Kimia SBP SPM 2007
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Soalan percubaan Kimia SBP SPM 2007

Soalan percubaan Kimia SBP SPM 2007

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Kimia SBP SPM 2007 Kimia SBP SPM 2007 Document Transcript

  • SULIT 4541/1 Kimia Kertas 1 Ogos 2007 1¼ jam 4541/1 BAHAGIAN SEKOLAH KEMENTERIAN PELAJARAN MALAYSIA ______________________________________________ PEPERIKSAAN PERCUBAAN SPM 2007 http://cikguadura.wordpress.com/ KIMIA Kertas 1 Satu jam lima belas minit JANGAN BUKA KERTAS SOALAN INI HINGGA DIBERITAHU 1. 2. 3. 4. 5. 6. 7. Kertas soalan ini mengandungi 50 soalan. Jawab semua soalan Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan Bagi setiap soalan hitamkan satu ruangan sahaja Sekiranya anda hendak menukar jawapan, padamkan tanda yang telah dibuat. Kemudian hitamkan jawapan yang baru. Rajah yang mengiringi soalan tidak dilukiskan mengikut skala. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan. Kertas soalan ini mengandungi 19 halaman bercetak 4541/1 [Lihat sebelah SULIT
  • SULIT 1 Which of the following processes, proved the kinetic theory of matter? A B C D 2 proton number nucleon number relative atomic mass relative molecular mass Which of the following substances is a covalent compound? A B C D 5 NH4SO4 (NH4)2SO4 (NH3)2SO4 (NH4)3(SO4)2 Elements in the Periodic Table are arranged according to an increase in A B C D 4 Diffusion Photosynthesis Respiration Neutralization Which of the following is a chemical formula of ammonium sulphate? A B C D 3 4541/1 Copper Ammonia Lead(II) oxide Sodium chloride Which of the following substances is an electrolyte? A B C D 4541/1 Hydrogen chloride in methyl benzene Molten aluminium oxide Glucose solution Copper(II) carbonate powder 2 [Lihat sebelah SULIT
  • SULIT 6 Which of the following statements is true about alkali? A B C D 7 Weak alkali is an alkali that undergoes high rate of ionization. Strong alkali has low pH value Alkalis are bases that are soluble in water. Alkalis are not corrosive Which of the following is a soluble salt? A B C D 8 4541/1 Lead(II) iodide Copper(II) carbonate Barium sulphate Sodium hypochlorite The body of the car shown in the diagram below is made of alloy T. Alloy T What is alloy T? A B C D 4541/1 Steel Brass Bronze Duralumin 3 [Lihat sebelah SULIT
  • SULIT 9 4541/1 Which of the homologous series is correctly paired to its functional group? Homologous series A Alkene C Alcohol D 10 Ester B Functional groups Carboxylic acid Which of the following statements correctly explains the meaning of effective collision? A B C D 11 The collision which takes place before reaction. The collision where its energy is less than the activation energy. The collision that can causes reaction. The collision that has the highest energy.    Bromine water Acidified potassium manganate(VII) Acidified potassium dichromate(VI) Which of the following is true about the substances? A B C D 4541/1 Reducing agent Oxidising agent Dehydration agent Hydration agent 4 [Lihat sebelah SULIT
  • SULIT 12 Which of the following processes occurs when ice changes to water ? A B C D 13 Endothermic Exothermic Neutralization Freezing Paracetamol is used for A B C D 14 4541/1 reducing pain reducing anxiety destroying of bacteria controlling the level of glucose in blood The diagram below shows the molecular formula of glucose. C6H12O6 What is the empirical formula for glucose? A B C D 15 CH2O CH2O2 C2H4O2 C6H12O6 7 Which of the following is the atomic structure of lithium atom, 3Li ? A B 3p 3p C D 4p 4541/1 4p 5 [Lihat sebelah SULIT
  • SULIT 16 4541/1 The figure shows three elements in Period 3 of the Periodic Table. X Y Z Which of the following is true about the properties of oxide formed? A B C D 17 Which of the following substances is made up of ions? A B C D 18 Sulphur Naphthalene Sulphur trioxide Potassium chloride Which of the following ions are present in copper(II) sulphate solution? A B C D 19 The oxide of Z is basic The oxide of Y is acidic The formula of oxide Y is YO The oxide of X reacts with an acid to form salt and water Hydrogen ions and hydroxide ions Copper(II) ions and sulphate ions Copper(II) ions ,hydrogen ions, suphide ions and oxide ions Copper(II) ions, hydrogen ions, sulphate ions and hydroxide ions Dry hydrogen chloride gas is passed through methyl benzene for a few minutes. Which of the following statements is true about the liquid produced? I II III IV it has a pH value of less than 7 it consists of hydrogen chloride molecules it changes blue litmus to red it does not conduct electric current A B C D I and III only II and IV only I, II and III only IV only 4541/1 6 [Lihat sebelah SULIT
  • SULIT 20 4541/1 The diagram shows part of a polymer molecule CH3 H CH3 H CH3 H C C C C C C H H H H H H Which is its monomer? A C 21 B D Nitric acid will change to nitrate salt when hydrogen ions are replaced by I II III IV copper ion hydroxide ion carbonate ion ammonium ion A B C D I and II only I and IV only II and IV only I, III and IV only 4541/1 7 [Lihat sebelah SULIT
  • SULIT 22 4541/1 The graph shows the volume of carbon dioxide gas produced against time for the reaction of calcium carbonate and sulphuric acid. Volume of CO2 gas / cm3 Time / second The gradient of the graph decreases with time because A B C D 23 catalyst is not used volume of mixture decreases temperature of reaction decreases concentration of sulphuric acid decreases The equation below shows a chemical reaction. Based on the equation given, name the reaction. A B C D 4541/1 Hydrogenation Polymerization Halogenation Substitution 8 [Lihat sebelah SULIT
  • SULIT 24 4541/1 The diagram below shows the electrolysis process of copper(II) sulphate solution using copper as an electrode. Copper Copper(II) sulphate solution H = +181 kJ Which of the following substances are oxidized and reduced in this cell? Oxidised A B C D 25 Reduced Hydroxide ion Hydroxide ion Copper atom Copper atom Copper(II) ion Copper atom Copper(II) ion Hydrogen ion The reaction between nitrogen and oxygen can be represented by the following equation: N2 (g) + O2(g)  2NO(g) H = +181 kJ Which of the following energy level diagrams represent the above reaction? A B Energy N2 (g) + O2(g) Energy 2NO(g) H = +181 kJ H = +181 kJ 2NO(g) C N2 (g) + O2(g) D Energy Energy 2NO(g) N2 (g) + O2(g) H = +181 kJ H = +181 kJ N2 (g) + O2(g) 4541/1 2NO(g) 9 [Lihat sebelah SULIT
  • SULIT 26 4541/1 The diagram shows a label on a bottle of orange juice. SUKARAMAI ORANGE JUICE Ingredients: water, sugar, X , sulphur dioxide, aspartame, vitamin A and D X is one of the important ingredients to make orange juice last longer. What is X? A B C D 27 Sodium nitrite Sodium nitrate Ascorbic acid Benzoic acid The figure shows the arrangement of particles of a substance that undergoes the change of state through process X What is process X ? A B C D 4541/1 Melting Boiling Freezing Sublimation 10 [Lihat sebelah SULIT
