CHEMISTRY 5070/12 Paper 1 Multiple Choice October/November 2017

Transcription

1 ambridge International Examinations ambridge Ordinary Level * * EMISTRY 5070/12 Paper 1 Multiple hoice October/November 2017 dditional Materials: RE TESE INSTRUTIONS 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. 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. I17 11_5070_12/5RP ULES 2017 [Turn over

2 2 1 mixture of sand and sodium chloride can be separated in three steps. Step 1 is to add water to the mixture. The diagram shows step 2 and step 3. Where is pure sodium chloride collected? filter paper and funnel evaporating dish heat step 2 step 3 2 The results of two tests on solution X are shown. reagent added observation on adding a few drops of reagent observation on adding an excess of reagent aqueous sodium hydroxide white precipitate precipitate dissolves aqueous ammonia white precipitate precipitate remains Which ion is present in solution X? l 3+ a 2+ u 2+ Zn 2+ 3 Which diagram shows the arrangement of particles inside a balloon containing a mixture of the gases nitrogen and oxygen? key nitrogen atom oxygen atom ULES /12/O/N/17

3 3 4 student follows the rate of the reaction between marble chips, ao 3, and dilute hydrochloric acid. ao 3 + 2l al 2 + O O Which diagrams show apparatus that is suitable for this experiment? hydrochloric acid marble chips 1 2 measuring cylinder water hydrochloric acid marble chips balance loose plug 3 4 hydrochloric acid burette hydrochloric acid burette gas syringe marble chips marble chips 1 and 2 only 1 and 3 1 and 4 only 1, 2 and 4 ULES /12/O/N/17 [Turn over

4 4 5 chemist wishes to separate and identify a mixture of substances using paper chromatography. The diagram shows the apparatus used. The solvent is water. solvent The solvent front is allowed to reach the top of the paper before the chemist removes the paper from the solvent. Which problem does this cause? This causes the spot nearest the bottom of the paper to catch up with the spot above it. This makes it impossible to calculate R f values. This makes it impossible to use a locating agent. This results in a safety hazard caused by solvent fumes. 6 Which particle contains the same number of both neutrons and electrons? a Mg 19 F S 7 Which statement is correct for all metals? They are hard and brittle. They are made up of a lattice of positive and negative ions. They conduct electricity by movement of electrons. They conduct electricity by movement of ions. ULES /12/O/N/17

5 5 8 X represents the element of atomic number 8 and Y represents the element of atomic number 19. The two elements react together to form a compound. Which row is correct for the compound formed? formula type of bonding Y 2 X covalent Y 2 X ionic X 2 Y covalent X 2 Y ionic 9 The empirical formula of a liquid compound is 2 4 O. To find the empirical formula, it is necessary to know the density of the compound. the percentage composition by mass of the compound. the relative molecular mass of the compound. the volume occupied by 1 mole of the compound g of hydrated copper(ii) sulfate crystals are heated to produce anhydrous copper(ii) sulfate and water vapour. uso O(s) uso 4 (s) O(g) What is the mass of anhydrous copper(ii) sulfate formed? [M r : uso 4, 160; 2 O, 18] 9.0 g 16.0 g 22.5 g 25.0 g 11 Which sample contains the most atoms? 0.5 moles of water 1.0 moles of carbon dioxide 1.0 moles of methane 2.0 moles of hydrogen chloride 12 The relative atomic mass of chlorine is What is the mass of 2 moles of chlorine gas? g 35.5 g 71 g 142 g ULES /12/O/N/17 [Turn over

6 6 13 One mole of an organic compound, Q, is completely burnt in oxygen and produces exactly three moles of water. Which compound is Q? butane, 4 10 ethanol, 2 5 O propane, 3 8 propanol, 3 7 O 14 In an experiment, 1 mol of powdered copper and 1 mol of powdered zinc are placed in a flask. ilute acid, containing 1 mol of acid, is added to the flask. The flask is left until all the reactions, if any, are complete. Which diagram shows the result of the experiment? colourless neutral solution 1 mol of copper blue neutral solution 0.5 mol of copper mol of zinc blue neutral solution 1 mol of zinc colourless acidic solution 1 mol of copper + 1 mol of zinc ULES /12/O/N/17

7 7 15 simple cell can be made using two different metals as the electrodes and an aqueous solution as the electrolyte. Which statements about simple cells are correct? 1 greater voltage is produced using magnesium and silver than using magnesium and copper. 2 The electrolyte is an aqueous solution containing both positive and negative ions. 3 The more reactive metal will release electrons. 1, 2 and 3 1 and 3 only 1 only 2 and 3 only 16 Magnesium can be produced by electrolysis of molten magnesium chloride, Mgl 2. What are the equations for the reactions that occur at the positive electrode and at the negative electrode? positive electrode negative electrode 2l l 2 + 2e e 2 l 2 + 2e 2l Mg e Mg 2l l 2 + 2e Mg e Mg 2l l 2 + 2e Mg e 2Mg 17 Three different solutions were electrolysed using inert electrodes. solution 1 solution 2 solution 3 aqueous sodium chloride concentrated hydrochloric acid dilute sulfuric acid Which solutions produce hydrogen at the negative electrode? 1, 2 and 3 1 and 2 only 1 only 2 and 3 only 18 ompound Y reacts with oxygen. This reaction has a positive enthalpy change of reaction,. What information can be deduced about Y and its reaction with oxygen? ompound Y can be used as a fuel. ompound Y could be a hydrocarbon. In the reaction the energy needed to break bonds is greater than the energy released when bonds are made. In the reaction the products are at a lower energy level than the reactants. ULES /12/O/N/17 [Turn over

