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

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1 ambridge International Examinations ambridge rdinary Level * * EMISTRY 5070/11 Paper 1 Multiple hoice ctober/november 2015 dditional Materials: RE TESE INSTRUTINS FIRST Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or recommended) 1 hour 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. NT WRITE IN NY RES. 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. I15 11_5070_11/4RP ULES 2015 [Turn over

2 1 Which process is used in the preparation of soluble salts? 2 electrolysis evaporation melting precipitation 2 Which positive ions are present in aqueous copper(ii) sulfate? copper ions only copper ions and hydrogen ions sulfate ions only sulfate ions and hydroxide ions 3 In a titration between an acid (in the burette) and an alkali, you may need to re-use the same titration flask. Which is the best procedure for rinsing the flask? Rinse with distilled water and then with the alkali. Rinse with tap water and then with distilled water. Rinse with tap water and then with the acid. Rinse with the alkali. 4 Two containers, one of methane and one of butane, are placed at the same distance from a naked flame. oth gases are released at the same time. The methane gas reaches the flame and catches fire before the butane gas reaches the flame. Which statement explains this? Each methane molecule has a higher proportion of hydrogen than each butane molecule. Methane does not have isomers, butane does have isomers. Methane has a higher boiling point than butane. Methane molecules have a smaller mass than butane molecules. ULES /11//N/15

3 3 5 Metal X oxidises in air. The formula of the oxide is X. X displaces zinc from aqueous zinc nitrate. Which could be X? aluminium lead magnesium sodium 6 Which is a compound? air carbon oxygen steam 7 ow is a calcium ion, a 2+, formed from a calcium atom? by gaining two electrons by gaining two protons by losing two electrons by losing two protons 8 n oxygen atom contains 8 electrons, 8 protons and 10 neutrons. What is the nucleon number of this atom? molecule of sulfuric acid has the structural formula shown. S ow many electrons are involved in forming all the covalent bonds in one molecule? ULES /11//N/15 [Turn over

4 10 metal consists of a lattice of positive ions in a sea of electrons. 4 What happens 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 11 The equation shown represents the neutralisation of aqueous sodium hydroxide with dilute sulfuric acid. 2Na(aq) + 2 S 4 (aq) Na 2 S 4 (aq) (l) ow much sulfuric acid is required to neutralise 100 cm 3 of 1.0 mol / dm 3 Na? 50 cm 3 of 2.0 mol / dm 3 sulfuric acid 100 cm 3 of 1.0 mol / dm 3 sulfuric acid 25 cm 3 of 0.5 mol / dm 3 sulfuric acid 50 cm 3 of 1.0 mol / dm 3 sulfuric acid 12 Which change in conditions increases the energy of particles in a reaction? increase in concentration increase in pressure increase in temperature presence of a catalyst 13 Which change is endothermic? 4 (g) (g) 2 (g) (l) (g) + l (g) l (g) 2 (g) 2(g) + (g) 2 (l) 2 (s) ULES /11//N/15

5 5 14 The enthalpy changes when methane, butane and octane are burned completely in oxygen are shown below. enthalpy change (kj / mol) methane, butane, octane, Which are the enthalpy changes when propane and pentane are burned completely in oxygen? propane, 3 8 (kj / mol) pentane, 5 12 (kj / mol) In the ionic solid zinc phosphide, Zn 3 P 2, what is the formula of the phosphide ion? P 3 P 3+ P 4 P 2+ ULES /11//N/15 [Turn over

6 6 16 Iron is produced in the blast furnace. waste gases raw materials hot air slag molten iron Which statement about this process is correct? arbon is oxidised to carbon dioxide. arbon monoxide is produced by the thermal decomposition of calcium carbonate. aematite is reduced by calcium carbonate. Impurities are removed by the hot air blast. 17 The energy profile diagram for a reaction is shown. 3 energy 2 products 1 reactants progress of reaction Which statement is correct? The activation energy of the reaction is ( 3 1 ). The activation energy of the reaction is ( 3 2 ). is ( 1 2 ). is ( 1 3 ). ULES /11//N/15

7 18 In which reaction is nitric acid acting as an oxidising agent? 7 u + 4N 3 u(n 3 ) N 2 u + 2N 3 u(n 3 ) Na N 3 2NaN Na + N 3 NaN Which occurs during the electrolysis of dilute sulfuric acid? ydrogen and oxygen are formed in the ratio two volumes of oxygen to one volume of hydrogen. ydrogen is formed at the positive electrode. xide ions are oxidised to oxygen. The dilute sulfuric acid becomes more concentrated. 20 Methanol is made in industry by a reaction between carbon monoxide and hydrogen. (g) (g) 3 (g) = 90 kj / mol The process is usually carried out at a temperature of 400. Which row correctly shows the effect on both the position of the equilibrium and on the rate of the reaction of increasing the temperature to above 400? position of equilibrium rate of reaction moves to left decreases moves to left increases moves to right decreases moves to right increases 21 Which statement about graphite is not correct? It burns to form carbon dioxide. It is a carbon compound. It is a giant molecular substance. It is used as a lubricant. ULES /11//N/15 [Turn over

