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1 [4541/1] [4541/2] [4541/3] Analysis Chemistry 99 Paper 1 Paper 2 Section A Section B Section C Paper Introduction to chemistry The structure of atom /2 1/ / Chemical formulae / and equation 1/3-1/ Periodic table of elements Chemical bond /2 1-1/ Electrochemistry Acids and bases Salts Manufactured substances in industry 10. Rate of reaction Carbon compound /2 1/ Oxidation and reduction Thermochemistry Chemical for consumer / Total KPT/JPS/DFT/USD20

100 Chemistry Paper 1 [4541/1] Each question is followed by either three, four or five options. Choose the best option for each question and then blacken the correct space on the answer sheet. 1. Which substance is an ionic compound?

2 100 Chemistry Paper 1 [4541/1] Each question is followed by either three, four or five options. Choose the best option for each question and then blacken the correct space on the answer sheet. 1. Which substance is an ionic compound? A Magnesium, Mg C Magnesium dioxide, MgO B Carbon dioxide, CO 2 D Tetrachloromethane, CCl 7. Diagram below shows the inter-conversion of the state of matter of a substance 2. What is the meaning of molecular formula? A Formula that shows the type of element in the compound B Formula that shows how the atoms of elements are bonded together C Formula that shows the simplest ratio of atoms of each element in the compound D Formula that shows the actual number of atoms of each element in the compound 3. The diagram shows the arrangement of particles in a substance in room temperature. This arrangement of particles can be found in A Zinc C Helium B Oxygen D Sodium chloride 4. Table below shows the number of neutrons for chlorine isotopes. What is the value of X? A 17 C 19 B 18 D Element Y has the same chemical property as the element with the electron number of 19. The letter of Y is not the actual symbol of the element. Which of the following is the electron arrangement for an atom of element Y? A 1 C B 2.1 D Which inter-conversion involves the absorb of energy? A water ice C steam water B ice steam D steam ice 8. The chemical formula for sodium thiosulphate is Na 2 S 2 O 3. What is its relative formula mass? [Relative atomic mass : Na = 23, S = 32, O = 16] A 39 C 142 B 71 D Calcium carbonate, CaCO 3 is the main component of marble. What is the number of particles in 0.5 mol of calcium carbonate? [Avogadro constant = 6.02 x mol -1 ] A 3.01 X C 3.01 X B 6.02 X D 3.01 X Which of the following gases contains 0.2 mol of atoms at room temperature and pressure? [1 mol of gas occupies the volume of 24 dm 3 at room temperature and pressure] A 4.8 dm 3 He C 4.8 dm 3 SO 3 B 4.8 dm 3 H 2 D 4.8 dm 3 CO Table below the melting point and boiling point of substance P, Q, R, and S. Which substance is a solid at room temperature? A P C R B Q D S 6. In the periodic table, J is below K in the same group. If the proton number of atom K is 12, what is the electron configuration for ion J? A 2 C B D The diagram shows the molecular formula for glucose. Which of the following is its empirical formula? A CH 2 O C C 2 H 2 O 2 B CH 2 O 2 D C 2 H 4 O 2

101 13. The following chemical equation shows the reaction between Which of the following statements is correct? A 2 mol of magnesium atoms react with 1 mol of oxygen atom.

