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1 * * ambridge International Examinations ambridge Ordinary Level EMISTRY 5070/11 Paper 1 Multiple hoice October/November 2014 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or 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 14 printed pages and 2 blank pages. I14 11_5070_11/4RP ULES 2014 [Turn over

2 2 1 alcium carbonate reacts with hydrochloric acid, producing carbon dioxide gas. ao 3 (s) + 2l (aq) al 2(aq) + 2 O(l) + O 2 (g) The rate of this reaction can be measured using the apparatus shown. Which additional piece of apparatus is also required? a burette a clock a gas syringe a thermometer 2 Which compound when in aqueous solution will produce a red / brown precipitate on the addition of an aqueous solution of Fe 3+ ions? hydrogen chloride sodium chloride sodium hydroxide sulfur trioxide 3 What is the correct sequence for obtaining pure salt from a mixture of sand and salt? add water, evaporate add water, filter add water, filter, evaporate filter, add water, evaporate ULES /11/O/N/14

3 4 The diagram shows the structure of which element in Period 3? 3 aluminium magnesium silicon sodium 5 The table contains information on the structure of four particles. particle proton number number of protons number of neutrons number of electrons Mg W 12 Mg X F Y F Z What are the values of W, X, Y and Z in the table above? W X Y Z Which statement describes ionic bonding? a lattice of ions in a sea of electrons electrostatic attraction between oppositely charged ions the sharing of electrons between atoms to gain a noble gas configuration the transfer of electrons from atoms of a non-metal to the atoms of a metal ULES /11/O/N/14 [Turn over

4 7 The experiment shown is used to test potassium bromide crystals. 4 lamp beaker electrodes potassium bromide crystals The lamp does not light. istilled water is then added to the beaker and the lamp lights. Which statement explains these results? Electrons are free to move in the solution when potassium bromide dissolves. Metal ions are free to move when potassium bromide melts. Metal ions are free to move when potassium reacts with water. Oppositely charged ions are free to move in the solution when potassium bromide dissolves. 8 Why does ammonia gas diffuse faster than hydrogen chloride gas? mmonia has a higher boiling point than hydrogen chloride. mmonia is a base, hydrogen chloride is an acid. The ammonia molecule contains more atoms than a hydrogen chloride molecule. The relative molecular mass of ammonia is smaller than that of hydrogen chloride. 9 Which molecule has only four electrons involved in covalent bonds? 2 S O 2 l 2 N 2 ULES /11/O/N/14

5 volume of ethane, 2 6, at r.t.p. has a mass of 20 g. What is the mass of an equal volume of propene, 3 6, at r.t.p.? 20 g 21 g 28 g 42 g 11 Which element requires the largest number of electrons for one mole of the metal to be formed from its aqueous ions during electrolysis? aluminium calcium copper sodium 12 Which changes are observed during the electrolysis of aqueous copper(ii) sulfate using copper electrodes? 1 pink solid is deposited on the negative electrode. 2 ubbles form on the positive electrode. 3 The colour of the solution does not change. 1 and 2 only 1 and 3 only 2 and 3 only 1, 2 and 3 13 nalysis of a sample of an oxide of nitrogen gave the following data. percentage by mass of nitrogen 47% percentage by mass of oxygen 53% What is the empirical formula of this oxide? [ r : N, 14; O, 16] NO NO 2 N 2 O N 2 O 3 14 Petroleum is a mixture of hydrocarbons which can be separated into fractions by fractional distillation. Which row shows the fractions in order of decreasing boiling point? highest b.p. lowest b.p. diesel paraffin naphtha petrol paraffin naphtha petrol diesel naphtha petrol diesel paraffin petrol naphtha paraffin diesel ULES /11/O/N/14 [Turn over

6 15 Which is not true about the process of photosynthesis? 6 arbon dioxide and water react in a 1 : 1 molar ratio. Glucose is produced and can be used as a source of energy. Oxygen is produced. The reaction is exothermic. 16 The equation shows the reaction for the manufacture of ammonia. N 2 (g) (g) 2N 3 (g) Which change will decrease the activation energy of the reaction? addition of a catalyst decrease in temperature increase in concentration increase in pressure 17 Which ionic equation represents a redox reaction? g + + l gl a SO 4 aso O 2 O Zn + u 2+ Zn 2+ + u 18 The equation shows the reaction for the formation of sulfur trioxide using a catalyst. 2SO 2 (g) + O 2 (g) 2SO 3 (g) = 197 kj / mol Which change in reaction conditions would produce more sulfur trioxide? adding more catalyst decreasing the pressure increasing the temperature removing some sulfur trioxide ULES /11/O/N/14

