66136916 kimia-paper-2-f4-akhir-sbp-06

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  • 1. SULIT 4541/2 [Lihat sebelah 4541/2 SULIT Untuk Kegunaan Pemeriksa Bahagian Soalan Markah Penuh Markah Diperoleh 1 11 2 9 3 10 4 10 5 10 A 6 10 7 20 B 8 20 9 20 C 10 20 Jumlah Nama : ... Kelas : ... SEKTOR SEKOLAH BERASRAMA PENUH KEMENTERIAN PELAJARAN MALAYSIA _______________________________________________ PEPERIKSAAN AKHIR TAHUN TINGKATAN 4 2006 KIMIA KERTAS 2 Dua jam Tiga Puluh Minit JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU 1. Tuliskan nama dan tingkatan pada ruang yang disediakan. 2. Calon dikehendaki membaca maklumat di halaman 2. Kertas soalan ini mengandungi 24 halaman bercetak 4541/2 Kimia Kertas 2 Nov 2006 2 Jam
  • 2. SULIT 4541/2 4541/2 SULIT 2 INFORMATION FOR CANDIDATES 1. This question paper consists of three sections: Section A, Section B and Section C. 2. Answer all questions in Section A. Write your answers for Section A in the spaces provided in the question paper. 3. Answer one question from Section B and one question from Section C. Write your answers for Section B and Sectioin C on the lined pages at the end of the question paper. Answer questions in Section B and Section C in detail. You may use questions, diagrams, tables, graphs and other suitable methods to explain your answer. 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 question 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 Section A is 90 minutes, Section B is 30 minutes and Section C is 30 minutes. 9. You may use a non-programmable scientific calculator. 10. Hand in this question paper at the end of the examination.
  • 3. SULIT 4541/2 [Lihat sebelah 4541/2 SULIT 3 Section A [60 marks] Answer all questions in this section. The time suggested to complete Section A is 90 minutes. 1 Figure 1 shows part of the Periodic Table of the Elements. A, B, C, D, E, F, G and H do not represent the actual symbol of the elements. A F B D E G C H FIGURE 1 Using the letters in the Periodic Table of the Elements in Figure 1, answer the following questions. (a) Choose two elements which are metals and are placed in the same group. . [1 mark] (b) Write the electron arrangement for an atom of element F. . [1 mark] (c) Write the formula for the ion formed from an atom of element D. . [1 mark] (d) (i) State an element which has a special characteristic that is can form coloured compound. [1 mark] (ii) State another special characteristic for the element that is stated in (d)(i). [1 mark] (e) State one element that forms acidic oxide. . [1 mark]
  • 4. SULIT 4541/2 4541/2 SULIT 4 (f) Arrange A, B, D, E, F and G according to the increase in size of the atoms. . [1 mark] (g) Element A can react with water. (i) Write the chemical equation for the reaction between A and water. [1 mark] (ii) When a red litmus paper is put into the solution in (g)(i), the red litmus paper turns blue. Based on the observation, state the property of the solution formed. [1 mark] (h) Element H is less reactive than element E. Explain why. ... ... ... ... ... [2 marks]
  • 5. SULIT 4541/2 [Lihat sebelah 4541/2 SULIT 5 2 Figure 2 shows the structural formula of compound X. FIGURE 2 (a) What is the meaning of molecular formula? ... . [1 mark] (b) Write the molecular formula of compound X. . [1 mark] (c) Can compound X conduct electricity? State a reason for your answer. . . [2 marks] C C C C C O H OH CH2OH H H H OH OH H OH
  • 6. SULIT 4541/2 4541/2 SULIT 6 (d) Compound Y contains 52.2% of carbon, 13.0% of hydrogen and 34.8% of oxygen by mass. Given that the relative atomic mass of H=1, C=12, O=16. (i) Find the empirical formula of compound Y. [3 marks] (ii) If the molar mass of compound Y is 46 gmol-1 , find its molecular formula. [2 marks]
