Cambridge International Examinations Cambridge International General Certificate of Secondary Education

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1 * * ambridge International Examinations ambridge International General ertificate of Secondary Education EMISTRY 0620/22 Paper 2 Multiple hoice (Extended) May/June 2017 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or is recommended) 45 minutes 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. The syllabus is approved for use in England, Wales and Northern Ireland as a ambridge International Level 1/Level 2 ertificate. This document consists of 15 printed pages and 1 blank page. I17 06_0620_22/2RP ULES 2017 [Turn over

2 2 1 Small crystals of purple KMnO 4 (M r = 158) and orange K 2 r 2 O 7 (M r = 294) were placed at the centres of separate petri dishes filled with agar jelly. They were left to stand under the same physical conditions. fter some time, the colour of each substance had spread out as shown. dish 1 dish 2 KMnO 4 K 2 r 2 O 7 The lengths of the arrows indicate the relative distances travelled by particles of each substance. Which statement is correct? iffusion is faster in dish 1 because the mass of the particles is greater. iffusion is faster in dish 2 because the mass of the particles is greater. iffusion is slower in dish 1 because the mass of the particles is smaller. iffusion is slower in dish 2 because the mass of the particles is greater. 2 Impurities change the melting and boiling points of substances. Sodium chloride is added to a sample of pure water. ow does the addition of sodium chloride affect the melting point and boiling point of the water? melting point boiling point increases increases increases decreases decreases increases decreases decreases ULES /22/M/J/17

3 3 The diagram shows a chromatogram of four substances. Which substance has an R f value of approximately 0.32? 3 solvent front 19 cm 14 cm 12 cm 6 cm 4 cm baseline 0 cm 4 Which element does not form a stable ion with the same electronic structure as argon? aluminium chlorine phosphorus potassium 5 Graphite and diamond are both forms of the element carbon. Which row shows the number of other carbon atoms that each carbon atom is covalently bonded to in graphite and diamond? graphite diamond ULES /22/M/J/17 [Turn over

4 4 6 Which statement describes metallic bonding? The attraction between a lattice of negative ions and delocalised protons. The attraction between a lattice of positive ions and delocalised electrons. The attraction between delocalised protons and electrons. The attraction between oppositely charged ions. 7 Which equations are balanced? 1 Fe 2 O 3 + 3O 2Fe + 3O 2 2 ZnO 3 + 2l Znl 2 + O O 3 Mg(NO 3 ) 2 + NaO Mg(O) 2 + 2NaNO 3 4 ao SO 4 aso O + O 2 1 and 2 1 and 4 2 and 3 3 and 4 8 alcium carbide, a 2, reacts with water to form ethyne, 2 2, and calcium hydroxide. The equation for the reaction is shown. a 2 (s) O(l) 2 2 (g) + a(o) 2 (s) Which volume of ethyne is produced when 6 g of water react completely with calcium carbide? 4 dm 3 8 dm 3 36 dm 3 72 dm 3 9 Which statement about electrolysis is correct? Electrons move through the electrolyte from the cathode to the anode. Electrons move towards the cathode in the external circuit. Negative ions move towards the anode in the external circuit. Positive ions move through the electrolyte towards the anode during electrolysis. ULES /22/M/J/17

5 5 10 The reactivity series for a number of different metals is shown. most reactive least reactive magnesium zinc iron copper silver platinum The diagram shows different metal strips dipped into an electrolyte. V metal strip metal strip electrolyte Which pair of metals produces the highest voltage? copper and magnesium magnesium and platinum magnesium and zinc silver and platinum 11 Which statement about fuels is correct? eat energy can only be produced by burning fuels. ydrogen is used as a fuel although it is difficult to store. Methane is a good fuel because it produces only water when burned. Uranium is burned in air to produce energy. 12 Which statements about exothermic and endothermic reactions are correct? 1 uring an exothermic reaction, heat is given out. 2 The temperature of an endothermic reaction goes up because heat is taken in. 3 urning methane in the air is an exothermic reaction. 1, 2 and 3 1 and 2 only 1 and 3 only 2 and 3 only ULES /22/M/J/17 [Turn over

6 6 13 The equation for the reaction between hydrogen and chlorine is shown. 2 (g) + l 2(g) 2l (g) The reaction is exothermic. The bond energies are shown in the table. bond bond energy in kj / mol l l +240 l What is the energy change for the reaction? 1536 kj / mol 184 kj / mol +184 kj / mol +246 kj / mol 14 gas is produced when calcium carbonate is heated. Which type of change is this? chemical exothermic physical separation ULES /22/M/J/17

7 15 student was investigating the reaction between marble chips and dilute hydrochloric acid. 7 gas syringe bung marble chips 25 cm 3 of dilute hydrochloric acid Which changes slow down the rate of reaction? temperature of acid concentration of acid surface area of marble chips decrease decrease decrease decrease decrease increase increase decrease decrease increase increase increase 16 The reaction used to manufacture ammonia from nitrogen and hydrogen is reversible. n equilibrium can be established between ammonia, nitrogen and hydrogen. Which statement describes the equilibrium? oth the forward reaction and the backward reaction have the same rate. The rate of the backward reaction is greater than the rate of the forward reaction. The rate of the forward reaction is greater than the rate of the backward reaction. The forward and backward reactions have both stopped. 17 n example of a redox reaction is shown. Zn + u 2+ Zn 2+ + u Which statement about the reaction is correct? Zn is the oxidising agent and it oxidises u 2+. Zn is the oxidising agent and it reduces u 2+. Zn is the reducing agent and it oxidises u 2+. Zn is the reducing agent and it reduces u 2+. ULES /22/M/J/17 [Turn over

