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1 * * ambridge International Examinations ambridge Ordinary Level HEMISTRY 5070/12 Paper 1 Multiple hoice May/June 2017 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or H is recommended) 1 hour RE THESE INSTRUTIONS FIRST Write in soft pencil. o not use staples, paper clips, 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. O NOT WRITE IN NY ROES. 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. Electronic calculators may be used. This document consists of 14 printed pages and 2 blank pages. I17 06_5070_12/3RP ULES 2017 [Turn over

2 2 1 The diagram shows four pieces of apparatus that are used to measure the volume of a gas or liquid. Which piece of apparatus should always be filled to the same level? burette gas syringe measuring cylinder pipette 2 The diagrams show the structures of two forms of carbon. Which of X and Y conduct electricity? X Y X Y ULES /12/M/J/17

3 3 n aqueous solution of zinc chloride is tested by adding reagents. Which observation is correct? 3 reagent added to zinc chloride (aq) observations acidified aqueous barium nitrate forms a white precipitate aqueous ammonia forms a white precipitate, soluble in excess of the reagent aqueous sodium hydroxide forms a white precipitate, insoluble in excess of the reagent powdered copper forms a grey precipitate 4 Which statement about the particles 19 F and Na 9, Ne 11 is correct? They all contain more electrons than protons. They all contain more neutrons than protons. They all contain the same number of electrons. They all contain the same number of protons. 5 The table shows some properties of four substances. Which substance is an ionic compound? melting point / conducts electricity when solid dissolves in water conducts electricity in aqueous solution ULES /12/M/J/17 [Turn over

4 4 6 Four samples are spotted onto chromatography paper. It is known that one of these samples is pure compound Q. separate sample of pure compound Q is also spotted onto the paper. The paper is placed in a solvent. The diagram shows the chromatogram produced. solvent front sample Q start Which statement is correct? Sample 2 has travelled the furthest and sample 3 is pure compound Q. Sample 3 has travelled the furthest and sample 2 is pure compound Q. Sample 4 has travelled the furthest and sample 1 is pure compound Q. Sample 4 has travelled the furthest and sample 2 is pure compound Q. 7 How many of the molecules shown contain only one covalent bond? l 2 H 2 Hl N 2 O Which statements about sulfur and its compounds are correct? 1 Sulfur is in Group VI of the Periodic Table and has six outer shell electrons. 2 In hydrogen sulfide, H 2 S, sulfur shares one electron with each hydrogen atom. 3 Sulfur dioxide is used as a bleach. 1, 2 and 3 1 and 2 only 1 and 3 only 2 and 3 only ULES /12/M/J/17

5 cm 3 of 0.10 mol / dm 3 silver nitrate, gno 3, is added to cm 3 of 0.05 mol / dm 3 sodium chloride, Nal, in a beaker. s well as solid silver chloride, what is present in the beaker after reaction? aqueous silver nitrate and aqueous sodium nitrate aqueous sodium chloride and aqueous sodium nitrate aqueous sodium chloride only aqueous sodium nitrate only 10 Nitrogen monoxide and oxygen react to form nitrogen dioxide. 2NO(g) + O 2 (g) 2NO 2 (g) What is the maximum volume of nitrogen dioxide that could be obtained when 1 dm 3 of nitrogen monoxide reacts with 2 dm 3 of oxygen? 1 dm 3 2 dm 3 3 dm 3 4 dm 3 11 ilute sulfuric acid is electrolysed between inert electrodes. Which statements are correct? 1 Hydrogen is released at the negative electrode. 2 Oxygen is released at the positive electrode. 3 Sulfur dioxide is released at the positive electrode. 4 The acid becomes more concentrated. 1, 2 and 4 1 and 2 only 2 and 3 3 and 4 12 aesium, s, is in the same group of the Periodic Table as sodium. Which products are obtained from the electrolysis of concentrated aqueous caesium chloride? product at negative electrode solution remaining caesium hydrochloric acid chlorine caesium hydroxide hydrogen caesium hydroxide hydrogen hydrochloric acid ULES /12/M/J/17 [Turn over

