correct? The copper is oxidised. The total mass of the crystals of silver increases gradually. The total number of positive ions in the solution is unchanged. The solution turns blue. 3 Zinc and aluminium both react with dilute hydrochloric acid. Why does zinc react more quickly than aluminium? luminium is lower than hydrogen in the reactivity series. luminium has an oxide coating. Zinc is an amphoteric element. Zinc is a transition metal. 31 Which metal is used in the sacrificial protection of iron pipes? copper lead magnesium sodium 32 Some metals can be obtained by the reduction of their oxides with hydrogen. Which line of the table is correct? aluminium copper silver sodium key = can be obtained = cannot be obtained ULES 27 57/1/M/J/7

11 11 33 The table shows pollutants which cause eutrophication, sources of these pollutants and a problem that eutrophication causes. Which entry in the table is correct? pollutant source problem nitrates detergents oxygen depletion nitrates fertilisers excess oxygen phosphates detergents oxygen depletion phosphates fertilisers excess oxygen 34 Which gas burns in air to form a single product? ammonia carbon monoxide hydrogen chloride methane 35 Which pair of statements about the combustion of a carbohydrate and its formation by photosynthesis is not correct? combustion photosynthesis reaction exothermic reaction endothermic oxygen used up oxygen set free no catalyst needed catalyst needed chemical energy converted to heat energy chemical energy converted to light energy ULES 27 57/1/M/J/7 [Turn over

12 36 Which of the following has not been prepared by reacting a carboxylic acid with an alcohol? 12 n 37 Which compound is obtained by the oxidation of ethanol, 2 5? Which statement applies to all three of the compounds ethane, ethene and ethanol? ne molecule of each compound contains the same number of carbon atoms. ne mole of each compound contains the same number of hydrogen atoms. They all occur in crude oil. They are all liquids at room temperature. 39 What is the empirical formula of ethanoic acid? ULES 27 57/1/M/J/7

13 13 4 Poly(ethene) can be manufactured by the process below. decane ethene poly(ethene) cracking polymerisation Which diagram shows the change in molecular size during this process? molecular size molecular size start finish start finish molecular size molecular size start finish start finish ULES 27 57/1/M/J/7

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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/7

16 16 T SEET The Periodic Table of the Elements Group I II III IV V VI VII 1 4 e ydrogen elium Li e N F Ne Lithium eryllium oron arbon Nitrogen xygen Fluorine Neon Na Mg l Si P S l r Sodium Magnesium luminium Silicon Phosphorus Sulphur hlorine rgon K a Sc Ti V r Mn Fe o Ni u Zn Ga Ge s Se r Kr Potassium alcium Scandium Titanium Vanadium hromium Manganese Iron obalt Nickel opper Zinc Gallium Germanium rsenic Selenium romine Krypton Rb Sr Y Zr Nb Mo Tc Ru Rh Pd g d In Sn Sb Te Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver admium Indium Tin ntimony Tellurium Iodine Xenon I 131 Xe s a La f Ta W Re s Ir Pt u g Tl Pb i Po t Rn aesium arium Lanthanum afnium Tantalum Tungsten Rhenium smium Iridium Platinum Gold Mercury Thallium Lead ismuth Polonium statine Radon * Fr Ra c Francium Radium ctinium *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 59 Pa Protactinium Nd Neodymium 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 ambridge ssessment Group. ambridge ssessment is the brand name of University of ambridge Local Examinations Syndicate (ULES), which is itself a department of the University of ambridge. 57/1/M/J/7