UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level

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1 * * UNIVERSITY OF MRIGE INTERNTIONL EXMINTIONS General ertificate of Education Ordinary Level EMISTRY 5070/11 Paper 1 Multiple hoice May/June 2011 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or is recommended) 1 hour RE TESE INSTRUTIONS 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 13 printed pages and 3 blank pages. I11 06_5070_11/RP ULES 2011 [Turn over

2 2 1 opper(ii) sulfate crystals are separated from sand using the four processes listed below. In which order are these processes used? 1st 2nd 3rd 4th filtering dissolving crystallising evaporating filtering dissolving evaporating crystallising dissolving evaporating filtering crystallising dissolving filtering evaporating crystallising 2 drop of liquid bromine is placed in the bottom of a gas jar. rown fumes of bromine vapour slowly spread through the covered gas jar. Why does this happen? romine vapour is less dense than air. romine molecules and the molecules in air are always moving around. romine molecules are smaller than the molecules in air. romine molecules move faster than the molecules in air. 3 The diagrams show an experiment with aqueous ammonium chloride. poured in moist litmus paper solution X aqueous ammonium chloride mixture heat gas, Y, is produced and the litmus paper changes colour. What are solution X and gas Y? solution X gas Y aqueous sodium hydroxide ammonia aqueous sodium hydroxide chlorine dilute sulfuric acid ammonia dilute sulfuric acid chlorine ULES /11/M/J/11

3 4 What is the mass of oxygen contained in 72 g of pure water? [Relative atomic masses: = 1; O = 16] 16 g 32 g 64 g 70 g 3 5 student tested a solution by adding aqueous sodium hydroxide. precipitate was not seen because the reagent was added too quickly. What could not have been present in the solution? l 3+ a 2+ N 4 + Zn 2+ 6 Which molecule has the largest number of electrons involved in covalent bonds? 2 4 O 2 3 O N 2 7 In which of the following is there a lattice of positive ions in a sea of electrons? liquid potassium chloride sand solid graphite solid magnesium 8 Which statement about both chlorine atoms and chloride ions is correct? They are chemically identical. They are isotopes of chlorine. They have the same number of protons. They have the same physical properties. 9 Element X has the electronic structure 2,8,5. Element Y has the electronic structure 2,8,7. What is the likely formula of a compound containing only X and Y? XY 3 X 2 Y 3 X 3 Y X 3 Y 2 10 covalent bond is formed by electron sharing between metals and non-metals. electron sharing between non-metals. electron transfer between non-metals. electron transfer from metals to non-metals. ULES /11/M/J/11 [Turn over

4 11 The equation for the reaction between calcium carbonate and hydrochloric acid is shown. 4 ao 3 (s) + 2l (aq) al 2(aq) + 2 O(l) + O 2 (g) ow many moles of calcium carbonate will give 24 cm 3 of carbon dioxide when reacted with an excess of the acid? (ssume one mole of carbon dioxide occupies 24 dm 3.) 1 mol 0.1 mol 0.01 mol mol 12 The empirical formula of a liquid compound is 2 4 O. To find the empirical formula, it is necessary to know the density of the compound. percentage composition of the compound. relative molecular mass of the compound. volume occupied by 1 mole of the compound. 13 The diagram shows the electrolysis of molten lead(ii) bromide using inert electrodes. + brown gas silvery metal molten lead(ii) bromide What happens during this electrolysis? heat toms change to ions. ovalent bonds are broken. Ions change to atoms. New compounds are formed. ULES /11/M/J/11

5 5 14 Which pair of metals X and Y will produce the highest voltage when used as electrodes in a simple cell? V metal X in a solution of a salt of X metal Y in a solution of a salt of Y porous membrane metal X metal Y copper silver magnesium silver magnesium zinc zinc copper 15 The energy profile diagram for the reaction between hydrogen and chlorine is shown. 2 + l 2 energy reactants 2l products reaction pathway What information about this reaction does the diagram show? type of reaction sign of enthalpy change, endothermic negative endothermic positive exothermic negative exothermic positive ULES /11/M/J/11 [Turn over

6 6 16 The following changes could be made to the conditions in the reaction between zinc and hydrochloric acid. 1 increase in concentration of the acid 2 increase in particle size of the zinc 3 increase in pressure on the system 4 increase in temperature of the system Which pair of changes will increase the rate of reaction? 1 and 2 1 and 4 2 and 3 3 and 4 17 The equation shows what happens in a redox reaction between iron(ii) chloride and chlorine gas. 2Fel 2 + l 2 2Fel 3 Which equation describes the reduction process in this reaction? 2l l 2 + 2e l 2 + 2e 2l Fe 2+ Fe 3+ + e Fe 3+ + e Fe Which acid and base react together to produce an insoluble salt? hydrochloric acid and sodium hydroxide nitric acid and calcium oxide sulfuric acid and barium hydroxide sulfuric acid and zinc oxide ULES /11/M/J/11

7 7 19 solution of fertiliser was tested as shown. add excess aqueous sodium hydroxide solution moist red litmus paper turns blue fertiliser solution green precipitate forms warm the mixture Which ions must be present in the fertiliser? Fe 2+ 2 and SO 4 Fe 3+ and NO 3 N + 4 and Fe 2+ N + 4 and NO 3 20 arbon and silicon are both in Group IV of the Periodic Table. Which statement is correct for both carbon dioxide and silicon dioxide? They are acidic oxides. They are readily soluble in water. They contain ionic bonds. They have giant molecular structures. 21 Which calcium compound does not increase the p of acidic soils? calcium carbonate calcium hydroxide calcium oxide calcium sulfate ULES /11/M/J/11 [Turn over

8 22 Which deduction about the element astatine, t, can be made from its position in Group VII? 8 It forms covalent compounds with sodium. It is a gas. It is displaced from aqueous potassium astatide, Kt, by chlorine. It is more reactive than iodine. 23 Which pair of properties are both correct for a typical transition element? property 1 property 2 forms coloured compounds soluble in water high density has variable oxidation states low density high melting point low melting point can act as a catalyst 24 The diagram represents the manufacture of sulfuric acid by the ontact process. sulfur sulfur dioxide sulfur trioxide R sulfuric acid What is used in step R? concentrated sulfuric acid followed by water vanadium(v) oxide water followed by concentrated sulfuric acid water only 25 What happens when zinc foil is placed in an aqueous solution of copper(ii) sulfate? opper(ii) ions are oxidised. There is no reaction. Zinc atoms are oxidised. Zinc sulfate is precipitated. ULES /11/M/J/11

9 9 26 In the apparatus shown, gas P is passed over solid Q. Q P No reaction occurs if P and Q are heat P Q hydrogen lead(ii) oxide hydrogen magnesium oxide oxygen carbon oxygen sulfur 27 Which element can only be extracted from its ore using electrolysis? calcium copper lead silver 28 Scrap iron is often recycled. Which reason for recycling is not correct? It reduces the amount of pollution at the site of the ore extraction. It reduces the amount of waste taken to landfill sites. It reduces the need to collect the scrap iron. It saves natural resources. 29 Which diagram represents the structure of an alloy? ULES /11/M/J/11 [Turn over

10 10 30 luminium is higher than copper in the reactivity series so the following displacement reaction should be feasible. 2l (s) + 3uSO 4 (aq) l 2(SO 4 ) 3 (aq) + 3u(s) The reaction does not take place at room temperature. What is the reason for this? luminium has an inert coating all over it. The compound aluminium sulfate does not exist. The reaction is exothermic. The reaction needs to be warmed to take place. 31 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. 32 When a volcano erupts, which gas is produced in significant amounts? carbon monoxide chlorofluorocarbons methane sulfur dioxide 33 ompound X is a hydrocarbon. It reacts with steam to form an alcohol. Which type of compound is X and what would be its effect on bromine water? type of compound effect on bromine water alkane turns from brown to colourless alkane turns from colourless to brown alkene turns from brown to colourless alkene turns from colourless to brown ULES /11/M/J/11

11 34 Useful fractions are obtained by the fractional distillation of petroleum. Which fraction is matched by its use? 11 fraction use bitumen fuel in cars lubricating oils for making waxes and polishes paraffin (kerosene) for making roads petrol (gasolene) aircraft fuel 35 Which statement about ethanoic acid is correct? It contains three carbon atoms per molecule. It contains five hydrogen atoms per molecule. It is insoluble in water. It reacts with ethanol to form a sweet-smelling compound. 36 Which bond is present in both nylon and Terylene? O = O N N 37 ompounds X and Y are both alkanes. ompound X has a higher boiling point than compound Y. What could be the formulae of compounds X and Y? compound X compound Y ULES /11/M/J/11 [Turn over

12 12 ULES /11/M/J/11 38 Four hydrocarbon structures are shown Which hydrocarbons are isomers of each other? 1, 2 and 3 1, 2 and 4 1 and 2 only 3 and 4 39 With which substance will ethene react to form more than one product? bromine hydrogen oxygen steam 40 When a compound X is reacted with sodium carbonate, carbon dioxide gas is evolved. What could be the formula of compound X? 2 5 O O 2 3 O O

13 13 LNK PGE ULES /11/M/J/11

14 14 LNK PGE ULES /11/M/J/11

15 15 LNK PGE ULES /11/M/J/11

16 16 T SEE T The Periodic T able of the Element s Group I II III IV V VI VII e ydrogen elium Li e N O F Ne Lithium eryllium oron arbon Nitrogen Oxygen Fluorine Neon Na Mg l Si P S l r Sodium Magnesium luminium Silicon Phosphorus Sulfur hlorine rgon K a Sc T i V r Mn Fe o Ni u Zn Ga Ge s Se r Kr Potassium alcium Scandium T itaniu m V anadiu m hromium Manganese Iron obalt Nickel opper Zinc Gallium Germanium rsenic Selenium romine Krypton Rb Sr Y Zr Nb Mo T c Ru Rh Pd g d In Sn Sb T e Rubidium Strontium Yttrium Zirconium Niobium Molybdenum T echnetiu m Ruthenium Rhodium Palladium Silver admium Indium T i n ntimony T elluriu m Iodine Xenon I 131 Xe s a La f T a W Re Os Ir Pt u g T l Pb i Po t Rn aesium arium Lanthanum afnium T antalu m T ungste n Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead ismuth Polonium statine Radon * Fr Ra c Francium Radium ctinium * Lanthanoid series 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 T erbiu m 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 103 The volume of one mole of any gas is 2 4 dm 3 at room temperature and pressure ( r.t.p.). 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. 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. ULES /11/M/J/11