6 6 13 The diagrams show the apparatus for the electrolysis of aqueous copper(ii) sulfate. In experiment X both electrodes are inert. In experiment Y both electrodes are made of copper. + + electrode 1 (inert) electrode 2 (inert) electrode 3 (copper) electrode 4 (copper) aqueous copper(ii) sulfate aqueous copper(ii) sulfate X Y On which electrodes is solid metal deposited? 1 and 2 1 and 3 2 and 4 3 and 4 14 The energy profile diagram for the forward direction of a reversible reaction is shown. energy activation energy H progress of reaction For the reverse reaction, which row correctly shows the sign of the activation energy and the type of enthalpy change? sign of activation energy type of enthalpy change negative endothermic negative exothermic positive endothermic positive exothermic ULES /12/M/J/17

7 7 15 The formation of liquid water from hydrogen and oxygen may occur in three stages. 1 2H 2 (g) + O 2 (g) 4H(g) + 2O(g) 2 4H(g) + 2O(g) 2H 2 O(g) 3 2H 2 O(g) 2H 2 O(l) Which stages would be exothermic? 1, 2 and 3 1 and 2 only 2 and 3 only 2 only 16 In four separate experiments, 1, 2, 3 and 4, nitric acid was added to excess marble chips and the volume of carbon dioxide formed was measured. In all four experiments the same volume of nitric acid was used. Its concentration, or temperature, or both concentration and temperature, were changed. The results of the experiments are shown on the graph. volume of O 2 produced / cm time / min Which statement is correct? lower concentration of acid was used in experiment 3 than in experiment 1. Experiment 4 was faster than experiment 3. The acid used in experiment 2 was of a lower concentration than in experiment 1. The temperature of the acid was the same in experiments 1 and The equation shows the formation of sulfur trioxide in the contact process. What would decrease the yield of sulfur trioxide? 2SO 2 (g) + O 2 (g) 2SO 3 (g) H = 196 kj / mol addition of more oxygen an increase in pressure an increase in temperature removal of sulfur trioxide from the reaction chamber ULES /12/M/J/17 [Turn over

8 8 18 Zinc reacts with dilute sulfuric acid. Zn + H 2 SO 4 ZnSO 4 + H 2 From this equation, what can be deduced about the reaction? It is a redox reaction. It is exothermic. Zinc is acting as a base. Zinc is acting as a catalyst. 19 onsider the three reactions. 1 reaction between ammonium chloride and calcium hydroxide 2 ethane burning in air 3 reaction between ethanoic acid and ethanol What is true for all three reactions? arbon dioxide is formed. Neutralisation takes place. Oxidation takes place. Water is formed. 20 Which statement about weak acids is correct? They are partially ionised. They do not react with metals. They do not react with strong alkalis. Their solutions have ph values in the range 0 to Which gas dissolves in water to give a solution with a ph greater than 7? ammonia carbon dioxide nitrogen dioxide sulfur dioxide ULES /12/M/J/17

9 9 22 Element X forms an oxide of formula X 2 O 5. In which group of the Periodic Table is X likely to be found? Group II Group III Group V Group VIII 23 Element M is a typical transition metal. Which property will it not have? a low melting point coloured compounds good electrical conductivity variable oxidation states 24 n atom of element E forms a white oxide of formula EO. What is E? argon calcium copper potassium 25 The table shows the proton numbers of four elements. Which statement is correct? element Q R T Z proton number Q is a metal. Q is more reactive than T. R is more reactive than Z. T and Z are in the same period. ULES /12/M/J/17 [Turn over

10 10 26 The results of experiments involving four metals, W, X, Y and Z, and their ions are shown. Y(s) + Z + (aq) Y + (aq) + Z(s) W(s) + X + (aq) no reaction Z(s) + X + (aq) Z + (aq) + X(s) What is the order of reactivity of the four metals, most reactive to least reactive? W X Y Z X W Z Y Y Z X W Z Y W X 27 Metals have a structure of positive ions in a sea of electrons. Metals are malleable because it is possible to force the ions to slide over each other. The alloy brass is malleable than pure copper and than pure zinc. rass is to conduct electricity. Which words correctly complete gaps 1 and 2? 1 2 less unable less able more unable more able 28 Which two substances are removed from the bottom of a blast furnace? 1 coke 2 iron 3 limestone 4 slag 1 and 3 1 and 4 2 and 3 2 and 4 ULES /12/M/J/17

