# Physical Sciences Grade 12 P2 Free State Mock 2018 QP > Grade 12 Physical Sciences Paper 2 question paper from the Free State Mock Exam 2018, 22 pages. Read online or download the free PDF. - Page: https://www.hlayiso.com/library/fs-2018-paper-2/0524348f-7819-4a3a-847c-2e27be080aa0 - Updated: 2026-09-27 - Subject: Physical Sciences - Grade: Grade 12 - Document type: Question paper - Year: 2018 - Exam period: Free State Mock Exam - Paper: 2 - Curriculum: CAPS - Pages: 22 Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 12](https://www.hlayiso.com/library/grade-12) › [Physical Sciences](https://www.hlayiso.com/library/grade-12/physical-sciences) › [Physical Sciences Grade 12 P2 Free State Mock 2018 QP](https://www.hlayiso.com/library/fs-2018-paper-2/0524348f-7819-4a3a-847c-2e27be080aa0) ## About this document Physical Sciences · Grade 12 · Free State Mock Exam · 2018. Question paper, 22 pages. Read online or download the PDF. Read it free online on the page above; download the PDF from there. ## Document text Text extracted from the PDF. Layout, diagrams and tables may not survive extraction. ### Page 1 Downloaded from hlayiso.com 11 PREPARATORY EXAMINATION GRADE 12 PHYSICAL SCIENCES PAPER 2 (CHEMISTRY) SEPTEMBER 2018 MARKS: 150 TIME: 3 HOURS This question paper consists of 17 pages, 4 data sheets and a graph sheet. Copyright reserved Please turn over ### Page 2 Downloaded from hlayiso.com Physical Sciences P2 2 FS/September 2018 Grade 12 Prep. Exam. INSTRUCTIONS AND INFORMATION 1. Write your name and other applicable information in the appropriate spaces on the ANSWER BOOK and on the attached GRAPH SHEET. Place the GRAPH SHEET in your ANSWER BOOK and hand it in with your ANSWER BOOK. 2. The question paper consists of TEN questions. Answer ALL the questions in the ANSWER BOOK. Answer QUESTION 5.1.2 on the attached GRAPH SHEET. 3. Start EACH question on a NEW page in the ANSWER BOOK. 4. Number the answers correctly according to the numbering system used in this question paper. 5. Leave ONE line between two subquestions, for example between QUESTION 2.1 and QUESTION 2.2. 6. You may use a non-programmable pocket calculator. 7. You may use appropriate mathematical instruments. 8. You are advised to use the attached DATA SHEETS. 9. Show ALL formulae and substitutions in ALL calculations. 10. Round off your FINAL numerical answers to a minimum of TWO decimal places. 11. Give brief motivations, discussions, et cetera where required. 12. Write neatly and legibly. Copyright reserved Please turn over ### Page 3 Downloaded from hlayiso.com Physical Sciences P2 3 FS/September 2018 Grade 12 Prep. Exam. QUESTION 1: MULTIPLE-CHOICE QUESTIONS Four options are provided as possible answers to the following questions. Choose the answer and write only the letter (A – D) next to the question number (1.1 – 1.10) in your ANSWER BOOK, for example 1.11 E. 1.1 The diagram below represents an organic compound consisting of three different elements. The IUPAC name of this compound is ... A ethanol. B propanal. C ethanoic acid. D propan-2-one. . (2) 1.2 The structures of four organic compounds are shown below. Compound 1 Compound 2 Compound 3 Compound 4 H O H H H H H H H H C C O H C C H C C C H C C C H H H H H H H H H H Which of the above compounds will decolourise bromine water in a darkened room? A 2 and 3 B 1 and 2 C 3 and 4 D 2, 3 and 4 (2) Copyright reserved Please turn over ### Page 4 Downloaded from hlayiso.com Physical Sciences P2 4 FS/September 2018 Grade 12 Prep. Exam. 1.3 Which ONE of the following is a positional isomer of butan-1-ol? A H B H H H H H O H C C H H C C C C H H H H H H O C H H C H H H C H H D H H H H H C C H H C C C C H H H H H O H H C C O H H H H (2) 1.4 The graph below shows how the volume of carbon dioxide produced per minute varies with temperature during the fermentation of sugar. Volume of CO2 produced per minute 0 20 4060 80 Temperature (°C) Which ONE of the following statements is TRUE for this reaction? A The reaction rate is the lowest at 0 °C. B The reaction rate is the highest at 0 °C. C The rate of the reaction increases with temperature. D The rate of reaction reaches a maximum at about 40 °C. (2) Copyright reserved Please turn over ### Page 5 Downloaded from hlayiso.com Physical Sciences P2 5 FS/September 2018 Grade 12 Prep. Exam. 1.5 Consider the equation for a hypothetical reaction below. A(g) + B(g) ⇌ AB(g) At 70 °C, the heat of reaction (∆H) for this reaction is - 30 kJ·mol-1. At a temperature of 90 °C, the heat of reaction (∆H), in kJ·mol-1, is: A - 30 B - 10 C + 50 D - 50 (2) 1.6 The graph below represents the decomposition of N2O4(g) in a closed container according to the following equation: N2O4(g) ⇌ 2NO2(g) Concentration (mol·dm-3) [N2O4] [NO2] t1 Time (s) Which ONE of the following correctly describes the situation at t1? A The N2O4 gas is used up. B The NO2 gas is used up. C The rate of the forward reaction equals the rate of the reverse reaction. D The concentrations of the reactant and the product are equal. (2) Copyright reserved Please turn over ### Page 6 Downloaded from hlayiso.com Physical Sciences P2 6 FS/September 2018 Grade 12 Prep. Exam. 1.7 According to the Arrhenius theory, an acid ... A is a proton donor. B is a proton acceptor. C forms hydroxide ions in water. D forms hydronium ions in water. (2) 1.8 The reactions below occur in two different electrochemical cells X and Y. Cell X: CuCℓ2(aq) → Cu(s) + Cℓ2(g) Cell Y: Zn(s) + CuSO4(aq) → Cu(s) + ZnSO4(aq) Which ONE of the following CORRECTLY gives the products formed at the CATHODE in each of these cells? Cell X Cell Y A Cℓ2(g) Cu(s) B Cu(s) Cu(s) C Cℓ2(g) ZnSO4(aq) D Cu(s) ZnSO4(aq) (2) 1.9 Which ONE of the reactions below occurs when ammonium nitrate is prepared from nitric acid? A Oxidation B Acid-base C Decomposition D Condensation (2) Copyright reserved Please turn over ### Page 7 Downloaded from hlayiso.com Physical Sciences P2 7 FS/September 2018 Grade 12 Prep. Exam. 1.10 The information appearing on a 50 kg bag of fertiliser is shown below: 3 : 2 : 3 (21) Which ONE of the following can be deduced from the above information? The bag contains ... A 21% filler. B 3 kg nitrogen. C 79% fertiliser. D 21% fertiliser. (2) [20] Copyright reserved Please turn over ### Page 8 Downloaded from hlayiso.com Physical Sciences P2 8 FS/September 2018 Grade 12 Prep. Exam. QUESTION 2 (Start on a new page.) The letters A to G in the table below represent seven organic compounds. H O H H A Butane B H C C C C H H H H C Methyl propanoate D Ethanol H H H C C C C H E CH2CHCH2CH3 F H H C H H G Ethene Use the table to answer the questions that follow. 2.1 Write down the letter(s) representing the following: 2.1.1 A saturated hydrocarbon (1) 2.1.2 TWO compounds with dipole-dipole forces between molecules (1) 2.2 Compound A has a chain isomer. 2.2.1 Define a chain isomer. (2) 2.2.2 Write down the structural formula of a chain isomer of compound A. (2) 2.3 Compound E is one of the products formed during a cracking reaction of compound A. Write down the molecular formula of the other product formed during this reaction. (1) 2.4 Write down the IUPAC name of: 2.4.1 A functional isomer of compound B (1) 2.4.2 Compound F (2) 2.5 Use structural formulae to write a balanced equation for the preparation of compound C from an alcohol and another organic compound. (4) Copyright reserved Please turn over ### Page 9 Downloaded from hlayiso.com Physical Sciences P2 9 FS/September 2018 Grade 12 Prep. Exam. 2.6 Draw TWO structural formulae of compound D. Use a dotted line to represent the hydrogen bonding between the two structural formulae. (2) 2.7 Compound G is used in the preparation of polyethene. 2.7.1 Name the type of reaction that takes place. (1) 2.7.2 Using structural formulae, write down a balanced equation for this preparation. (3) [20] QUESTION 3 (Start on a new page.) The boiling points of five (5) organic compounds (A to E) are determined and the results are shown in the table below. MOLAR MASS BOILING POINT IUPAC NAME (g·mol-1) (°C) A 1-chloropropane 78,5 47 B 1-chlorobutane 92,5 78 C 2-chlorobutane 92,5 70 D 1-chloro-2-methylpropane 92,5 N E 2-chloro-2-methylpropane 92,5 51 3.1 Write down the homologous series to which compounds A to E belong. (1) 3.2 Compound B has a higher boiling point than compound A. 3.2.1 Name the intermolecular force responsible for this difference. (1) 3.2.2 Fully explain this difference in boiling point. (3) 3.3 Compounds B and C are structural isomers. Name the type of structural isomer of which they are an example. (1) 3.4 Compound D has an unknown boiling point indicated as N. 3.4.1 Predict the boiling point of compound D. Choose from the boiling points listed below. 45 °C 69 °C 80 °C (1) 3.4.2 Fully explain how you arrived at the answer to QUESTION 3.4.1. (4) [11] Copyright reserved Please turn over ### Page 10 Downloaded from hlayiso.com Physical Sciences P2 10 FS/September 2018 Grade 12 Prep. Exam. QUESTION 4 (Start on a new page.) The flow diagram below shows how prop-1-ene can be used to prepare other organic compounds. V, W, X, Y and Z represent organic reactions. V X HX Compound B Prop-1-ene Bromoalkane H2 Y H2O W Z Compound A 4.1 Write down the letter (V, W, X, Y or Z) that represents each of the following reactions: 4.1.1 Hydrolysis (1) 4.1.2 Dehydrogenation (1) 4.1.3 Halogenation (1) 4.1.4 Dehydrobromination (1) 4.2 Write down the IUPAC name of: 4.2.1 Compound A (major product) (1) 4.2.2 Compound B (1) 4.3 Compare the reaction conditions for reaction Y and reaction Z by stating the following: 4.3.1 ONE similarity (1) 4.3.2 TWO differences (2) 4.4 Using structural formulae, write down a balanced equation for the preparation of the bromoalkane from prop-1-ene. (3) [12] Copyright reserved Please turn over ### Page 11 Downloaded from hlayiso.com Physical Sciences P2 11 FS/September 2018 Grade 12 Prep. Exam. QUESTION 5 (Start on a new page.) ANSWER QUESTION 5.1.2 ON THE ATTACHED GRAPH SHEET. 5.1 The reaction of sodium thiosulphate (Na2S2O3) and hydrochloric acid (HCℓ) is used to investigate one of the factors that influences reaction rate. The balanced equation for the reaction is: Na2S2O3(aq) + 2HCℓ(aq) → 2NaCℓ(aq) + H2O(ℓ) + SO2(g) + S(s) In the first experiment, 25 cm3 of the sodium thiosulphate solution is added to 10 cm3 of a dilute hydrochloric acid solution in a flask that is placed over a cross drawn on a sheet of white paper. The time taken for the cross to become invisible, when viewed from the top, is 1 determined to calculate the reaction rate as . reaction time The experiment is then repeated five times with different volumes of the sodium thiosulphate solution. The conditions used and results obtained are shown in the table below. 