  • SULIT 28 4541/1 The equation below shows the reaction between sulphuric acid and sodium hydroxide solution. H2SO4 + 2KOH K2SO4 + 2H2O What is the number of moles of sodium sulphate salt produced if 0.2 mol of sodium hydroxide is used? A B C D 29 0.10 mol 0.05 mol 0.22 mol 0.25 mol The table shows the electron arrangements of atoms of four elements. Element Electron arrangement F Al Cl K 2.7 2.8.3 2.8.7 2.8.8.1 Which of the following is the correct arrangement of the elements according to increasing order of electronegativity? A B C D 30 F, Al, Cl, K F, Cl, Al, K K, Cl, Al, F K, Al, Cl, F The number of valence electrons of atoms X and Y are 2 and 7 respectively. Which of the following chemical formulae and types of bonding are true for the compound formed between X and Y? A B C D 4541/1 Chemical Formula XY2 XY2 X2Y X2Y Type of Bonding ionic covalent ionic covalent 11 [Lihat sebelah SULIT
  • SULIT 31 4541/1 The diagram below shows the set-up of the apparatus for electrolysis of concentrated solution of sodium chloride What is the product formed at the anode and cathode? A B C D 32 Anode O2 Cl2 Cl2 O2 Cathode H2 H2 Na Cl2 The diagram below shows 5 steps for preparing a standard solution of sodium hydroxide, NaOH but not in correct order. P- Transfer the solid sodium hydroxide into volume into the volumetric flask. Q- Weigh the mass of sodium hydroxide R- Add distilled water until the graduation mark. S- Rinse the weighing bottle and pour the solution into the volumetric flask. T- Shake the volumetric flask. Which of the following steps is correct? A B C D 4541/1 Q, S, P, R, T R, Q, S, P, T Q, P, S, R, T R, Q, S, T, P 12 [Lihat sebelah SULIT
  • SULIT 33 4541/1 The diagram below shows the test tubes containing lead(II) nitrate solution and potassium carbonate solution but without a label. Which of the following solutions can be used to distinguish both solutions? Potassium carbonate solution I II III IV 34 Sodium nitrate Sodium iodide Dilute nitric acid Potassium sulphate A B C D Lead(II) nitrate solution I and II only II and IV only II, III and IV only I, II, III and IV Which of the following is the alcohol produced from the alkaline hydrolysis of oil? A B C D 4541/1 Ethane-1,2-diol Glycerol Cyclohexanol Buthane-2-ol 13 [Lihat sebelah SULIT
  • SULIT 4541/1 35 Volume of H2 gas / cm3 40 36 30 20 18 10 0 60 120 180 240 300 time / s A group of students carried out an experiment to determine the rate of reaction of zinc metal with dilute hydrochloric acid. The diagram above shows the graph for the total volume of gas collected against time. The average rate of reaction for the whole experiment is : A B C D 36 When a mixture of 2-butanol, CH3CHOHCH2CH3 and concentrated sulphuric acid is heated, gas X is produced. Which of the following is the molecular structure of X? A B C D 37 0.3 cm3/s 0.25 cm3/s 0.17 cm3/s 0.13 cm3/s CH3CH=CHCH3 CH3CH=C(CH3)2 (CH3)2CHCH=CH2 CH3CH2CH=CH2 The diagram below shows the changes of the sulphur in Contact Process. S SO2 SO3 H2S2O7 Which of the following are the correct changes in the oxidation state of sulphur? A B C D 4541/1 0 0 1 1 +4 +4 +3 +4 +6 +6 +6 +6 +6 +7 +8 +6 14 [Lihat sebelah SULIT
  • SULIT 38 4541/1 The following equation shows the formation of water H2(g) + ½ O2(g) → H2O(l) , ∆H = ─ 287 kJmolˉ¹ Which of the following is true regarding the above equation? A B C D 39 Activation energy for the reaction is high If 1 mole of oxygen reacts 574 kJ of heat energy is absorbed Combustion of 1 mole of hydrogen releases 287 kJ of heat energy 1 mole of water that is formed in the reaction received 287 kJ heat energy A patient claims he always heard someone says something to him but he didn’t see anybody around him during the situation. Which of the following medicines is most appropriate in treating the above symptoms or disorders? A B C D Chlorpromazine Amphetamine Tranquilisers Barbiturates 40 Which of the following isotopes is used to detect leakage in a gas pipe. . Carbon – 14 A Cobalt – 60 B Sodium – 24 C Iodine - 131 D 41 34 g of ammonia consists of [Relative molecular mass of ammonia = 17, Avogadro constant = 6.02 x 10 23 mol-1] I 2 mole of nitrogen atoms II 2 mole of ammonia molecules III 1.204 X 1024 molecules IV 5 mole of hidrogen atoms A B C D 4541/1 I and II only I, II and III only II, III and Iv only I, II, III and IV only 15 [Lihat sebelah SULIT
  • SULIT 42 4541/1 Profesional cyclists usually fill their bicycle tyres with gas X which makes the bicycle lighter. X Y W Z Which of the following elements X, Y, W and Z in the Periodic Table is suitable to be used in bicycle tyres? A B C D 43 X Y W Z The diagram below shows the symbols of atoms D and E 27 16 D 13 E 8 Atom D reacts with atom E to form a compound. Calculate the relative molecular mass for the compound formed. A B C D 44 21 43 102 113 Calculate the volume of sodium hydroxide of concentration 0.5 mol dm-3 needed to neutralize 25.0 cm3 sulphuric acid of concentration 0.20 mol dm-3. A B C D 4541/1 10 cm3 20 cm3 25 cm3 50 cm3 16 [Lihat sebelah SULIT
  • SULIT 45 4541/1 The table below shows the potential difference of three simple voltaic cells. Cell Pair of metal I II III Potential difference(V) 3.0 1.5 0.5 Mg and Cu Mg and Zn Zn and Fe Negative terminal Mg Mg Zn What is the potential difference of a simple voltaic cell for pair of iron and copper ? A B C D 46 200 cm3 of 0.1 mol dm-3 sodium chloride solution reacts completely with excess silver nitrate. Calculate the mass of precipitate produced. [Relative atomic mass of: Ag, 108; Cl, 35.5] A B C D 47 0.5 V 1.0 V 1.5 V 2.5 V 2.78 g 2.87 g 3.78 g 3.87 g The uses of substance X;    To clean metals. To produce detergents. To make paints. What is substances X? A B C D 4541/1 Nitric acid Sulphuric acid Ammonia Ammonium sulphate 17 [Lihat sebelah SULIT
  • SULIT 48 4541/1 Graph represents the decomposition of 25 cm3 hydrogen peroxide of 0.5 mol dm-3 with manganese(IV) oxide as a catalyst at a temperature of 30oC. Which of the following experiments will produce graph II ? Volume of hydrogen peroxide / cm3 A B C D 49 15 15 40 40 Concentration of hydrogen peroxide/ mol dm-3 0.7 0.5 0.7 0.5 Temperature of hydrogen peroxide / oC 30 30 30 20 Which of the following equations represents a redox reaction? A B C D 4541/1 Pb(NO3)2(aq) + CuSO4(aq) PbSO4(s) + Cu(NO3)2(aq) CH3COOH(aq) + NaOH(aq) CH3COOH(aq) + H2O(l) Mg(s) + CuSO4(aq) MgSO4(aq) + Cu(s) C2H4(g) + 3O2(g) 2CO2(g) + 2H2O(l) 18 [Lihat sebelah SULIT