7 19 To which substance is dilute sulfuric acid added to prepare lead(ii) sulfate? 7 aqueous lead(ii) nitrate lead foil powdered lead(ii) carbonate powdered lead(ii) oxide 20 Which metal can react with water at r.t.p.? calcium copper lead zinc 21 Which statement about amphoteric oxides is not correct? They dissolve in water. They are formed only by metals. They react with aqueous sodium hydroxide to give salts. They react with aqueous acids to give salts. 22 Which statement explains why the chemical properties of sodium and potassium are similar? They are in the same group of the Periodic Table. They are in the same period of the Periodic Table. They are soft and can be cut with a knife. They have similar melting points. ULES /11/O/N/14 [Turn over

8 23 The diagram shows an outline of part of the Periodic Table. 8 Y Z W X Which statement is not correct? The melting point of W is lower than that of Z. W and Z could react together and form a compound, WZ. X could form an oxide, X 2 O 3. Y could form an oxide, YO The diagram shows apparatus that can be used to extract aluminium. J K L What are J, K and L? J K L negative electrode aluminium oxide + cryolite aluminium negative electrode cryolite aluminium oxide positive electrode aluminium oxide cryolite positive electrode aluminium oxide + cryolite aluminium ULES /11/O/N/14

9 9 25 Sulfur is burnt in air. Which statement about this reaction is correct? The gas formed turns aqueous potassium dichromate(vi) from green to orange. The product is used as a food preservative. The reaction is endothermic. The reaction is reversible. 26 gas G 1 has no smell, 2 is not poisonous, 3 reacts with hydrogen at high temperature and pressure. What is gas G? carbon monoxide helium nitrogen chlorine 27 Which method of water purification can be used to obtain drinkable water from seawater? chlorination desalination filtration sedimentation 28 Which atmospheric pollutant is produced by bacterial decay of vegetable matter? carbon monoxide methane ozone sulfur dioxide ULES /11/O/N/14 [Turn over

10 29 Substance P reacts with dilute hydrochloric acid to produce a gas. This gas reduces substance Q. 10 Q heat dilute hydrochloric acid P What are substances P and Q? P Q copper copper(ii) oxide lead lead(ii) oxide magnesium zinc oxide zinc copper(ii) oxide 30 Which two statements about alloys are correct? 1 lloys are formed by mixing two metals. 2 lloys do not conduct electricity. 3 toms in an alloy must all be the same size. 4 In an alloy there is metallic bonding. 1 and 2 1 and 4 2 and 3 3 and 4 31 powdered mixture of metals contains aluminium, calcium, silver and iron. Excess hydrochloric acid is added until no more mixture dissolves. What is the undissolved residue? aluminium calcium iron silver ULES /11/O/N/14

11 11 32 Iron rusts when exposed to oxygen in the presence of water. Which method will not slow down the rate of rusting of an iron roof? attaching strips of copper to it coating it with plastic galvanising it with zinc painting it 33 compound has the following structure. O O Which reactions will occur with this compound? 1 romine water will decolourise. 2 It will react with an alcohol to form an ester. 3 It will react with sodium metal. 1 only 1 and 2 only 1, 2 and 3 2 and 3 only 34 In the Periodic Table, how many periods are needed to accommodate the elements of atomic numbers 1-18? compound X has the molecular formula 4 8 O 2. It reacts with calcium carbonate to give carbon dioxide. What is X? O O O O 2 ULES /11/O/N/14 [Turn over

12 12 36 Methane is the first member of the alkane series of hydrocarbons. The second member is ethane. Which statements about ethane are correct? 1 Ethane has the formula Ethane has a higher boiling point than that of methane. 3 Ethane has the same molecular formula as methane. 4 Ethane has chemical properties very similar to those of methane. 1, 2 and 3 1 and 4 2 and 4 3 only 37 Which alkane, when any one hydrogen atom is substituted by a chlorine atom, will not produce isomers? 38 When ethanol reacts with ethanoic acid, the ester ethyl ethanoate is formed. 2 5 O + 3 O 2 3 O O What is the formula of the ester formed when methanol reacts with butanoic acid, 3 7 O 2? 2 5 O O O O 2 3 ULES /11/O/N/14

13 39 The table gives some statements about some macromolecules fats contain the linkage O O poly(ethene) is made by addition polymerisation starch can be hydrolysed to produce sugars Terylene is a naturally occurring polymer proteins contain the linkage O N Terylene is made by condensation polymerisation proteins can be hydrolysed to produce amino acids nylon is a man-made polymer Which pairs of statements are correct? 1 and 2 only 2 and 3 only 3 and 4 1, 2 and 3 40 Which of these compounds could react together to form a polymer? 1 2 N( 2 ) 6 N ( 2 ) 4 OO 3 OO( 2 ) 4 OO 4 2 N( 2 ) and 2 1 and 3 2 and 4 3 and 4 ULES /11/O/N/14

14 14 LNK PGE ULES /11/O/N/14

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

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level *6450598493* UNIVERSITY F MRIGE INTERNTINL EXMINTINS General ertificate of Education rdinary Level EMISTRY 5070/12 Paper 1 Multiple hoice May/June 2013 dditional Materials: Multiple hoice nswer Sheet Soft