1 Volume Volume of Volume Reaction reaction time Experiment of HCℓ Na2S2O3 of H2O time (cm3) (cm3) (cm3) (s) (s-1) 1 10 25 0 7,7 0,130 2 10 20 5 9,5 0,104 3 10 15 10 12,8 0,078 4 10 10 15 20,0 0,052 5 10 5 20 42,6 0,026 5.1.1 For this investigation, write down the: (a) The independent variable without referring to volume (1) (b) Purpose of the water used in the investigation (1) 5.1.2 Draw a graph of volume of Na2S2O3(aq) versus reaction rate, in s-1, on the attached GRAPH SHEET. (ATTACH THIS GRAPH SHEET TO YOUR ASNWER BOOK.) (3) 5.1.3 Use the graph in QUESTION 5.1.2 to determine the volume of Na2S2O3(aq) that should be used to obtain a reaction time of 11 s. USE A DOTTED LINE ON THE GRAPH AND A CALCULATION TO SHOW HOW YOU ARRIVED AT THE ANSWER. (3) Copyright reserved Please turn over ### Page 12 Downloaded from hlayiso.com Physical Sciences P2 12 FS/September 2018 Grade 12 Prep. Exam. 5.1.4 How does the rate of reaction in experiment 1 compare to that in experiment 5. Write down HIGHER THAN, LOWER THAN or EQUAL TO. Use the collision theory to explain the answer. (3) 5.2 Consider a hypothetical reaction below: A(aq) + BC(aq) ⇌ AB(aq) + C(aq) The sketch graph, not drawn to scale, of potential energy versus course of reaction was obtained for the reaction. 185 Potential energy (kJ•mol-1) 20 0 Course of reaction 5.2.1 Define activation energy. (2) 5.2.2 Write down the: (a) Heat of reaction for the forward reaction (1) (b) Activation energy for the reverse reaction (1) 5.2.3 Is the FORWARD or the REVERSE reaction an endothermic reaction? (1) [16] Copyright reserved Please turn over ### Page 13 Downloaded from hlayiso.com Physical Sciences P2 13 FS/September 2018 Grade 12 Prep. Exam. QUESTION 6 (Start on a new page.) Ammonium chloride (NH4Cℓ) decomposes in a closed container at 340 °C according to the following balanced equation: NH4Cℓ(s) ⇌ NH3(g) + HCℓ(g) 6.1 What is the meaning of the double arrow in the above equation? (1) 6.2 The graph below, not drawn to scale, shows how the amount of NH4Cℓ(s) in the container changes with time at 340 °C. 10,7 Mass (g) 8,1 Time (minutes) Equilibrium is reached at 340 °C. Calculate the equilibrium constant, Kc, at this temperature. The volume of the container is 500 cm3. (8) 6.3 It is found that the Kc value increases when the temperature is increased. Is the forward reaction EXOTHERMIC or ENDOTHERMIC? Fully explain the answer. (3) 6.4 The pressure is now increased, by decreasing the volume at constant temperature. How will each of the following be affected? Choose from INCREASES, DECREASES or REMAINS THE SAME. 6.4.1 The Kc value (1) 6.4.2 The number of moles of NH4Cℓ(s) present in the equilibrium mixture (1) 6.4.3 The concentration of NH3(g) at equilibrium (1) [15] Copyright reserved Please turn over ### Page 14 Downloaded from hlayiso.com Physical Sciences P2 14 FS/September 2018 Grade 12 Prep. Exam. QUESTION 7 (Start on a new page.) 7.1 A learner determines the pH of a number of dilute solutions of acids and bases. The following results are obtained at 25 °C: Solution pH Phosphoric acid 2 Orange juice 3,3 Potassium