  • SULIT 50 4541/1 The diagram below shows the molecular formulae of two compounds A and B. Substance X is formed when both compounds react with each other. Compound B, C2H5COOH Compound A, C2H5OH Substance X Which of the following set represents substance X? Structural formula A H O Name H C C H H H C O H C C H H H Ethyl propanoate H B H O H C C C H C H H H D H H C C H H H H H C C C H H H O O H C C H O C H H C C H H H O H H C C Ethyl propanoate Propyl propanoate H H O H H H Propyl propanoate http://cikguadura.wordpress.com/ END OF QUESTION PAPER 4541/1 19 [Lihat sebelah SULIT
  • SULIT 4541/2 NAMA:.................................................... Tingkatan :.............................. SULIT 4541/2 Kimia Kertas 2 Ogos 2007 2 ½ jam BAHAGIAN SEKOLAH KEMENTERIAN PELAJARAN MALAYSIA PEPERIKSAAN PERCUBAAN SPM 2007 http://cikguadura.wordpress.com/ KIMIA Kertas 2 Dua jam tiga puluh minit JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU 1. 2. 3. 4. 5. 6. Tuliskan nama dan tingkatan pada ruang yang disediakan. Jawab semua soalan daripada Bahagian A. Tuliskan jawapan anda dalam ruang yang disediakan Jawab satu soalan daripada Bahagian B dan satu soalan daripada Bahagian C.Jawapan kepada bahagian B dan Bahagian C hendaklah ditulis pada kertas tulis. Anda diminta menjawab dengan lebih terperinci untuk Bahagian B dan Bahagian C. Jawapan mestilah jelas dan logik. Persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda boleh digunakan. Anda hendaklah menyerahkan kertas tulis dan kertas tambahan, jika digunakan bersama-sama dengan kertas soalan. Penggunaan kalkulator saintifik yang tidak boleh diprogramkan adalah dibenarkan. Bahagian A B C Soalan Markah penuh 1 2 3 4 5 6 7 8 9 10 Markah diperoleh 9 10 10 11 10 10 20 20 20 20 Jumlah Kertas soalan ini mengandungi 16 halaman bercetak 4541/1 [Lihat sebelah SULIT
  • SULIT 4541/2 Section A [60 marks] Answer all questions. 1 Table 1 shows the melting point and boiling point of four substances. Substances P Q R S Melting point/ ºC -5 -105 80 801 Boiling point/ ºC 67 -38 140 1413 TABLE 1 (a) What is the physical state of P and S at room temperature? P: .................................................................................................................... S: .................................................................................................................... [2 marks] (b) Draw the arrangement of particles of P at room temperature. [1 mark] (c) Explain why substance Q has a low melting point and boiling point. ............................................................................................................................ ............................................................................................................................ . ............................................................................................................................ ............................................................................................................................ [2 marks] 4541/2 2 [Lihat sebelah SULIT
  • SULIT 4541/2 (d) Draw the set up of apparatus to determine the melting point of substance R. [2 marks] (e) Sketch the graph of temperature against time for substance R when it is heated from room temperature until it reaches a temperature of 100oC. [2 marks] 4541/2 3 [Lihat sebelah SULIT
  • SULIT 2 4541/2 Diagram 2 shows part of the Periodic Table of Elements. A, B, C, D, E, F, G and H do not represent the actual symbol of the elements. A B C E F D G DIAGRAM 2 Using the letters in the Periodic Table of Elements in Diagram 2, answer the following questions. (a) (i) Write the electron arrangement of atom F. ……………………………………………………………………………. [1 mark] (ii) Give the formula of ion F. ………………………………………………………………………….... [1 mark] (b) Arrange the elements A, B, C, D, E, F and G according to the atomic size in ascending order. ………………………………………………………………………………… [1 mark] (c) Element A exists as a monoatomic gas. Explain why. ………………………………………………………………………………… ………………………………………………………………………………… [1 mark] (d) Element D is more reactive than element G. Explain why. ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… [2 marks] 4541/2 4 [Lihat sebelah SULIT
  • SULIT 4541/2 (e) E reacts with D to form a compound. (i) What is the type of the compound formed? ………………………………………………………………………. …. [1 mark] (ii) Draw the diagram of electron arrangement for the compound formed. [2 marks] (iii) State one physical property of the compound formed. …………………………………………………………………………... [1 mark] 4541/2 5 [Lihat sebelah SULIT
  • SULIT 3 4541/2 Diagram 3 shows two types of cell. V Copper electrode Copper plate Zinc plate Copper(II) nitrate solution Cell J Cell K DIAGRAM 3 (a) Write the formula of all the cations present in the copper (II) nitrate solution. ………………………………………………………………………………… [1 mark] (b) (i) State the observation at the cathode of cell J. …………………………………………………………………………… [1 mark] (ii) Write a half equation for reaction that occurred in the cathode of cell J. …………………………………………………………………………… [ 1 mark] (iii) Name the reducing agent in the cell J. ………………………………………………………………………….. [1 mark] (iv) Name the product formed at the anode if copper electrodes in cell J are replaced by carbon electrodes. …………………………………………………………………………... [1 mark] 4541/2 6 [Lihat sebelah SULIT
  • SULIT 4541/2 (c) Based on cell K, (i) In which direction do electrons flow through the circuit in cell K? Show your answer on Diagram 3. [1 mark] (ii) Name the reaction that occurs at the zinc plate. ……………………………………………………………………............ [1 mark] (iii) State the changes in oxidation number for zinc in this reaction. ………………………………………………………………………........ [1 mark] (iv) What happens to the cell voltage if the copper plate is replaced with the silver plate? …...……………………………………………………………………… [1 mark] (d ) Write overall ionic equation for the reaction. . ……………………………………………………………………………… [1 mark] 4541/2 7 [Lihat sebelah SULIT
  • SULIT 4 4541/2 Table 4 shows the particulars of four different types of manufactured substances in industry. Types Glass Polymer Alloy Composite material Examples Components Borosilicate Z Bronze Silicon dioxide, sodium oxide, calcium oxide and X Vinyl chloride Copper and Y Concrete (cement, sand and small pebbles) and steel W TABLE 4 (a) X is a part of the borosilicate glass. What is X? ........................................................................................................................................ [1 mark] (b) (i) Identify Y. .................................................................................................................................. [1 mark] (ii) Bronze is harder than pure copper. Explain why. ................................................................................................................................ ............................................................................................................................... ................................................................................................................................ [2 marks] 4541/2 8 [Lihat sebelah SULIT
