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 57/11 Paper 1 Multiple hoice May/June 21 dditional Materials: RE TESE INSTRUTINS FIRST Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or is recommended) 1 hour 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 16 printed pages. I1 6_57_11/3RP ULES 21 [Turn over

2 2 1 Which is an anion that is present in the solution formed when an excess of dilute hydrochloric acid is added to calcium carbonate? a 2+ l What correctly describes the molecules in very dilute sugar solution at room temperature? sugar molecules water molecules close together, moving at random close together, moving at random widely separated, moving at random close together, moving at random widely separated, moving at random close together, not moving widely separated, not moving widely separated, moving at random 3 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 ULES 21 57/11/M/J/1

3 3 4 mixture containing equal volumes of two liquids that mix completely but do not react together is placed in the apparatus shown and heated until the thermometer first shows a steady reading. t which position will there be the highest proportion of the liquid with the higher boiling point? thermometer water out cold water in heat ULES 21 57/11/M/J/1 [Turn over

4 4 5 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 6 Which pair of elements, when combined together, do not form a covalent compound? caesium and fluorine nitrogen and chlorine phosphorus and fluorine sulfur and chlorine ULES 21 57/11/M/J/1

5 5 7 The diagram shows the structure of a covalent compound containing the element hydrogen,, and the unknown elements X, Y and Z. Y X X Y Z To which groups of the Periodic Table do these three elements, X, Y and Z, belong? X Y Z metal consists of a lattice of positive ions in a sea of electrons. What changes, if any, take place to the electrons and positive ions in a metal wire when an electric current is passed through it? electrons positive ions replaced by new electrons replaced by new ions replaced by new electrons unchanged unchanged replaced by new ions unchanged unchanged 9 What is the mass of one mole of carbon-12?.12 g.24 g 1 g 12 g 1 Two different hydrocarbons each contain the same percentage by mass of hydrogen. It follows that they have the same empirical formula. number of isomers. relative molecular mass. structural formula. ULES 21 57/11/M/J/1 [Turn over

6 6 11 The diagram shows the electrolysis of a concentrated aqueous solution containing both copper(ii) ions and sodium ions. solution Which metal is deposited at the negative electrode and why? metal deposited reason copper copper is less reactive than sodium copper copper is more reactive than hydrogen sodium copper is less reactive than hydrogen sodium copper is more reactive than sodium 12 The diagram shows the apparatus used to electrolyse lead(ii) bromide using inert electrodes. lamp lead(ii) bromide Why does the lamp light up only when the lead(ii) bromide is melted? romine atoms in the lead(ii) bromide are converted to ions when it is melted. Electrons flow through the lead(ii) bromide when it is melted. The ions in lead(ii) bromide are free to move only when the solid is melted. There are no ions in solid lead(ii) bromide. ULES 21 57/11/M/J/1

7 7 13 student performs two reactions. reaction 1 reaction 2 1 g of magnesium ribbon with excess 2. mol / dm 3 dilute hydrochloric acid 5 g of magnesium powder with excess 2. mol / dm 3 dilute hydrochloric acid In both experiments, the volume of hydrogen produced, V, is measured against time, t, and the results plotted graphically. Which set of graphs is correct? V reaction 2 V reaction 1 reaction 1 reaction 2 t t V reaction 1 V reaction 1 reaction 2 reaction 2 t t 14 Which statement about catalysts is correct for a typical equilibrium reaction? catalyst can be either an inorganic or an organic species. catalyst does not take part in the reaction. catalyst only speeds up the forward reaction. catalyst provides the energy required to start a reaction. 15 When a solution containing silver ions is added to a solution containing iron(ii) ions, an equilibrium is set up. g + (aq) + Fe 2+ (aq) g(s) + Fe 3+ (aq) The addition of which substance would not affect the amount of silver precipitated? g + (aq) Fe 2+ (aq) Fe 3+ (aq) 2 (l) ULES 21 57/11/M/J/1 [Turn over

8 16 Which reaction does not involve either oxidation or reduction? 8 4 (g) (g) 2 (g) (g) u 2+ (aq) + Zn(s) u(s) + Zn 2+ (aq) u(s) + 2 S 4 (aq) us 4 (aq) + 2 (l) Zn(s) + 2 S 4 (aq) ZnS 4 (aq) + 2 (g) 17 Which pair of compounds could be used in the preparation of calcium sulfate? calcium carbonate and sodium sulfate calcium chloride and ammonium sulfate calcium hydroxide and barium sulfate calcium nitrate and lead(ii) sulfate 18 metal reacts with dilute hydrochloric acid to produce a gas. What is used to identify this gas? a glowing splint a lighted splint damp blue litmus paper limewater 19 Titration of an acid against a base is a method often used in the preparation of salts. Which properties of the acid, the base and the salt are required if this method is to be used? acid base salt insoluble insoluble insoluble soluble insoluble insoluble soluble soluble insoluble soluble soluble soluble ULES 21 57/11/M/J/1

9 2 The diagram shows part of the Periodic Table. 9 Q T P R S Which pair of letters represents elements that are in the same period? P and R P and S Q and T R and S 21 Which row shows the correct number of protons and electrons in the ion of an element in Group II of the Periodic Table? number of protons number of electrons The oxide of an element X increases the rate of decomposition of hydrogen peroxide. t the end of the reaction the oxide of X is unchanged. Which details are those of X? proton number mass number ULES 21 57/11/M/J/1 [Turn over