8 22 mmonium nitrate, N 4 N 3, is an artificial fertiliser produced from ammonia. What is an advantage of using ammonium nitrate as a fertiliser? 8 It contains a large percentage by mass of nitrogen. It gives off ammonia gas. Nitrates are insoluble. Nitrates can cause eutrophication. 23 Four metals and hydrogen are arranged in order of decreasing reactivity. potassium aluminium zinc hydrogen copper decrease in reactivity Which statement about these elements is correct? luminium is formed when aluminium oxide is heated with hydrogen. opper displaces zinc from zinc sulfate solution. opper is formed when copper(ii) oxide is heated with hydrogen. When added to water, aluminium forms positive ions more readily than potassium. 24 Which pair of substances reacts to form a salt and water only? aqueous sodium chloride and aqueous silver nitrate aqueous sodium hydroxide and dilute ethanoic acid aqueous sodium carbonate and dilute sulfuric acid zinc and dilute hydrochloric acid 25 n element is burned in an excess of oxygen. Which statement about the oxide formed is always correct? The mass of oxide formed is greater than the mass of element burned. The oxide formed is a crystalline solid. The oxide formed is soluble in water. The oxide formed is white in colour. ULES /11//N/15

9 26 Which reaction does not involve neutralisation? 9 2 S 4 (aq) + 2N 3 (aq) (N 4 ) 2 S 4 (aq) 2 S 4 (aq) + al 2(aq) as 4 (s) + 2l (aq) 2 S 4 (aq) + u(s) us 4 (aq) + 2 (l) 2 S 4 (aq) + 2Na(aq) Na 2 S 4 (aq) (l) 27 Which element described in the table is a transition metal? number of oxidation states coloured compounds melting point density one no high low two no low high two yes high high two yes low low 28 Three different elements react by losing electrons. The ions formed all have the electronic configuration 2,8. Which statement about these elements is correct? They are in the same group. They are in the same period. They are noble gases. They are transition elements. 29 n alloy of aluminium is used in the construction of aircraft. Why is pure aluminium never used? Pure aluminium cannot be manufactured. Pure aluminium conducts electricity. Pure aluminium is less dense than its alloys. Pure aluminium is too malleable. ULES /11//N/15 [Turn over

10 30 What happens when a strip of silver is immersed in an aqueous solution of copper(ii) sulfate? 10 ubbles of gas will appear. No reaction occurs. Pink copper will be deposited on the silver strip. The silver strip will start to dissolve. 31 The flow chart shows how impure water can be treated to produce drinkable water. impure water pass through large-sized gravel pass through small-sized gravel pass through carbon pass chlorine through it drinkable water What is not removed from the water by this process? clay particles microbes nitrates odours 32 Which property of a liquid ester can be used to check its purity before use as a food flavouring? boiling point colour smell solubility in water 33 Which alcohol will, on oxidation, produce 3 2 2? ULES /11//N/15

11 11 34 The diagram shows the structure of an organic acid. Which row is correct? name of acid reacts with aqueous sodium carbonate to produce carbon dioxide butanoic acid no butanoic acid yes propanoic acid no propanoic acid yes 35 carbohydrate such as starch can be represented as shown. What is X? X X X X carbon hydrogen nitrogen oxygen ULES /11//N/15 [Turn over

12 12 36 P is a polymer that has six carbon atoms in each of the monomers from which it was formed, is not a polyester, was formed using condensation polymerisation. What is the partial structure of P? ( 2 ) 4 ( 2 ) 6 ( 2 ) 6 N ( 2 ) 6 N ( 2 ) 4 N ( 2 ) 6 N 37 What are the products of photosynthesis? carbon dioxide and oxygen carbon dioxide and water glucose and water glucose and oxygen ULES /11//N/15

13 38 Which diagram shows the structure of an alloy? ydrogen and nitrogen react to form ammonia. Which statement is correct? N N 3 mmonia is made in industry by the ontact process. mmonia is used in industry to make hydrogen and nitrogen. ydrogen, for the forward reaction, is obtained from cracking oil. Weed killers are manufactured from ammonia. 40 Which statement about the hydrocarbon 2 4 is not correct? It contains a double bond. It decolourises bromine water. It forms a condensation polymer. It forms an alcohol when reacted with steam. ULES /11//N/15

14 14 LNK PGE ULES /11//N/15

15 15 LNK PGE ULES /11//N/15

16 16 T SEET The Periodic Table of the Elements Group I II III IV V VI VII 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 Ne Neon Na Sodium Mg Magnesium l luminium Si Silicon P Phosphorus S Sulfur l hlorine r rgon K Potassium a alcium Sc Scandium Ti Titanium V Vanadium r hromium Mn Manganese Fe Iron o obalt Ni Nickel u opper Zn Zinc Ga Gallium Ge Germanium s rsenic Se Selenium r romine Kr Krypton Rb Rubidium Sr Strontium Y Yttrium 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 g Mercury Tl Thallium Pb Lead i ismuth 84 Po Polonium 85 t statine 86 Rn Radon *58-71 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 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 103 The volume of one mole of any gas is 24 dm 3 at room temperature and pressure (r.t.p.). 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. ULES /11//N/15

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