11 11 29 luminium is used in the manufacture of aeroplanes. What is a property of aluminium and is also a reason for this use? It has a low density. It is a good conductor of electricity. It is a poor conductor of heat. It is covered in an unreactive layer of aluminium carbonate. 30 How can the reaction between nitrogen and hydrogen be described? a displacement reaction a neutralisation reaction a precipitation reaction a reversible reaction 31 ottled fruit juice may have small amounts of sulfur dioxide added. What is the purpose of this? to adjust the acidity of the fruit juice to kill any bacteria present to improve the flavour of the fruit juice to neutralise any alkalis present 32 issolved substances in water can cause eutrophication. How many of the ions shown cause this effect? l O 3 2 Na + NO 3 PO Which list contains only gases that are always present in unpolluted air? oxygen, nitrogen, carbon dioxide, argon, carbon monoxide, nitrogen dioxide oxygen, nitrogen, carbon dioxide, argon, neon oxygen, nitrogen, carbon dioxide, nitrogen dioxide, ozone oxygen, nitrogen, carbon monoxide, methane, sulfur dioxide ULES /12/M/J/17 [Turn over

12 12 34 One mole of each alkane undergoes complete combustion. Which alkane will produce seven moles of products? H 4 2 H 6 3 H 8 4 H Ethanoic acid is formed when ethanol is reacted with acidified potassium manganate(vii). What is the name of this process? combustion condensation oxidation polymerisation 36 The structure of compound X is shown. Which statement is not correct? H 3 H 2 H 2 H 2 OH X is an alcohol because it contains an OH group. X is an isomer of propanol. X would burn in air to form carbon dioxide and water. X would have a higher boiling point than ethanol. 37 fter which conversion does the product contain more carbon atoms than the reactant? ethanol to ethanoic acid ethanol to ethyl ethanoate ethene to ethane ethene to ethanol ULES /12/M/J/17

13 38 Molecules 14 are unbranched hydrocarbons H H H H 16 Which row correctly identifies these hydrocarbons as alkanes or alkenes? alkane alkene 1 and 2 3 and 4 1 and 3 2 and 4 1 and 4 2 and 3 2 and 3 1 and 4 39 Which polymer contains only three different elements? protein poly(ethene) poly(propene) starch 40 Which statement about macromolecules is correct? Nylon and Terylene are both polyesters. Proteins and nylon have the same monomer units. Proteins have the same amide linkages as nylon. Terylene and fats are esters but with different linkages. ULES /12/M/J/17

14 14 LNK PGE ULES /12/M/J/17

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. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the ambridge International Examinations opyright cknowledgements ooklet. This is produced for each series of examinations and is freely available to download at after the live examination series. 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 /12/M/J/17

16 16 ULES /12/M/J/17 Group The Periodic Table of Elements 1 H hydrogen 1 2 He helium 4 I II III IV V VI VII VIII 3 Li lithium 7 4 e beryllium 9 atomic number atomic symbol Key name relative atomic mass 11 Na sodium Mg magnesium K potassium a calcium Rb rubidium Sr strontium s caesium a barium Fr francium 88 Ra radium 5 boron l aluminium Ga gallium In indium Tl thallium carbon Si silicon Ge germanium Sn tin Pb lead Ti titanium Zr zirconium Hf hafnium Rf rutherfordium 23 V vanadium Nb niobium Ta tantalum b dubnium 24 r chromium Mo molybdenum W tungsten Sg seaborgium 25 Mn manganese Tc technetium 75 Re rhenium h bohrium 26 Fe iron Ru ruthenium Os osmium Hs hassium 27 o cobalt Rh rhodium Ir iridium Mt meitnerium 28 Ni nickel Pd palladium Pt platinum s darmstadtium 29 u copper g silver u gold Rg roentgenium 30 Zn zinc d cadmium Hg mercury n copernicium 114 Fl flerovium 116 Lv livermorium 7 N nitrogen P phosphorus s arsenic Sb antimony i bismuth O oxygen S sulfur Se selenium Te tellurium Po polonium 9 F fluorine l chlorine r bromine I iodine t astatine 10 Ne neon r argon Kr krypton Xe xenon Rn radon 21 Sc scandium Y yttrium lanthanoids actinoids 57 La lanthanum c lanthanoids actinoids The volume of one mole of any gas is 24 dm 3 at room temperature and pressure (r.t.p.). actinium 58 e cerium Th thorium Pr praseodymium Pa protactinium Nd neodymium U uranium Pm promethium 93 Np neptunium 62 Sm samarium Pu plutonium 63 Eu europium m americium 64 Gd gadolinium m curium 65 Tb terbium k berkelium 66 y dysprosium f californium 67 Ho holmium Es einsteinium 68 Er erbium Fm fermium 69 Tm thulium Md mendelevium 70 Yb ytterbium No nobelium 71 Lu lutetium Lr lawrencium

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