10 1 23 Which element is sodium? melting point in electrical conduction density in g / cm good good poor good Which substances react together to give hydrogen? calcium oxide and water copper and dilute sulfuric acid copper and steam magnesium and steam 25 In the extraction of iron, carbon monoxide acts as a catalyst. an inert gas. an oxidising agent. a reducing agent. 26 n alloy of copper and zinc is added to an excess of dilute hydrochloric acid. Which observations are correct? residue filtrate grey blue solution none blue solution none colourless solution red-brown colourless solution ULES 21 57/11/M/J/1

11 11 27 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 28 Which compound will not produce ammonia when heated with ammonium sulfate? calcium oxide magnesium oxide sodium hydroxide sulfuric acid 29 These reactions are used in the manufacture of sulfuric acid. P S + 2 S 2 Q 2S S 3 R S S 4 Which reactions are speeded up by using a catalyst? P only Q only R only Q and R 3 Why is carbon used in the purification of drinking water? It desalinates the water. It disinfects the water. It filters out solids. It removes tastes and odours from the water. 31 Which gas burns in air to form only one product? ammonia carbon monoxide hydrogen chloride methane ULES 21 57/11/M/J/1 [Turn over

12 12 32 The diagram shows apparatus for measuring the volume of hydrogen given off when an excess of dilute hydrochloric acid is added to powdered metal. The volume of gas is measured at room temperature and pressure. dilute hydrochloric acid tap graduated tube metallic powder water The experiment is carried out three times, using the same mass of powder each time but with different powders: pure magnesium pure zinc a mixture of magnesium and zinc Which powder gives the greatest volume of hydrogen and which the least volume? greatest volume of 2 least volume of 2 magnesium zinc magnesium the mixture zinc magnesium zinc the mixture 33 The list shows three chemical reactions. 1 combustion of ethanol 2 fermentation of glucose 3 reaction of ethanol with ethanoic acid to give an ester In which reactions is water a product? 1 and 2 only 1 and 3 only 2 and 3 only 1, 2 and 3 ULES 21 57/11/M/J/1

13 13 34 The diagram shows a reaction scheme. acidified potassium ethene + steam catalyst compound X dichromate(vi) compound Y compound X compound Z What is the final compound, Z? a carboxylic acid an alcohol an alkene an ester 35 ow does the number of carbon, hydrogen and oxygen atoms in an ester differ from the total number of carbon, hydrogen and oxygen atoms in the alcohol and carboxylic acid from which the compound was derived? carbon atoms hydrogen atoms oxygen atoms less less less less same less same less less same same same 36 The two statements are about the fractional distillation of crude oil. The statements may or may not be correct. They may or may not be linked. statement 1 Fractional distillation is used to separate crude oil into useful fractions. statement 2 The fractions with lower boiling points are found at the top of the fractionating column. What is correct about these two statements? oth statements are correct and statement 2 explains statement 1. oth statements are correct but statement 2 does not explain statement 1. Statement 1 is correct but statement 2 is incorrect. Statement 1 is incorrect but statement 2 is correct. ULES 21 57/11/M/J/1 [Turn over

14 14 37 n aqueous solution of a compound of formula reacts with sodium carbonate, liberating carbon dioxide. What is the structural formula of the compound? 38 When butanol, represented by 4 w, burns in air, carbon dioxide and water are formed. 4 w + x y 2 Which values of w, x and y balance the equation? w x y Which substances will burn in air and give carbon dioxide amongst the combustion products? 1 calcium carbonate 2 ethane 3 ethanol 4 methanol 1 and 2 only 2 and 3 only 1, 2 and 3 only 2, 3 and 4 only ULES 21 57/11/M/J/1

15 15 4 The macromolecules of proteins, fats and carbohydrates can all be broken down into their simple units by a similar process. What is the process called? esterification hydrolysis oxidation reduction ULES 21 57/11/M/J/1

16 16 T SEE T The Periodic T able of the Element s Group I II III IV V VI VII 1 1 ydrogen 2 4 e elium 3 7 Li Lithium 4 9 e eryllium 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 Sulfur l hlorine 18 4 r rgon K Potassium 2 4 a alcium Sc Scandium T i T itaniu m V V anadiu m 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 T c T echnetiu m Ru Ruthenium Rh Rhodium Pd Palladium g Silver d admium In Indium Sn T i n Sb ntimony T e T elluriu m I Iodine Xe Xenon s aesium Fr Francium a arium 226 Ra Radium 139 La Lanthanum 57 * c ctinium f afnium T a T antalu m W T ungste n Re Rhenium s smium Ir Iridium Pt Platinum u Gold 8 21 g Mercury T l Thallium Pb Lead i ismuth 84 Po Polonium 85 t statine 86 Rn Radon * 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 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 13 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 21 57/11/M/J/1

Soft clean eraser Soft pencil (type B or HB is recommended)

*6370193137* ambridge International Examinations ambridge rdinary Level EMISTRY 5070/11 Paper 1 Multiple hoice May/June 2015 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil