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

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1 * * ambridge International Examinations ambridge Ordinary Level EMISTRY 5070/12 Paper 1 Multiple hoice May/June 2014 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, 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 15 printed pages and 1 blank page. I14 06_5070_12/5RP ULES 2014 [Turn over

2 1 Which process is suitable for obtaining the water from an aqueous solution of sugar? 2 crystallisation distillation filtration use of a separating funnel 2 Sulfur dioxide and oxygen react together. 2SO 2 (g) + O 2 (g) 2SO 3 (g) = -197 kj / mol Which change(s) will increase both the rate of reaction and the equilibrium concentration of SO 3? 1 adding a catalyst 2 increasing temperature 3 increasing pressure 1 only 2 1 and 3 3 only 3 The scheme shows a sequence of reactions starting from compound Y. compound Y excess NO 3 (aq) gas + colourless solution NaO(aq) white precipitate insoluble in excess NaO(aq) What could the compound Y be? aluminium sulfate calcium carbonate copper(ii) carbonate zinc carbonate ULES /12/M/J/14

3 4 The apparatus shown can be used to find the rate of some chemical reactions. 3 The rate of which reaction can be followed using this apparatus? gno 3 + KI Mg + l NaO + uso 4 NaO + l 5 rude oil is fractionally distilled in a fractionating column. The positions at which fractions X and Y are collected are shown. fractions X Y crude oil Which statement is correct? The temperature increases up the column. X condenses at a lower temperature than Y. X has a higher boiling point than Y. X has longer chain molecules than Y. ULES /12/M/J/14 [Turn over

4 4 6 n ion X + has 23 nucleons and 10 electrons. What does the nucleus of X contain? protons neutrons Which element exists as a macromolecule? carbon hydrogen oxygen sodium 8 Which substance can conduct electricity by the movement of ions? copper graphite mercury sodium chloride 9 The diagram shows the molecule ethyl propanoate. O 3 2 O 2 3 onsider all the electrons in a molecule of ethyl propanoate. ow many electrons not involved in bonding are there in the molecule? ULES /12/M/J/14

5 10 Sodium and magnesium are next to each other in the Periodic Table. 5 melting point / boiling point / Na Mg Which statement explains the differences in the melting and boiling points of these elements? Na and Mg have different types of bonding. The electrostatic forces of attraction are stronger in Mg. The ionic bonds in Mg are stronger than those in Na. The Mg atoms are larger than the Na atoms. 11 Sulfuric acid and potassium hydroxide can react together to form potassium hydrogensulfate, KSO 4, and water only. Which amounts of the reactants are required? equal masses of sulfuric acid and potassium hydroxide equal numbers of moles of sulfuric acid and potassium hydroxide 1 mol of sulfuric acid to 2 mol of potassium hydroxide 2 mol of sulfuric acid to 1 mol of potassium hydroxide 12 The diagram shows the structures of the atoms of elements L and M. e e e e e 3p 4n e e 8p 8n e e p = proton n = neutron e = electron e e L M The elements combine to form a compound. What is the mass of one mole of this compound? 11 g 12 g 23 g 30 g ULES /12/M/J/14 [Turn over

6 13 concentrated aqueous solution of sodium chloride is electrolysed. 6 What are the equations for the reactions taking place at the cathode (negative electrode) and the anode (positive electrode)? cathode ( ve) anode (+ve) e 2 2l l 2 + 2e e 2 4O O O + 4e Na + + e Na 2l l 2 + 2e Na + + e Na 4O O O + 4e 14 What is observed during the electrolysis of aqueous copper(ii) sulfate using carbon electrodes? pink solid is deposited on the anode. ubbles form on the negative electrode. The colour of the solution fades. The negative electrode becomes smaller. ULES /12/M/J/14

7 7 15 Nitrogen monoxide is an atmospheric pollutant that is formed in car engines by the reaction between nitrogen and oxygen. N 2 (g) + O 2 (g) 2NO(g) = +66 kj / mol Which diagram represents the energy profile for this reaction? enthalpy enthalpy E a E a reaction pathway reaction pathway enthalpy E a enthalpy E a reaction pathway reaction pathway 16 Which substance does not react with hydrochloric acid? zinc carbonate zinc hydroxide zinc metal zinc nitrate ULES /12/M/J/14 [Turn over

8 8 17 The table shows the energy released by the complete combustion of some compounds used as fuels. compound formula M r in kj / mol benzene heptane octane propane Which fuel releases the least energy when 1 g of the compound is completely burned? benzene heptane octane propane 18 In which circuit does the bulb light? key = bulb u u uso 4 (aq) g Nal (s) Zn u 2 5 O(l) Zn g 2 SO 4 (aq) u ULES /12/M/J/14