hydroxide 12 7.1.1 Explain the difference between a DILUTE base and a CONCENTRATED base. (2) 7.1.2 Which ONE of the above solutions contains the highest concentration of hydronium ions? (1) 7.1.3 Will the pH of the orange juice at 25 °C INCREASE, DECREASE or REMAIN THE SAME when: (a) Distilled water is added to it (1) (b) Some of the potassium hydroxide is added to it (1) 7.2 The learner adds 0,12 g of magnesium hydroxide, Mg(OH)2(s), to 500 cm3 of the phosphoric acid solution, H3PO4(aq) of pH = 2. The phosphoric acid solution is in excess. The balanced equation for the reaction is: 3Mg(OH)2 + 2H3PO4 → Mg3(PO4)2 + 6H2O 7.2.1 Calculate the initial number of moles of phosphoric acid in the solution. (5) 7.2.2 The excess H3PO4 is how titrated with a sodium hydroxide solution, NaOH(aq), of unknown concentration. It is found that 25 cm3 of the NaOH(aq) neutralises 14 cm3 of the H3PO4(aq). The balanced equation for the reaction is: 3NaOH(aq) + H3PO4(aq) → Na3PO4(aq) + 3H2O(ℓ) Calculate the concentration of the NaOH(aq). (7) [17] Copyright reserved Please turn over ### Page 15 Downloaded from hlayiso.com Physical Sciences P2 15 FS/September 2018 Grade 12 Prep. Exam. QUESTION 8 (Start on a new page.) The diagram below represents an electrochemical cell which functions under standard conditions. V Zn Ag Zn2+(aq) Ag+(aq) 8.1 Which type of electrochemical cell, ELECTROLYTIC or GALVANIC, is represented above? (1) 8.2 Which electrode, Zn or Ag, is the cathode? (1) 8.3 Write down the half-reaction that takes place in the zinc half-cell. (2) 8.4 How will the concentration of Zn2+ ions be affected when the cell is functioning? Write down only INCREASES, DECREASES or REMAINS THE SAME. (1) 8.5 After the cell has been operating for a period of time, the gain in mass at the cathode is 2,16 g. Calculate the loss in mass at the anode. (4) 8.6 The Ag+ǀ Ag half-cell is now replaced by a H+ ǀ H2 half-cell. 8.6.1 Which standard condition, not applicable to the zinc-silver cell, is applicable to this cell? (1) 8.6.2 Write down the cell notation for this cell. (3) 8.6.3 Calculate the initial emf of this cell under standard conditions. (4) [17] Copyright reserved Please turn over ### Page 16 Downloaded from hlayiso.com Physical Sciences P2 16 FS/September 2018 Grade 12 Prep. Exam. QUESTION 9 (Start on a new page.) The simplified diagram below represents a cell used for the electrolysis of a concentrated sodium chloride solution. Both P and Q are inactive electrodes. Electrode P Electrode Q Concentrated sodium chloride solution 9.1 Define electrolysis. (2) 9.2 Which half-reaction (OXIDATION or REDUCTION) takes place at electrode P? (1) 9.3 Define a reducing agent in terms of electron transfer. (2) 9.4 Write down the NAME or FORMULA of the reducing agent in the above cell. (1) 9.5 Write down the half-reaction that takes place at electrode Q. (2) 9.6 Write down the NAME or FORMULA of a substance that can be used as electrodes P and Q. (1) [9] Copyright reserved Please turn over ### Page 17 Downloaded from hlayiso.com Physical Sciences P2 17 FS/September 2018 Grade 12 Prep. Exam. QUESTION 10 (Start on a new page.) 10.1 The flow diagram below shows the processes involved in the industrial preparation of fertiliser G. B C Haber process D Process F Sulphuric acid Fertiliser G Write down the: 10.1.1 Balanced equation for the preparation of substance D (3) 10.1.2 Name of process F (1) 10.1.3 Balanced equation for the preparation of fertiliser G (3) 10.2 A park owner stores 2 kg bags of fertiliser R with ratio 4:6:8 (30) and fertiliser S with ratio 13:5:8 (30). He wants to grow shade trees. 