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SULIT Kimia Kertas 1 Mac 2012 1 jam KOLEJ TUN DATU TUANKU HAJI BUJANG ______________________________________________ UJIAN DIAGNOSTIK SIJIL PELAJARAN MALAYSIA 2012

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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 23 halaman bercetak SULIT 1 4541/1

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INFORMATION FOR CANDIDATES 1 2 3 4 5 6 7 This question paper consists of 50 questions. Answer all questions. Answer each question by blackening the correct space on the answer sheet. Blacken only one space for each question. If you wish to change your answer, erase the blackened mark that you have made. Then blacken the space for the new answer. The diagrams in the questions provided are not drawn to scale unless stated. You may use a non-programmable scientific calculator.

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SULIT 1. Which of the following statements is true about the scientific method? A. Hypothesis is the possible explaination about the observation B. Inference is a conclusion which may be true or false C. Two variables are manipulated in an investigation D. Constant variables affect the responding variables 2. When a molten naphthalene is cooled to the temperature lower than its melting point A. the force between molecules become stronger B. the distance between the molecule decreases C. the molecules have more energy and move randomly D. the molecules in molten state is heavier than in solid state 3. Diagram 1 shows an atomic structure.

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Diagram 1 The particles labeled with X was discovered by A. Ernest Rutherford B. John Dalton C. J.J Thomson D. James Chadwick 4. The equation below represents the reaction between iron ore, magnetite with hydrogen gas.

Fe3O4 (s) + xH2 (g)Find the sum of x, y and z that balances the equation. A. 5 B. 7 C. 8 D.11

yFe (s) + zH2O (l)

5. Why argon does not react with oxygen at room temperature? A. It is an inert gas B. It has 10 electrons in the molecule C. It has two occupied electron shells D. It has 8 valence electrons in the outermost shell 6. The chemical formula of a copper(II) sulphate crystals is CuSO4. 5H2O. What is the relative molecular mass? [ Relative atomic mass : Cu,64 ; S,32 ; O,16; H,1 ] A. 160 B. 178 C. 186

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7. 2.03 g of element X reacts with 0.8 g of element Y. What is the empirical formula of the compound formed between X and Y? [ Relative atomic mass : X, 27 ; Y, 16] A. X2Y3 B. XY2 C. X3Y4 D. X4Y3 8. When going across a period in the Periodic Table of Elements, the elements show increasing in I proton number II nucleon number III metallic properties IV number of valence electrons A. I and II only B. II and III only C. I, II and III only D. I, II and IV only 9. Which of the following shows correct match of colour for Cr3+, Cu2+ and Mn2+ ions respectively?A B C D Cr3+ Yellow Orange Green Blue Cu2+ Blue Green Blue Red Mn2+ Pink Blue Pink Purple

10. Diagram 2 shows the set-up of apparatus to study the conductivity of electricity by different solutions.

Diagram 2 A. Ammonia in benzene B. Hydrogen chloride in water C. Lead (II) chloride in ethanol D. Ethanol in benzene

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11. A 0.5 mol dm-3 of silver nitrate aqueous solution is electrolysed using silver electrodes. Which of the following half-equations represents the reaction that occurred at the anode? A. 4OHO2 + 2H2O + 2e+ B. 2H + 2e H2 C. Ag+ + eAg D. Ag Ag+ + e12. Diagram 3 shows the stages involved in manufacturing sulphuric acid.

Diagram 3 Vanadium(V) oxide is used to speed up the rate of reaction at stage A. I B. II C. III D. IV 13. Which of the following substances is a synthetic polymer? A. Starch B. Protein C. Glycogen D. Perspex 14. Diagram 4 shows the set-up of apparatus to prepare copper(II) sulphate crystals.

Diagram 4 Which of the following is the correct sequences to obtain the crystals of copper(II) sulphate after this step? A. Heating Evaporation Filtration Cooling Drying B. Filtration Evaporation Cooling Filtration Drying C. Heating Filtration Evaporation Drying Cooling D. Cooling Evaporation Heating Filtration Drying

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15. Diagram 5 shows the symbol of element Q. x

Qy Diagram 5 Atom Q has 4 protons and 5 neutrons. What is x and y ?A B C D x 4 5 9 13 y 5 4 4 4