8 8 19 The formation of liquid water from hydrogen and oxygen may occur in three stages (g) + O 2 (g) 4(g) + 2O(g) 2 4(g) + 2O(g) 2 2 O(g) O(g) 2 2 O(I) Which stages are endothermic? 1, 2 and 3 1 only 2 only 3 only 20 Sulfur trioxide is produced by the following reaction. 2SO 2 (g) + O 2 (g) 2SO 3 (g) = 195 kj Which change in conditions would produce a greater amount of SO 3 at equilibrium? adding a catalyst increasing the pressure increasing the temperature removing some SO 2 and O 2 ULES /12/O/N/17

9 9 21 Magnesium reacts with dilute sulfuric acid. Two experiments were carried out. Mg(s) + 2 SO 4 (aq) MgSO 4 (aq) + 2 (g) experiment 1 experiment g of magnesium was reacted with 100 cm 3 of 1.0 mol / dm 3 sulfuric acid g of magnesium was reacted with 50 cm 3 of 2.0 mol / dm 3 sulfuric acid. In each experiment the volume of hydrogen was measured at various times. The results were plotted on a graph. Which graph is correct? volume of hydrogen volume of hydrogen key experiment 1 experiment time 0 0 time volume of hydrogen volume of hydrogen 0 0 time 0 0 time 22 Which statement is correct for both aluminium and iron? oth form 2+ ions. oth have amphoteric oxides. The manufacture of both metals involves the reduction of the metal ions. They are both normally manufactured by electrolysis. ULES /12/O/N/17 [Turn over

10 10 23 household cleaning compound is used to remove calcium carbonate from bathroom surfaces. The compound reacts with the calcium carbonate to form a soluble salt, carbon dioxide and water. What is the p of this cleaning compound? p 2 p 7 p 10 p ilute hydrochloric acid is added separately to samples of copper, copper(ii) oxide and copper(ii) carbonate. Which row correctly shows whether copper(ii) chloride is produced? u uo uo 3 key = copper(ii) chloride produced = copper(ii) chloride not produced 25 Which ions are present when hydrochloric acid has exactly neutralised aqueous sodium hydroxide? Na +, l, + and O Na +, l and + only Na + and l only + and O only 26 Which experiment will result in the formation of a white precipitate? aqueous barium nitrate added to aqueous sodium chloride aqueous sodium carbonate added to aqueous calcium chloride carbon dioxide passed through aqueous potassium chloride dilute hydrochloric acid added to aqueous ammonia 27 Which statement about both the Group I and Group VII elements is correct? They conduct electricity when molten. They form covalent compounds when bonded to non-metals. They exist as diatomic molecules. When Group I elements combine with Group VII elements, ionic compounds form. ULES /12/O/N/17

11 11 28 The elements helium, argon and neon are noble gases. Which statement is correct? ll these elements have eight electrons in their outer shell. rgon is used to react with impurities in the manufacture of steel. elium is used in balloons as it is more dense than air. Neon is used in light bulbs to give an inert atmosphere. 29 Which row shows the correct catalyst for each industrial process? manufacture of sulfuric acid manufacture of ammonia manufacture of margarine nickel iron vanadium(v) oxide nickel vanadium(v) oxide iron vanadium(v) oxide iron nickel vanadium(v) oxide nickel iron 30 In the solid state, germanium has the same structure as diamond. What is the likely melting point of germanium? above 800 between 100 and below luminium is a metal that is often used to make caps for bottles. When thrown away and buried in the soil, the caps do not corrode. Why is this? luminium does not react with acids. luminium does not react with alkalis. luminium is alloyed with other metals. luminium is protected by a layer of oxide. ULES /12/O/N/17 [Turn over

12 12 32 Which statement about Group I metals is correct? They are hard compared with most other metals. They form coloured compounds. They have high densities compared with most other metals. They only form ions with a charge of F compounds were used as aerosol propellants. The structure of one F compound is shown. F l F F Which element in this compound causes a depletion of ozone in the atmosphere? carbon chlorine fluorine hydrogen 34 ry air is a mixture of gases of which 99% is nitrogen and oxygen. What is the main constituent of the remaining 1%? argon helium hydrogen water vapour 35 Why is chlorine added to the water supply? hlorine is used to desalinate the water. hlorine kills bacteria that may be present in the water. hlorine precipitates solids that may be present in the water. hlorine removes tastes and odours from the water. ULES /12/O/N/17

13 13 36 When the alcohol of molecular formula 4 10 O is oxidised, what is the molecular formula of the acid formed? 4 12 O O O O 2 37 The diagrams show the structures of five hydrocarbons Which three hydrocarbons are isomers of each other? 1, 2 and 4 2, 3 and 5 2, 3 and 4 3, 4 and 5 38 Which alcohol and acid will react together to make the ester 3 OO 2 5? 3 O and 3 OO 3 O and 2 5 OO 2 5 O and 3 OO 2 5 O and 2 5 OO ULES /12/O/N/17 [Turn over

14 39 Which compound has a p of less than 7 in aqueous solution? 14 O O O O O O O O 40 Which statement about polymers is correct? Nylon and Terylene are produced by addition polymerisation. Nylon and Terylene both contain the amide linkage. Simple sugars can be produced by hydrolysing proteins. Starch contains the elements carbon, hydrogen and oxygen. ULES /12/O/N/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/O/N/17

16 16 ULES /12/O/N/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