10.2.1 Which ONE of the above fertilisers, R or S, must he use to obtain trees with enough shade? (1) 10.2.2 Give a reason for the answer to QUESTION 10.2.1. (2) 10.2.3 Calculate the mass of filler in fertiliser R. (3) [13] TOTAL: 150 Copyright reserved Please turn over ### Page 18 Downloaded from hlayiso.com Physical Sciences P2 FS/September 2018 Grade 12 Prep. Exam. DATA FOR PHYSICAL SCIENCES GRADE 12 PAPER 2 (CHEMISTRY) GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 12 VRAESTEL 2 (CHEMIE) TABLE 1: PHYSICAL CONSTANTS / TABEL 1: FISIESE KONSTANTES NAME/NAAM SYMBOL/SIMBOOL VALUE/WAARDE Standard pressure Standaarddruk pθ 1,013 x 105 Pa Molar gas volume at STP Vm 22,4 dm3·mol-1 Molêre gasvolume by STD Standard temperature Tθ 273 K Standaardtemperatuur Charge on electron e -1,6 x 10-19 C Lading op elektron Avogadro's constant NA 6,02 x 1023 mol-1 Avogadro-konstante TABLE 2: FORMULAE / TABEL 2: FORMULES m N n= n= M NA n m V c= or/of c= n= V MV Vm c a v a na = pH = -log[H3O+] c b v b nb Kw = [H3O+][OH-] = 1 x 10-14 at/by 298 K Eθcell = Eθcathode − Eθanode / Eθsel = Ekatode θ − Eθanode or/of Eθcell = Ereduction θ − Eθoxidation/ Eθsel = Ereduksie θ − Eθoksidasie or/of Eθcell = Eθoxidisingagent − Ereducingagent / Esel = Eoksideermi ddel − Ereduseermi θ θ θ θ ddel Copyright reserved Please turn over ### Page 19 Physical Sciences P2 Downloaded from hlayiso.com FS/September 2018 Grade 12 Prep. Exam. TABLE 3: THE PERIODIC OF ELEMENTS/TABEL 3: DIE PERIODIEKE TABEL VAN ELEMENTE Copyright reserved Please turn over ### Page 20 Downloaded from hlayiso.com Physical Sciences P2 FS/September 2018 Grade 12 Prep. Exam. TABLE 4A: STANDARD REDUCTION POTENTIALS TABEL 4A: STANDAARD-REDUKSIEPOTENSIALE Half-reactions / Halfreaksies (V) F2(g) + 2e− ⇌ 2F− + 2,87 3+ − 2+ Co +e ⇌ Co + 1,81 H2O2 + 2H +2e− + ⇌ 2H2O +1,77 + − 2+ MnO + 8H + 5e ⇌ Mn + 4H2O + 1,51 − − Cℓ2(g) + 2e ⇌ 2Cℓ + 1,36 + − 3+ Cr2O + 14H + 6e ⇌ 2Cr + 7H2O + 1,33 + − O2(g) + 4H + 4e ⇌ 2H2O + 1,23 MnO2 + 4H + 2e− + 2+ ⇌ Mn + 2H2O + 1,23 2+ − Pt + 2e ⇌ Pt + 1,20 Br2(ℓ) + 2e− ⇌ 2Br− + 1,07 + 4H + 3e− + NO ⇌ NO(g) + 2H2O + 0,96 + 2e− 2+ Hg ⇌ Hg(ℓ) + 0,85 + − Ag + e ⇌ Ag + 0,80 + − Increasing oxidising ability / Toenemende oksiderende vermoë Increasing reducing ability / Toenemende reduserende vermoë NO + 2H + e ⇌ NO2(g) + H2O + 0,80 3+ − 2+ Fe +e ⇌ Fe + 0,77 + − O2(g) + 2H + 2e ⇌ H2O2 + 0,68 − − I2 + 2e ⇌ 2I + 0,54 Cu + e− + ⇌ Cu + 0,52 + − SO2 + 4H + 4e ⇌ S + 2H2O + 0,45 2H2O + O2 + 4e− ⇌ 4OH− + 0,40 + 2e− 2+ Cu ⇌ Cu + 0,34 + − SO + 4H + 2e ⇌ SO2(g) + 2H2O + 0,17 2+ − + Cu +e ⇌ Cu + 0,16 + 2e− 4+ 2+ Sn ⇌ Sn + 0,15 S + 2H + 2e− + ⇌ H2S(g) + 0,14 2H + 2e− + ⇌ H2(g) 0,00 − − 0,06 3+ Fe + 3e ⇌ Fe + 2e− − 0,13 2+ Pb ⇌ Pb − − 0,14 2+ Sn + 2e ⇌ Sn + 2e− − 0,27 2+ Ni ⇌ Ni + 2e− − 0,28 2+ Co ⇌ Co − − 0,40 2+ Cd + 2e ⇌ Cd + e− 2+ − 0,41 3+ Cr ⇌ Cr − − 0,44 2+ Fe + 2e ⇌ Fe + 3e− − 0,74 3+ Cr ⇌ Cr − − 0,76 2+ Zn + 2e ⇌ Zn 2H2O + 2e− ⇌ H2(g) + 2OH− − 0,83 − − 0,91 2+ Cr + 2e ⇌ Cr + 2e− − 1,18 2+ Mn ⇌ Mn − − 1,66 3+ Aℓ + 3e ⇌ Aℓ + 2e− − 2,36 2+ Mg ⇌ Mg − − 2,71 + Na + e ⇌ Na + 2e− − 2,87 2+ Ca ⇌ Ca Sr + 2e− − 2,89 2+ ⇌ Sr − − 2,90 2+ Ba + 2e ⇌ Ba + - Cs + e ⇌ Cs - 2,92 − − 2,93 + K +e ⇌ K Li + e− − 3,05 + ⇌ Li Copyright reserved Please turn over Text truncated here. 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