16. Below is the molecular formula of a fertilizer. CO(NH2)2 What is the percentage of nitrogen in this fertilizer? A. 11.7 % B. 23.4 % C. 35.0 % D. 46.7 % 17. During electrolysis of aqueous X chloride solution with carbon electrodes, hydrogen gas is produced at the cathode. What conclusion can be made about X ? [ The letter X is not actual symbol of the element ] A. X ion is placed higher than H+ ion in Electrochemical Series B. H+ ions is more reactive than ions of X C. X is very soluble in water D. X has higher boiling points 18. A few drops of phenolphthalein are added into sulphuric acid and pure water respectively. Which of the following observation is true ?A B C D Sulphuric acid Red Colourless Blue Pale pink Pure water Purple Pale pink Green Purple

19. Which of the following is not a carbon compound? A. Natural rubber B. Kerosene C. Wool D. Silicate

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SULIT 20. Which of the following are considered as a class of ceramics ? I Porcelain II Calcite III Duralumin IV Pyrex A. I and II B. I and III C. II and IV D. III and IV

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21. Atom of an ion P+ is placed in Group 1 and Period 3 with proton number 11. Which of the following shows the correct electron arrangement of an ion P? A.

B.

C.

D.

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22. Salt Y is a green coloured salt. When heated, it decomposes to release a colourless gas that turns acidified potassium manganate(VII) solution from purple to colourless. A brown residue is left. What is salt Y ? A. Copper (II) carbonate B. Lead (II) nitrate C. Iron (II) sulphate D. Iron (II) nitrate 23. Diagram 6 shows an electrolytic cell. The bulb lights up when the switch is turned on.

Diagram 6 Which of the following is incorrect? A. X has high melting point B. X could be molten lead (II) bromide C. X is soluble in water but insoluble in organic solvents D. X could be naphthalene 24. Diagram 7 shows a list of elements. 23 Na 11 19 39 K 54 Diagram 7 131 Xe 84 Kr 36

Which of the following statements are true about the elements? I Sodium and potassium exhibits the same chemical properties II Xenon and krypton have the octet arrangement III Krypton is a very reactive gas IV Potassium has 9 valence electrons A. I and II B. I and III C. II and IV D. III and IV

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25. An element Q combines chemically with chlorine to produce a compound QCl2 with ionic bond. Which of the following is true about Q? A. Has electron arrangement of 2.8.8.1 B. Receives electrons to form anion C. Has 2 valence electrons D. Cannot conduct electricity in solid and molten form 26. Which of the following ions are present in aqueous potassium chloride? A. K+ and Cl- ions B. H+ and OH- ions C. K+, Cl- and OH- ions D. K+, H+, OH- and Cl- ions 27. A compound has a molecular weight of 44. This compound may be I C3H8 II NaOH III CO2 IV KOH A. I and II B. I and III C. II and IV D. III and IV 28. Table 1 shows the reading on voltmeter of a Galvanic cell when tested with different metallic pairs.Metallic pairs Mg / Cu Sn / Cu Al / Cu Negative terminal Magnesium Tin Aluminium Positive terminal Copper Copper Copper Voltage 2.7 0.8 X

Table 1 What is the value for X ? A. 0.3 B. 0.4 C. 2.8 D. 1.9 29. Table 2 shows the result of an experiment.Metallic pairs Mg / Cu Ag / Cu Negative terminal Magnesium Positive terminal Copper Voltage 2.7 1.1

Table 2 For metallic pair Ag /Cu, which will be the negative terminal and positive terminal?Negative terminal Copper Positive terminal Silver

A

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SULITB C D Silver Hydrogen Hydrogen Copper Copper Silver

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30. The following equation shows the reaction between P with chlorine.

Molecular formula of P is A. C3H6 B. C4H8 C. C4H10 D. C5H10 31. In two separate experiments, calcium carbonate powder and chips completely react with excess hydrochloric acid. Which of the following graphs shows the relationship between the volume of carbon dioxide gas released against time? A.

B.

C.

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32. Which of the following half equations shows the reaction at the anode when dilute hydrochloric acid is being electrolysed ? A. 2Cl- (aq) Cl2 (g) + 2eB. 2H+ (aq) + 2eH2(g) C. 4OH-(aq) 2H2O(l) + O2 (g) + 4eD. 2O2-(aq) O2(g) + 4e33. 7.45g of potassium chloride dissolves in water to produce a solution of 0.5 mole dm-3. What is the volume of potassium chloride solution? [Relative atomic mass : K, 39; Cl; 35.5] A. 50 cm3 B. 75cm3 C. 100cm3 D. 200cm3 34. Diagram 7 shows the electron arrangement of an atom of element Y.

Diagram 7 What is the proton number of the atom of element Y? A. 1 B. 8 C. 9 D. 11 35. Isotopes has many applications in our daily life. Which of the following are tru