  • 7. SULIT 4541/2 [Lihat sebelah 4541/2 SULIT 7 3 (a) Figure 3 shows the flow chart for the industrial manufacture of sulphuric acid. FIGURE 3 Based on Figure 3, answer the following questions. (i) Name the process of manufacturing sulphuric acid. . [1 mark] (ii) Describe how sulphur dioxide gas can be produced at stage I . . [1 mark] (iii) Name catalyst X in stage II. . [1 mark] (iv) Write the chemical equation for the reaction that takes place at stage II. . [1 mark] (v) At stage III, sulphur trioxide is dissolved in concentrated sulphuric acid to produce oleum. Write the chemical formula of oleum. [1 mark]
  • 8. SULIT 4541/2 4541/2 SULIT 8 (b) Brass is an example of alloy. (i) Name the main element which is added to copper to form brass. . [1 mark] (ii) Draw the arrangement of atoms in pure copper and brass. Pure copper Brass [2 marks] (iii) Brass is harder than copper. Explain why. ... ... ... ... ... [2 marks ]
  • 9. SULIT 4541/2 [Lihat sebelah 4541/2 SULIT 9 4 An activity is carried out in the laboratory to determine the end point of the reaction between 25.0 cm3 of potassium hydroxide solution and 1.0 moldm-3 of sulphuric acid. Phenolphthalein is used in the titration to detect the end point of the reaction. Figure 4 shows the set-up of apparatus for the titration. FIGURE 4 The volume of sulphuric acid added and the changes of the colour of potassium hydroxide solution are shown in the Table 4 below. TABLE 4 (a) Name the chemical reaction between potassium hydroxide solution and sulphuric acid. [1 mark] (b) Write a chemical equation for the reaction. ... [1 mark] Volume of sulphuric acid (cm3 ) 4.50 4.60 4.70 4.80 4.90 5.00 5.10 5.20 5.30 5.40 Colour of potassium hydroxide solution Pink Pink Pink Pink Pink Colour- less Colour- less Colour- less Colour- less Colour- less Sulphuric acid 1.0 moldm-3 25.0 cm3 of potassium hydroxide solution and a few drops of phenolphthalein White tile
  • 10. SULIT 4541/2 4541/2 SULIT 10 (c) Write the formula of ions which are present in the conical flask when the volume of sulphuric acid added is: (i) 4.50 cm3 (ii) 5.30 cm3 [2 marks] (d) How much sulphuric acid is required to neutralise 25.0 cm3 of potassium hydroxide solution? .......... [1 mark] (e) Calculate the molarity of potassium hydroxide used in the above activity. [3 marks] (f) If sulphuric acid is replaced with nitric acid with the same molarity, predict the volume of nitric acid require to neutralise 25.0 cm3 of the potassium hydroxide solution. Explain why. .......... .......... .......... [2 mark]
  • 11. SULIT 4541/2 [Lihat sebelah 4541/2 SULIT 11 5 Figure 5 shows the set-up of apparatus to investigate the electrolysis of 0.0001 moldm-3 sodium chloride solution. FIGURE 5 (a) Name all the anions present in the solution. [1 mark] (b) What is the energy change that occurs in the electrolysis process? [1 mark] (c) (i) Name the gas collected in the test tube at electrode X. [1 mark ] (ii) Write the half equation for the reaction at electrode X. [1 mark] (iii) Explain how to confirm the gas produced at electrode X. [2 marks] Dilute sodium chloride solution 0.0001 moldm-3 sodium chloride solution Carbon electrode Y Carbon electrode X
  • 12. SULIT 4541/2 4541/2 SULIT 12 (d) What ion is discharged at electrode Y? Explain your answer. .... .... [2 marks ] (e) The volume of gas collected at electrode Y is 30 cm3 . Given that Avogadro number is 6.02 1023 mol-1 and 1 mol of gas occupies a volume of 24 dm3 mol-1 at room condition. (i) Calculate the number of mole of the gas produced. [1 mark] (ii) What is the number of gas molecules collected? [1 mark]
  • 13. SULIT 4541/2 [Lihat sebelah 4541/2 SULIT 13 6 Figure 6 shows four test tubes contain dry glacial ethanoic acid, aqueous solution of ethanoic acid, dilute hydrochloric acid and aqueous solution of X. P Q R S FIGURE 6 (a) (i) State the colour change of the litmus paper in test tubes Q and R. ................................................................................................................................ [1 mark] (ii) Write the formula of ion which caused the colour change of the litmus paper. ................................................................................................................................ [1 mark] (b) Is there any changes of colour of the litmus paper in test tu