9 9 19 mmonia is made by a reversible reaction between nitrogen and hydrogen. N 2 (g) (g) 2N 3 (g) = 92 kj / mol What is the effect of increasing the pressure in this process? Less heat is produced. More ammonia is formed. More nitrogen is present at equilibrium. The reaction slows down. 20 Which change involves reduction? calcium carbonate to calcium oxide copper to brass ethene to poly(ethene) sand to silicon 21 Samples of three oxides, X, Y and Z, were added separately to dilute hydrochloric acid and to dilute sodium hydroxide. X and Y react with dilute hydrochloric acid but Z does not react. Y and Z react with aqueous sodium hydroxide but X does not react. Which type of oxide are each of X, Y and Z? type of oxide acidic amphoteric basic X Y Z Y X Z Z X Y Z Y X 22 Which process does not involve the use of a transition element? the manufacture of margarine from vegetable oil the manufacture of sulfuric acid in the ontact process the purification of river water to produce drinking water the removal of combustion pollutants from car exhaust gases ULES /12/M/J/14 [Turn over

10 23 Element Q is in Period 3 of the Periodic Table. It can form ions with the formula Q 3. Which element is most likely to be Q? 10 aluminium arsenic phosphorus sulfur 24 Which property would all the hydrogen compounds of the Group VII elements possess? be covalent be solids at room temperature form alkaline aqueous solutions conduct electricity when molten 25 student mixed together aqueous solutions of Y and Z. white precipitate formed. Which could not be Y and Z? Y Z hydrochloric acid silver nitrate hydrochloric acid sodium nitrate sodium chloride lead(ii) nitrate sodium chloride silver nitrate 26 luminium is extracted from its molten oxide ore by electrolysis whereas zinc is extracted by reduction of its oxide when heated with coke. Which statement explains this? luminium is very high in the reactivity series. luminium ores are very rare. Electrolysis is a cheaper method than reduction of the oxide with coke. Zinc oxide has a higher melting point than aluminium oxide. ULES /12/M/J/14

11 11 27 In which solid can layers of atoms slide over each other? diamond graphite haematite silica 28 Which ion causes the acidity in dilute hydrochloric acid? l O 29 Which metal can react rapidly with steam but reacts only very slowly with cold water? calcium copper iron potassium 30 Which gas turns moist blue litmus paper red and produces a precipitate when bubbled through calcium hydroxide solution? O O 2 l N 3 31 The diagram shows three steps in the manufacture of sulfuric acid. sulfur step P sulfur step Q sulfur step R dioxide trioxide sulfuric acid In which steps is a catalyst used? step Q only step R only steps Q and R only steps P and Q and R 32 Which property of compounds in a homologous series is correct? They all have the same general formula. They all have the same molecular formula. They all have the same number of isomers. They all have the same physical properties. ULES /12/M/J/14 [Turn over

12 12 33 Which compound, on combustion, never forms carbon? carbon monoxide ethanol ethene methane 34 Which process is an example of cracking? O 2 5 O O 2 3O O hydride is a compound containing only two elements, one of which is hydrogen. Which element can form the greatest number of different hydrides? carbon chlorine nitrogen oxygen 36 liquid reacts with each of sodium carbonate, potassium hydroxide and ethanol. What is the liquid? aqueous ammonia ethanoic acid ethyl ethanoate sodium hydroxide ULES /12/M/J/14

13 13 37 ompound X and compound Y combine to form a polymer. OO OO 2 N N 2 compound X compound Y Which of the statements about the polymer and its formation is not correct? mmonia is formed during the production of the polymer. ydrolysis of the polymer produces X and Y. The polymer is a polyamide. The polymer is formed by a condensation reaction. 38 The structural formulae of some organic compounds are shown below. O O 1 2 O O O O 3 4 Which compounds are alcohols? 1 only 1 and 2 only 1, 2 and 3 4 ULES /12/M/J/14 [Turn over

14 14 ULES /12/M/J/14 39 What is the partial structure of the polymer formed by the polymerisation of propene, 3 = 2? When a volcano erupts, which gas is produced in significant amounts? carbon monoxide methane ozone sulfur dioxide

15 15 LNK PGE ULES /12/M/J/14

16 16 T SEET The Periodic Table of the Elements 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 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 Xe s a La f Ta W Re Os Ir Pt u g Tl Pb i Po t Rn aesium arium Lanthanum afnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead ismuth Polonium statine Radon * Fr Ra c Francium Radium ctinium *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 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 103 The volume of one mole of any gas is 24 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. 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/14