8 8 18 Which type of oxide is aluminium oxide? acidic amphoteric basic neutral 19 Which statements about a weak acid, such as ethanoic acid, are correct? 1 It reacts with a carbonate. 2 It does not neutralise aqueous sodium hydroxide solution. 3 It turns red litmus blue. 4 It is only partially ionised in aqueous solution. 1 and 2 1 and 4 2 and 3 3 and 4 20 Silver chloride is a white solid which is insoluble in water. Which statement describes how a sample of pure silver chloride can be made? dd aqueous silver nitrate to aqueous sodium chloride and then filter. dd aqueous silver nitrate to dilute hydrochloric acid, evaporate and then crystallise. dd silver carbonate to dilute hydrochloric acid, evaporate and then crystallise. dd silver to dilute hydrochloric acid, filter and then wash the residue. 21 ilute sulfuric acid is added to two separate aqueous solutions, X and Y. The observations are shown. solution X solution Y white precipitate bubbles of a colourless gas Which row shows the ions present in the solutions? solution X solution Y a 2+ 2 O 3 a 2+ l u 2+ 2 O 3 Fe 2+ NO 3 ULES /22/M/J/17

9 22 Which element is less reactive than the other members of its group in the Periodic Table? 9 astatine caesium fluorine rubidium 23 The elements oxygen and sulfur are in the same group of the Periodic Table. Which statement about oxygen and sulfur is not correct? They are non-metals. They have giant covalent structures. They have six electrons in their outer shells. They react together to form an acidic oxide. 24 Why are weather balloons sometimes filled with helium rather than hydrogen? elium is found in air. elium is less dense than hydrogen. elium is more dense than hydrogen. elium is unreactive. 25 Which process is involved in the extraction of zinc from zinc blende? ryolite is added to lower the melting point of zinc blende. Molten zinc blende is electrolysed. Zinc blende is heated with carbon. Zinc blende is roasted in air. ULES /22/M/J/17 [Turn over

10 10 26 Element E: forms an alloy has a basic oxide is below hydrogen in the reactivity series. What is E? carbon copper sulfur zinc 27 list of metals is shown. aluminium copper iron magnesium silver zinc Which metal will displace all of the other metals from aqueous solutions of their salts? aluminium iron magnesium zinc 28 Stainless steel is an alloy of iron and other metals. It is strong and does not rust but it costs much more than normal steel. What is not made from stainless steel? cutlery pipes in a chemical factory railway lines saucepans ULES /22/M/J/17

11 11 29 The diagram shows some uses of water in the home For which uses is it important for the water to have been treated? 1 only 2 only 3 only 1, 2 and 3 30 The carbon cycle includes the processes combustion, photosynthesis and respiration. Which row shows how each process changes the amount of carbon dioxide in the atmosphere? combustion photosynthesis respiration decreases decreases increases decreases increases decreases increases decreases increases increases increases decreases 31 Which statement about the conditions used in the aber process is not correct? high temperature is used because the forward reaction is exothermic. high pressure is used because there are fewer moles of gas in the products than in the reactants. n iron catalyst is used to increase the rate of the forward reaction. The unreacted hydrogen and nitrogen are recycled to increase the amount of ammonia produced. 32 Which chemical reaction decreases pollution in the air? S + O 2 SO 2 N 2 + O 2 2NO O 2 2O O 2NO + 2O 2O 2 + N 2 ULES /22/M/J/17 [Turn over

12 33 Which statement about sulfuric acid is correct? 12 It is made by the aber process. It is made in the atmosphere by the action of lightning. It reacts with ammonia to produce a fertiliser. It reacts with copper metal to produce hydrogen gas. 34 Statements about methods of manufacture and uses of calcium oxide are shown. 1 It is manufactured by reacting acids with calcium carbonate. 2 It is manufactured by heating calcium carbonate. 3 It is used to desulfurise flue gases. 4 It is used to treat alkaline soil. Which statements are correct? 1 and 2 1 and 4 2 and 3 3 and 4 35 The industrial fractional distillation of petroleum is shown. refinery gas gasoline fraction naphtha fraction kerosene fraction diesel oil fuel oil fraction petroleum Y lubricating fraction and bitumen Which process happens at Y? burning condensation cracking evaporation ULES /22/M/J/17

13 13 36 Which statement about homologous series is not correct? lkenes have the same general formula, n 2n+2. Each member of the homologous series of alkanes differs from the next by 2. The members of a homologous series all have similar chemical properties. The members of a homologous series all have the same functional group. 37 The diagram shows part of the molecule of a polymer. Which diagram shows the monomer from which this polymer could be manufactured? O 38 Ethanol is manufactured by fermentation or by the catalytic addition of steam to ethene. What is an advantage of ethanol manufacture by fermentation instead of by the catalytic addition of steam to ethene? Ethanol manufactured by fermentation is purified by distillation. Ethanol manufacture by fermentation produces purer ethanol. Ethanol manufacture by fermentation uses large areas of land. Ethanol manufacture by fermentation uses renewable resources. 39 The formula of an ester is OO Which acid and alcohol react together to make the ester? acid alcohol butanoic acid butanol butanoic acid propanol propanoic acid butanol propanoic acid propanol ULES /22/M/J/17 [Turn over

14 14 40 Polyesters and polyamides are types of synthetic polymer. Which statements are correct? 1 They are made by addition polymerisation. 2 They are made by condensation polymerisation. 3 The monomers from which they are made are unsaturated hydrocarbons. 4 The monomers from which they are made contain reactive functional groups at their ends. 1 and 3 1 and 4 2 and 3 2 and 4 ULES /22/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 /22/M/J/17

16 16 ULES /22/M/J/17 Group The Periodic Table of Elements 1 hydrogen 1 2 e 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 f 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 s 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 g 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 o 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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