  • SULIT 4541/2 (c) The following diagram shows a part of molecular structure of a compound Z. H Cl H Cl H Cl C C C C C C H H H H H H (i) Draw the structure of its monomer. [1 mark] (ii) Compound Z is often used as a water pipe. State one advantage of this type of pipe as compared to metal pipes. ................................................................................................................................ [1mark] (d) W can withstand high pressure and can support very heavy loads. What is W? ....................................................................................................................................... [1mark] (c) Ammonium fertilizers can be prepared by reactions between ammonia solutian and acids. (i) Write the chemical equation for the preparation of ammonium sulphate fertilizer. ................................................................................................................................ [1 mark] 4541/2 9 [Lihat sebelah SULIT
  • SULIT 4541/2 (ii) Urea, CO(NH2)2 is another example of ammonium fertilizers. Between urea and ammonium sulphate, which one is more suitable for the growth of plants? Prove it. [Relative atomic mass: H,1; C,12; N,14; O,16; S,32] [3 marks] 5 Diagram 5 shows the structural formulae of compounds J and K. DIAGRAM 5 (a) State the homologous series for compounds J and K. Compound J: …………………………………………………………......... Compound K: ……………………………………………………………..... [2 marks] 4541/2 10 [Lihat sebelah SULIT
  • SULIT 4541/2 (b) Compound K can be produced from compound J under a high temperature and pressure in the presence of a catalyst. (i) Name compound K. ………………………………………………………………………....... [1 mark] (ii) Name the reaction. ……………………………………………………………………............ [1 mark] (c) Compound L is produced when an acidic potassium dichromate (VI) solution is added into a test tube containing compound K. (i) State one observation for this reaction. ......………………………………………………………………………. [1 mark] (ii) Write the molecular formula of compound L. ………………………………………………………………………....... [1 mark] (d) Compound J burns completely in excess oxygen. (i) Write the chemical equation for the complete combustion of J. .................................................................................................................... [1 mark] (ii) 5.6 g of compound J undergoes complete combustion at room conditions. Calculate the volume of carbon dioxide gas released. [1 mol of gas occupies 24 dm3 at room conditions; Relative atomic mass: H,1; C,12] 4541/2 11 [3 marks] [Lihat sebelah SULIT
  • SULIT 6 4541/2 A pupil carried out an experiment to determine the value of heat of neutralization. Diagram 6 shows the set up of the apparatus used in the experiment. Thermometer 100 cm3of 2.0 mol dm-3 Sodium hydroxide solution Polystyrene cup 100 cm3of 2.0 moldm-3 hydrochloric acid DIAGRAM 6 The following data was obtained; Initial temperature of hydrochloric acid Initial temperature of sodium hydroxide solution Highest temperature of the mixture of product = 28oC = 28oC = 41oC a) Why was a polystyrene cup used in this experiment? ………………………………………………………………………………….. [1 mark] (b) Given that the specific heat capacity of the solution is 4.2 Jg-1oC-1 and the density of the solution is 1.0 gcm-3. (i) Calculate the change of heat in the experiment. (ii) Calculate the heat of neutralization in the experiment. [3 marks] 4541/2 12 [Lihat sebelah SULIT
  • SULIT 4541/2 (c) Draw the energy level diagram for the reaction. [2 marks] (d) Based on the experiment, what is meant by the heat of neutralisation? ……………………………………………………………………………....... [1 mark] (e) The pupil repeats the experiment by replacing hydrochloric acid with ethanoic acid. All the other conditions remain unchanged. (i) Predict the value of the heat of neutralisation? ……………………………………………………………………......... [1 mark] (ii) Explain why? ………………………………………………………………………........ ...…………………………………………………………………………. ………………………………………………………………………........ .................................................................................................................... [2 marks] 4541/2 13 [Lihat sebelah SULIT
  • SULIT 4541/2 Section B [20 marks] Answer any one question. 7 (a) Type of acid Ethanoic acid Nitric acid Concentration 0.1 mol dm-3 0.1 mol dm-3 pH value 3.0 1.0 Explain why the pH values of these two acids are different. [4 marks] (b) The two solutions are tested with a dry red litmus paper and the results are tabulated below: Solution Ammonia in chloroform Ammonia in water Observation No change in colour Red litmus paper turns blue Explain why only the aqueous ammonia solution turns red litmus paper blue. [5 marks] (c) You are required to prepare dry zinc sulphate salt. The chemicals supplied are  zinc nitrate solution  dilute sulphuric acid  sodium carbonate solution Describe a laboratory experiment to prepare the salt. In your description, include chemical equations involved. [11 marks] 4541/2 14 [Lihat sebelah SULIT
  • SULIT 8 4541/2 (a) What is meant by empirical formula? [1 mark] (b) A carbon compound contains 92.3% of carbon and 7.7% of hydrogen by mass. The relative molecular mass of this compound is 78. Find the molecular formula of this compound. [Relative atomic mass: C, 12; H, 1] [5 marks] (c) Describe how you could determine the empirical formula of magnesium oxide in the laboratory. Your description should include  procedure of experiment  tabulation of result  calculation of the results obtained [Relative atomic mass: O,16; Mg,24] [14 marks] Section C [20 marks] Answer any one question. 9 (a) Define oxidation and reduction in term of changes in oxidation number. [2 marks] (b) Based on electron transfer, explain the oxidation and reduction reaction in (i) changing of Fe2+ ions to Fe3+ ions (ii) changing of Fe3+ ions to Fe2+ ions Use a suitable example for each of the reaction. Include half equations in your anwers. [8 marks] (c) Electrical energy can be produced by redox reaction. Describe an experiment to prove the above statement by the transfer of electrons at a distance. In your description, include  labelled diagram which shows the set up of apparatus  procedure of experiment  observations at both electrodes [10 marks] 4541/2 15 [Lihat sebelah SULIT
  • SULIT 4541/2 10 (a) (i) What is a catalyst? (ii) State two characteristics of a catalyst. (iii) Name one chemical process and the catalyst used in industry. [4 marks] (b) State two factors other than catalyst which can affect the rate of reaction. Based on collision theory, explain how the factors that you mentioned can affect the rate of reaction. [8 marks] (c) Knowledge about the factors that affect the rate of reaction is very useful in human life. State two activities at home and explain how the knowledge about the factors that affect the rate of reaction is applied in the activities mentioned. [8 marks] http://cikguadura.wordpress.com/ END OF QUESTION PAPER 4541/2 16 [Lihat sebelah SULIT
  • SULIT 4541/3 Kimia Kertas 3 Ogos 2007 1½ Jam 4541/3 Nama : ……………………………………………... Kelas : …...…… SEKTOR SEKOLAH BERASRAMA PENUH KEMENTERIAN PELAJARAN MALAYSIA _______________________________________________ PEPERIKSAAN PERCUBAAN SPM 2007 http://cikguadura.wordpress.com/ KIMIA KERTAS 3 Satu jam Tiga Puluh Minit JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU 1. Tuliskan nama dan tingkatan pada ruang yang disediakan. Untuk Kegunaan Pemeriksa Soalan Markah Penuh 1 18 2 15 3 17 JUMLAH 2. Calon dikehendaki membaca maklumat di halaman 2. Markah Diperoleh 50 Kertas soalan ini mengandungi 10 halaman bercetak 4541/3 1 [Lihat sebelah SULIT
  • SULIT 4541/3 INFORMATION FOR CANDIDATES 1. This question paper consists of three questions. Answer all questions. 2. Write your answers for Question 1 and Question 2 in the spaces provided in the question paper. 3. Write your answer for Question 3 on the lined pages at the end of the question paper in detail. 4. Show your working. It may help you to get marks. 5. If you wish to cancel any answer, neatly cross out the answer. 6. The diagrams in the questions are not drawn to scale unless stated. 7. Marks allocated for each question or part question are shown in brackets. 8. The time suggested to answer Question 1 and Question 2 is 45 minutes and Question 3 is 45 minutes. 9. You may use a non-programmable scientific calculator. 10. Hand in this question paper at the end of the examination. Marks awarded: Mark Description 3 Excellent 2 Satisfactory : An average response 1 Weak 0 No response or wrong response 4541/3 : The best response : An inaccurate response 2 [Lihat sebelah SULIT
  • SULIT 4541/3 Answer all questions The time suggested to answer Question 1 and Question 2 is 45 minutes. 1. An experiment was carried out to investigate the effect of the size of the marble chips on the rate of reaction. A burette was filled with water and inverted in a basin containing water. The initial burette reading was recorded. 5.0 g of large marble chips were placed in a conical flask. 50 cm3 of 0.1 mol dm-3 hydrochloric acid, HCl was added into a conical flask. The conical flask was closed with a stopper fitted with a delivery tube directed to the burette and the stop-watch was started simultaneously. The burette reading was recorded at 30-seconds intervals. Experiment was repeated by using 5.0 g of small marble chips. Diagrams below show the burette readings for the experiment between large marble chips with hydrochloric acid. (a) Record the volume of carbon dioxide gas in the spaces provided 50 41 32 49 40 31 48 39 30 Burette reading ……… cm3 at 0 min Burette reading ……… cm3 at ½ min Burette reading ……… cm3 at 1 min 25 20 16 24 19 15 23 18 14 Burette reading ……… cm3 at 1½ min 4541/3 Burette reading ……… cm3 at 2 min 6 3 Burette reading ……… cm3 at 2½ min [Lihat sebelah SULIT
  • SULIT 4541/3 12 10 9 11 9 8 10 8 7 Burette reading ……… cm3 at 3 min 6 Burette reading ……… cm3 at 3½ min 6 Burette reading ……… cm3 at 4 min 9 9 8 8 7 7 Burette reading ……… cm3 at 4½ min Burette reading ……… cm3 at 5 min [3 marks] (b) Construct a table showing the changes of time, burette readings and volumes of carbon dioxide gas liberated for the experiment. [3 marks] 4541/3 4 [Lihat sebelah SULIT
  • SULIT (c) 4541/3 Table 1 shows the volume of carbon dioxide gas liberated when the experiment was repeated by using 5.0 g of small marble chips. Time /min Volume of carbon dioxide / cm3 0 ½ 1 1½ 2 0.00 20.00 29.00 35.00 38.00 2½ 3 3½ 4 40.00 41.50 41.50 41.50 TABLE 1 Based on the data in (b) and Table 1, draw the graphs volume of carbon dioxide gas liberated against time for both experiments on the same axes. [3 marks] (d) State the relationship between the size of marble chips and the rate of reaction? …………………………………………………………………………........ ……………………………………………………………………………… ……………………………………………………………………………… [3 marks] (e) Meat which is cut into small pieces takes a shorter time to cook compared to meat that is cut into big pieces. Explain why? ……………………………………………………………………………… ……………………………………………………………………………… ……………………………………………………………………………… [3 marks] 4541/3 5 [Lihat sebelah SULIT
  • SULIT 4541/3 4541/3 6 [Lihat sebelah SULIT
  • SULIT 4541/3 (e) Complete the table below based on the experiment. Name of variables (i) Manipulated variable ............................................................ Action to be taken (i) The way to manipulate variable ........................................................ ............................................................ ......................................................... ............................................................ ......................................................... (ii) Responding variable ............................................................ (ii) What to observe in the responding variable ............................................................ ......................................................... ............................................................. .......................................................... (iii) Fixed variable ............................................................. (iii) The way to maintain the fixed Variable ............................................................. ......................................................... ............................................................ ......................................................... [3 marks] 2 Diagram 2 shows the set-up of apparatus for an experiment to construct the electrochemical series by measuring the potential difference of a few pairs of copper and metal M in a simple voltaic cell using 1.0 mol dm-3 copper(II) sulphate solution as an electrolyte. Copper Metal M Copper(II) sulphate solution DIAGRAM 2 4541/3 7 [Lihat sebelah SULIT
  • SULIT 4541/3 The result gained is shown in the table 2 I Metal pairs Cu / M Cu / Fe II Cu / Al 2.1 Aluminium, Al III Cu / Mg 2.7 Magnesium, Mg IV Cu / Zn 1.1 Zinc, Zn V Cu / Cu 0.0 Copper, Cu Cell Voltage cell / V Negative terminal 0.8 Iron, Fe TABLE 2 (a) State a hypothesis of the experiment. ……………………………………………………………………………… ……………………………………………………………………………… [3 marks] (b) Based on Table 2, arrange all the metals according to descending order of electropositivity. ……………………………………………………………………………… [3 marks] (c) What is the inference that can be made from voltage cell V. …………………………………………………………………………........ ……………………………………………………………………………… ……………………………………………………………………………… [3 marks] 4541/3 8 [Lihat sebelah SULIT
  • SULIT 4541/3 (d) The diagram below shows simple voltaic cell IV before and after an experiment. Copper Zinc Copper(II) sulphate Solution (blue colour) Before experiment Copper Zinc Copper(II) sulphate Solution (light blue) After experiment What can you observed in cell IV? …………………………………………………………………………........ ……………………………………………………………………………… ……………………………………………………………………………… [3 marks] (e) Predict the voltage cell if zinc and aluminium are used to construct electrochemical series. ……………………………………………………………………………… [3 marks] 4541/3 9 [Lihat sebelah SULIT
  • SULIT 3 4541/3 A more electropositive metal acts as a sacrificial metal which corrodes itself to protect iron from rusting You are given the iron nails, magnesium ribbon, zinc strip, copper strip and tin strip. Referring to the situation above, plan a laboratory experiment to investigate the effect of other metals on the rusting of iron. Your planning should include the following aspects: (a) (b) (c) (d) (e) (f) Statement of the problem All variables Statement of the hypothesis List of materials and apparatus Procedure of the experiment Tabulation of data [17 marks] http://cikguadura.wordpress.com/ END OF QUESTION PAPER 4541/3 10 [Lihat sebelah SULIT
  • SULIT 4541/3 SPACE FOR YOUR ANSWER Section: …………………………………… Question No.: …………………………. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… 4541/3 11 [Lihat sebelah SULIT
  • SULIT 4541/3 ……………………………………………………………………………………………… SPACE FOR YOUR ANSWER Section: …………………………………… Question No.: …………………………. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… …………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… 4541/3 12 [Lihat sebelah SULIT
  • SULIT 4541/1 Kimia Kertas 1 Ogos 2007 4541/1/2/3 BAHAGIAN SEKOLAH KEMENTERIAN PELAJARAN MALAYSIA ______________________________________________ PEPERIKSAAN PERCUBAAN SPM 2007 http://cikguadura.wordpress.com/ KIMIA Peraturan pemarkahan Kertas 1, 2 dan 3
  • Peraturan pemarkahan ini mengandungi halaman bercetak. Kertas 1 1 A 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 B B A B B C D A Bsalah Dbetul C B A A A A D D D B C D D C B C D A D A B C C B D A A C A C 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 http://cikguadura.wordpress.com/ 2 41 A salah Bbetul 42 A 43 C 44 B 45 B 46 B 47 B 48 A 49 C 50 B
  • Kertas 2-Bahagian A http://cikguadura.wordpress.com/ No. 1 Rubric (a) P: liquid S: solid Mark 1 1 (b) 1 (c) 1. Particles of Q held together by weak intermolecular forces 2. A small/less amount of heat energy is required to overcome 1 1 (d) Diagram 1. label 2. functional apparatus 1 1 (e) Temperature / oC Time ( min) 1. label of axis 2. shape of graph 2 1 1…9 2.8.3 // 2,8,3 reject 2: 8: 3 F+3 // F3+ 1 1 (b) A,D,C,B,G,F,E 1 (c) Atom A has a stable/duplet electron arrangement/2 valance electron octet - reject 1. Size of atom D is smaller than G // G is bigger 2. Strength of the nucleus of atom D to attract electron increase 1 Ionic/ ionic compound reject – ionic bond 1 (a)(i) (ii) (d) (e)(i) 3 1 1
  • (e)(ii) D x x x 2+ xx x x x E x D x xx 1. Number of shells and electrons 2. Charge (e) (iii) has high melting point and boiling point conduct electricity in molten state or aqueous solution reject – can conduct electricity - soluble in water - insoluble in organic solvent (Any one) 1 1 - 1...10 H+ , Cu+2 1 (b) (i) (ii) (iii) (iv) Copper/cathode electrode becomes thicker//brown solid is deposited Cu+2 + 2e  Cu Copper // metal/ electrode [reject copper ion// copper solution] Oxygen gas [ reject water] 1 1 1 1 (c) (i) (ii) (iii) (iv) 3 (from zinc plate to copper plate) Oxidation 0 to +2 //0  +2 Increases / deflect more / higher 1 1 1 1 Zn + Cu+2  Cu + Zn+2 1...10 (a) (d) 4 (a) Boron oxide (b) (i) Tin (ii) 1. The presence of tin atoms of different size from the atoms of copper distrupts the orderly arrangements of copper atoms 2. This prevents the layers of atoms from sliding over one another easily (c) (i) H Cl | | C == C | | H H 1 1 1 1 1 4
  • (ii) Does not corrode / rust (d) (e) (i) 1 Reinforced concrete 1 2NH3 + H2SO4  (NH4)2SO4// 2NH4OH + H2SO4  (NH4)2SO4 + 2H2O 1 (ii) 2(14)  100%  46.67% 60 1 % N in CO(NH2)2 = % N in (NH4)2SO4 = 2(14)  100  21.21% 132 1 Urea has higher percentage of nitrogen so it is more suitable for the growth of plants 1…11 (a) J: alkene K: alcohol 1 1 (b)(i) 5 Butan-2-ol 1 (ii) Hydration/addition of steam [reject – dehydration / hydrogenation] (c)(i) 1 1 Orange to green (ii) C3H7COOH 1 C4H8 + 6O2  4CO2 + 4H2O 5.6 = (ii) No of mole C4H8 4(12)  8(1) 5 .6 = 56 = 0.1 1 mole of C4H8  4 mole CO2 0.1 mole of C4H8  0.4 mole CO2 1 (d)(i) Volume of CO2 6 (a) (b)(i) = 0.4(24) = 9.6 dm3 / 9600 cm3 1 1 1…10 Reduce heat released to the surrounding/ to prevent heat lose 1 Heat change = 200 x 4.2 x 13 = 10920 J 1 5
  • (b)(ii) Mole of H+/OH-/water = 100 x 2.0 // 0.2 mol 1000 Heat of displacement = - 10920 J // -54.6 kJmol-1 0.2 mol Energy (c) 1 1 H+ + OH- H2O 1. Label the energy axis & correct energy level of the reactants and product 2. Correct chemical equation// ionic equation (d) (e)(i) 1 Heat released/ produced when 1 mol of water is formed 1 decreases / less / lower 1 (ii) 1. Ethanoic acid is a weak acid 2. Some of the heat given out during the neutralization is used to ionize/dissociate the ethanoic acid // absorb back 6 1 1 1…10
  • Essay http://cikguadura.wordpress.com/ No. 7 Rubric (a) Mark 1. pH value of ethanoic acid is higher than nitric acid 2. ethanoic acid is a weak acid; nitric acid is a strong acid 3. ethanoic acid ionises partially in water to produce lower concentration of hydrogen ion 4. nitric acid ionises completely in water to produce higher concentration of hydrogen ion 1 1 1 (b) 1. 2. 3. 4. 5. 1 1 1 1 1…5 (c) 1. Pour [20-100]cm3 of zinc nitrate solution [0.1-1.0]mol dm-3 into a beaker 2. Add [20-100]cm3 of sodium carbonate solution [0.1-1.0]mol dm-3 3. Stir and filter the mixture 4. Pour [20-100]cm3 dilute/[0.1-1.0]mol dm-3 sulphuric acid into a beaker 5. Add the residue/precipitate into the acid until in excess 6. Stir and filter the mixture 7. Heat the filterate until saturated/1/3 of original volume 8. Cool the saturated solution 9. Filter and dry the crystal 10. Zn(NO3)2 + Na2CO3  ZnCO3 + 2NaNO3 11. ZnCO3 + H2SO4  ZnSO4 + H2O + CO2 ammonia exist as molecule in chloroform there are no hydroxide ions present; the solution is not alkaline when ammonia ionises partially in water to produce hydroxide ion NH3 + H2O  NH4+ + OHthe presence of OH- ions makes the solution alkali 1…4 1 1 1 1 1 1 1 1 1 1 1...11 20 7
  • No. 8 Rubric (a) (b) Mark Formula that shows the simplest ratio of the number of atoms for each element in the compound. Element Mass (%) Number of moles Ratio of moles C 92.3 92.3 = 7.7 12 1 H 7.7 7 .7 = 7.7 1 1 Empirical formula : CH RMM of (CH)n = 78 [ 12 + 1]n = 78 13 n = 78 n = 6 Molecular formula : C6H6 (c) 1…1 1 1 1 1 1…5 Procedure: 1. Clean magnesium ribbon with sand paper 2. Weigh crucible and its lid 3. Put magnesium ribbon into the crucible and weigh the crucible with its lid 4. Heat strongly the crucible without its lid 5. Cover the crucible when the magnesium starts to burn and lift/raise the lid a little at intervals 6. Remove the lid when the magnesium burnt completely 7. Heat strongly the crucible for a few minutes 8. Cool and weigh the crucible with its lid and the content 9. Repeat the processes of heating, cooling and weighing until a constant mass is obtained 10. Record all the mass 1 1 1 1 1 1 1 1 1 1 Results: Crucible + lid Crucible + lid + magnesium Crucible + lid + magnesium oxide 8 Mass/g x y z 1
  • Element Mass (g) Number of moles Simplest ratio of moles Mg y-x yx 24 a O z-y zy 16 b Calculatio ns: 1 1 1...14 Empirical formula: MgaOb / MgO 20 No. 9 Rubric (a) 1. Oxidation - increase in oxidation number 2. Reduction – decrease in oxidation number (b)(i) 1. Fe+2  Fe+3 + e 2. Br2 + 2e  2Br – 3. Iron(II) ions lose electrons to become iron(III) ions. Iron(II) ions are oxidised 4. Bromine molecules gain electrons to form bromide ions. Bromine molecules are reduced (a: any suitable reducing agent) 1. Fe+3 + e  Fe+2 2. Zn  Zn+2 + 2e 3. Iron(III) ions gain electrons to become iron(II) ions. Iron(III) ions are reduced 4. Zinc atoms lose electrons to form zinc ions. Zinc atoms are oxidised (a: any suitable reducing agent) 9 Mark 1 1…2 1 1 1 1 1 1 1 1…8
  • (c) Diagram: 1. label 2. functional apparatus 1 1 Procedure: 1. Pour dilute sulphuric acid into a U-tube 2. Using a dropper, add iron(II) sulphate solution at one side 3. and acidified potassium manganate(VII) solution at another side 4. Place carbon electrode in each side of the U-tube 5. Connect the electrodes to a galvanometer by using connecting wires//Complete the external circuit 6. Record any change that can be observed after a few minutes 1 1 1 1 1 1 Observations: The green colour of iron(II) solution turns to brown 1 The purple colour of acidified potassium manganate(VII) solution is 1…10 decolourised/change to colourless (a: any suitable cell) 20 No. Rubric 10 (a) (i) Catalyst is a substance that changes the rate of a chemical reaction. (a) (ii) - does not change the amount of product formed. - unchanged chemically at the end of reaction. - the amount of catalyst is the same before and after the reaction. - it is specific for a reaction. - only small amount is needed to catalyze a reaction. - less effective when there are impurerities. - most of the catalyst are transition metals or their compound. (Any two) (a) (iii) - Haber process: iron filling - Contact process: vanadium(V) oxide - Ostwald process: platinum 10 Mark 1 1 1…2 1…1
  • (Any one) (b) Size of reactant - size of reactant decrease, total surface area exsposed for collision between the particles reactants increase - frequency of collision between particles increase - frequency of affective collision increase rate of reaction increase 1 1 2 Concentration of reactant - concentration of a solution increase, number of particles per unit volume increase - frequency of collision between particles increase - frequency of affective collision increase rate of reaction increase 1 1 3 Temperature of reaction - temperature of reactants increase, kinetic energy of particles reactants increase - frequency of collision between particles increase - frequency of affective collision increase rate of reaction increase (Any two) (c) 1 1 1 1 Cooking of solid food - solid food cut into small piece - total surface area exsposed to heat increase - food cook faster 1 1 1 1…4 2 Cooking of food in a pressure cooker - high pressure raises the boiling point of water. - cooking is carried out at a temperature higher than 100 o C. - food cook faster. 1 1 1 1…4 3 Storing of food in a refrigerator - temperature in refrigerator is lower - microorganisms inactive - slow down rate of food decaying (Any two) (a: any suitable answer than above) 1 1 1 1…4 1 1…4 1 1…4 1 1…4 20 11
  • PAPER 3 http://cikguadura.wordpress.com/ (a) 1 Score 3 2 1 0 Rubric [ Able to state all 11 readings correctly ]  2 decimal places  Unit cm3 Suggested answer 49.60, 40.10, 31.50, 24.10, 19.50, 15.10, 11.50, 9.60, 8.10, 8.10. 8.10 [ Able to state any 8 readings correctly ] [ Able to state any 4 readings correctly ] No response or wrong response 1 (b) Score Rubric 3 [Able to design a table and record the time, buret reading and volume of gas liberated] 1. Time /minute 2. Buret reading /cm3 3. Volume of gas liberated Suggested answer: Time /min 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Buret 49.60 40.10 31.50 24.10 19.50 15.10 11.50 9.60 8.10 8.10 8.10 reading /cm3 Volume 0.00 9.50 18.10 25.50 30.10 34.50 38.10 40.00 41.50 41.50 41.50 of gas / cm3 2 1 [Able to design a table and record two of the 3 items (time, buret reading and volume of gas liberated] // [Able to design table without unit] [Able to give idea on table ] Suggest answer: 2 rows x 11 columns 12
  • 1 (c) Score 3 Rubric [ Able to draw 2 graphs of volume of carbon dioxide gas liberated against time for both experiments on the same axes with all the 4 items below correctly ] (i) suitable scale used (ii) axes labelled correctly (iii) all points plotted correctly (iv) smooth curve of graphs 2 [Able to draw the graphs of volume of carbon dioxide gas liberated against time for both experiments on the same axes with at least 3 items correctly] // [Able to draw one of the graphs volume of carbon dioxide gas liberated against time with at least 4 items abovebelow correctly] 1 0 [ Able to manipulate two items correctly ] No response or wrong response 1(d) Score 3 Rubric [Able to deduce the relationship between the size of marble chips and the rate of reaction correctly]. Suggested answer: Small pieces of marble chips have a large total surface area than that a large pieces of marble chips of the same mass, course the time taken for reaction more faster / rate of reaction more higher 2 [Able to give incomplete relationship] Suggested answer: Small pieces of marble chips have a large total surface area time taken for reaction more faster / rate of reaction more higher 1 [Able to give an idea ] Suggested answer: Small pieces of marble chips have a large total surface area // time taken for reaction more faster when size of reactant smaller // rate of reaction depend on the size of reactant No response or wrong response 0 13
  • 1 (e) Score 3 Rubric [ Able to state three variables and the way to control them correctly ] Example : Manipulated variable : Total suface area of marble Replace large marble chips with small small marble chips Responding variable : Rate of reaction // time Measure the volume of gas collected at half-minute interval Fixed variable : Mass of marble, volume of Use the same mass/5.0 g marble, hydrochloric acid, temperature same volume/50 cm3 and concentration/ 0.1 mol dm-3 hydrochloric acid, same tepperature in each of the experiment 2 [ Able to state any pair of variable and action correctly ] 1 [ Able to state any variable and any action correctly // any two variables correctly // any two action correctly] 0 No response or wrong response 1 (f) Score 3 2 Rubric [Able to state relationship small pieces of meat and time to cook correctly] Suggested answer  Smaller pieces of meat has bigger total surface area  The larger surface area provides a larger area for absorbtion heat  Increased obsorption of heat shorten cooking time// The rate of reaction increases [Able to give incomplete relationship ] Suggested answer [state the any two items above] 1 [Able to give an idea // state any one items above] 0 No response or wrong response 14
  • 2 (a) Score 3 Rubric [Able to give the hypothesis accurately] Suggested answer : The further the metal is from copper in the electrochemical series, the greater is their potential different/ voltage reading. // The further apart the metal is in the electrochemical series, the greater the potential different/ voltage reading. 2 [Able to give the hypothesis almost accurately] Suggested answer : The further the metal is from copper in the reactivities series, the greater is their potential different/ voltage reading. // The further apart the metal is in the reactivities series, the greater the potential different/ voltage reading. 1 [Able to state an idea of hypothesis] Suggested answer : The position of metal influence the different potential/ voltage reading. Type of metal influence the different potential/ voltage reading. 0 2 (b) Score 3 No response or wrong response Rubric [Able to arrange all the 5 metals according to descending order of electropositivity correctly] Suggested answer: Magnesium, Aluminium, Zinc, Iron, Copper [a: formula] 2 [Able to arrange all the 4 metals but according to increasing order of electropositivity correctly] Example: Mg, Al, Fe, Cu, Zn // Al, Zn, Fe, Cu, Mg // Al, Zn, Mg, Fe, Cu 1 [Able to arrange all the 5 metals but according to ascending order of electropositivity correctly] Example ; Cu, Fe, Zn, Al, Mg 15
  • 0 2 (c) Score 3 No response or wrong response Rubric [Able to state inference correctly]. Suggested answer  Electrical energy is not produced  No movement of electron because the same type of metal are used as electrodes in a voltaic cell 2 [Able to state inference not completely]. Suggested answer Electrical energy is not produced // no movement of electron because the same type of metal are used as electrodes in a voltaic cell 1 [Able to state an idea] Example No electric/electron/potential difference 0 No response or wrong response 2 (d) Score 3 Rubric [Able to state three observations correctly] Suggested answer: 1 Zinc dissolved // becomes thinner 2 Copper becomes thicker // brown solid deposited 3 Blue solution becomes light blue /fading in colour 2 [Able to state two observation correctly] 1 [Able to state one observation/idea about observation of the cell] 0 No response given or wrong response 16
  • 2 (e) Score 3 Rubric [Able to predict correctly] Answer: 1.0 V 2 [Able to predict almost correctly] 1 Example: 1.0 [Able to state an idea to arrange the metals] Example: Reading is higher than 0.5 / lower than 1.5 0 No response or wrong response Essay 3 (a) - Statement of the problem Score 3 Rubric [ Able to give the statement of problem correctly ] Example : How the effect on rusting when iron is in contact with another metals? [ Able to give the statement of problem incorrectly ] 2 Example : To investigate the effect of other metals on the rusting of iron [ Able to state an idea the statement of problem] 1 Example : To study the rusting of iron 0 [ No response or wrong response] 17
  • 3 (b) - variables Score 3 Rubric [ Able to state All variables correctly ] Suggested answer : Manipulated variable : Different types of metals// Different metals Responding variable : Rate of rusting // Rusting of iron Constant variable : Iron nails/temperature 2 [ Able to state any two variables correctly ] 1 [ Able to state any one variables correctly ] 0 [ No response or wrong response] 3 (c) - hypothesis Score 3 Rubric [Able to give the hypothesis accurately] Suggested answer : When a more electropositive metal is in contact with iron, the metal inhabits rusting // When a less electropositive metal is in contact with iron, the metal speed up rusting // Iron rusts faster when in contact with metal less electropositive 2 [Able to give the hypothesis almost accurately] Suggested answer : When a more reactive metal is in contact with iron, the metal inhabits rusting 1 [Able to state an idea of hypothesis] Suggested answer : When a less electropositive metal is in contact with iron, the metal inhabits rusting 0 No response or wrong response 18
  • 3 (d) - Apparatus and materials Score 3 Rubric [ Able to give the list of the apparatus and substances correctly and completely] Suggested answer : Apparatus : Five test tubes, test tube rack Materials : sand paper, five iron nails, magnesium strip, zinc strip, tin strip, copper strip, hot agar-agar/jelly solution mixed with potassium hexacyanoferrate(III) solution and phenolphthalein indicator [ Able to give the list of the apparatus and substances correctly and but not completely] 2 Example : List of apparatus and materials Test tube, iron nail, magnesium,zinc, tin,copper,water, potassium hexacyanoferrate(III) / phenolphthalein indicator [ Able to give an idea about the list of the apparatus and materials correctly] 1 Example : Any one apparatus and two materials 0 [No response or wrong response] 3 (e) - Procedure of the experiment Score 3 2 Rubric [ Able to state all procedures correctly ] Suggested answer : 1. Clean all the metal strips with sand paper 2. Coil the metal strip around the iron nails and then put in the each test tube 3. Pour the same volume of hot agar-agar/jelly solution has been mixed with potassium hexacyanoferrate(III) and phenolphthalein indicator 4. Leave the test tubes aside for one day 5. Compare the intensity of the blue and pink colour in each test tube and recorded [ Able to state 3 steps of procedures correctly ] Example : Steps 2,3,5 19
  • 1 [ Able to state 2 steps of procedures correctly ] Steps 2,3 0 [No response or wrong response] 3 (f) - Tabulation of data Score Rubric [ Able to exhibit the tabulation of data correctly ] Tabulation of data has 6 columns and 3 rows 3 Example : Test tube Intensity of blue colour Intensity of pink colour A B C D E [ Able to exhibit the tabulation of data less accurately ] 2 Tabulation of data has 6 columns and 2 rows Example : Test tube Observation A B C D E [ Able to state an idea about the tabulation of data ] Tabulation of data has 2 columns and 2 rows 1 0 [No response or wrong response] Total 3 × 6 = 18 Max 17 Nota utk pemeriksa* Markah Kertas 1 + Markah Kertas 2 + Markah Kertas 3 2 50 + 100 + 50 2 = Markah keseluruhan = 100% http://cikguadura.wordpress.com/ 20