3 The following chemical equation shows the reaction between Which of the following statements is correct? A 2 mol of magnesium atoms react with 1 mol of oxygen atom. B 2 mol of magnesium atoms react with 2 mol of oxygen gas. C 2 mol of magnesium atoms react with 1 mol of oxygen atom producing 2 mol of magnesium oxide molecules. D 2 mol of magnesium atoms react with 1 mol of oxygen molecules producing 2 mol of magnesium oxide molecules. 19. Elements X and Y dissolve in water to form acidic solutions which are also bleaching agents. What is element X and Y? I. Chlorine III. Iodine II. Bromine IV. Astatine A I and II C II and IV B I and III D III and IV 20. The table below shows the electron arrangement for elements W, X, Y and Z. The letters used are not the actual symbol of the elements. 14. The diagram shows the electron arrangement of atom Q. x x x Q x x x Where is element Q placed in the Periodic Table of Element? 15. Diagram below shows the electron arrangement of atom R and S. x x x x x x x x R x x x x x S x x x x x x x x x Which of the following is true about R and S? A Element R is more reactive than element S. B Both elements R and S react with bromine gas. C Both elements R and S are monoatomic gas. D Element R reacts with element S to perform a compound with formula RS. 16. What are the anions present in aluminium nitrate solution? A OH -, NO 3 - C Al 3+, NO 3 - B H +, Al 3+ D Al 3+, H +, OH -, NO Substance X form white precipitate when added sodium hydroxide and ammonia solution until excess. It is insoluble in both excess sodium hydroxide solution and ammonia solution. What is X? A Magnesium sulphate C Aluminium sulphate B Zinc sulphate D Lead (II) nitrate 18. Which statement explains why the size of Potassium atom is bigger than Lithium atom in the Periodic Table? A The number of protons in Potassium atom is greater than Lithium atom. B The relative atomic mass of potassium atom is greater than Lithium atom. C The number of valence electrons is same. D The number of shells filled with electrons for potassium is greater than lithium. Which of the following is an element that able to form an amphoteric oxide? A W C Y B X D Z 21. The diagram shows the electrolysis of molten lead (II) bromide using carbon electrodes. Which half equation shows the reaction at the anode? A B 22. The following elements located in Period 4 of the Periodic Table of Elements. C D Chromium, Cr Manganese, Mn Iron, Fe Cobalt, Co Nickle, Ni Copper, Cu Which of the following is true about the elements? A They have a low melting point. B They do not able to conduct electricity. C They are able to conduct heat. D They are able to show same oxidation numbers in their compounds. KPT/JPS/DFT/USD20

102 23. Diagram below shows the positions of elements P, Q, R, S and T in the Periodic Table. P, Q, R, S and T are not the actual symbol of the elements 27.

4 Diagram below shows the positions of elements P, Q, R, S and T in the Periodic Table. P, Q, R, S and T are not the actual symbol of the elements 27. Table below shows information about three chemical cells. Which of the following pairs of elements react to form an ionic compound? I. S, P III. R, T II. R, P IV. Q, T A I and II C II and IV B I and III D III and IV 24. Table below shows the proton number of elements E, F, G, and H. Based on table above, which two elements that form a compound with a high melting and a high boiling point? I. E, F III. F, H II. E, G IV G, H A I and II C II and IV B I and III D III only 25. Diagram below shows the set up of the apparatus to plate an iron key with silver. After 30 minutes, it is found that no plating took place on the iron key. What should be done to ensure electroplating takes place? A Use a bigger silver rod B Increase the cell voltage C Interchange the terminals in the cell D Rub the iron key with sand paper Which of the following is the correct descending order of these metals in the electrochemical series? A U, T, S, R C R, U, T, S B R, T, U, S D S, T, U, R 28. Glacial ethanoic shows acidic properties when it is dissolved in water. In which pairs of substances does a reaction occur? A Glacial ethanoic acid + ph paper B Glacial ethanoic acid + Magnesium ribbon C Glacial ethanoic acid + Calcium carbonate chips D Glacial ethanoic acid + Sodium carbonate solution 29. Which medicine can relieve a headache and paint in joint? A Aspirin C Streptomycin B Vinegar D Insulin 30. Sulphuric acid, H 2 SO 4 has the concentration of 0.5 mol dm 3. What is the volume of sodium hydroxide, NaOH, 1.0 mol dm 3 that can neutralize 25.0 cm 3 of sulphuric acid, H 2 SO 4, solution? A 6.25 cm 3 C cm 3 B cm 3 D cm A student is stung by an ant which contains acidic sting. Which of the following substances is the most suitable to be applied to the part stung to treat the student? A Magnesium hydroxide C Cooking oil B Vinegar D Sodium chloride 32. Diagram below shows the double decomposition reaction between solution X and solution Y. Which equation represents reactions to form a precipitate. I. AgNO 3 + NaCl AgCl + NaNO 3 II. ZnCl 2 + Na 2 SO 4 ZnSO NaCl III. CuSO4 + Na 2 CO 3 CuCO 3 + Na 2 SO 4 IV. CuSO 4 + Mg(NO 3 ) Cu(CO 3 )2 + MgSO Diagram below shows the setup of the apparatus to build a chemical cell. A I and II C II and IV B I and III D III and IV 33. The diagram shows a polymerization process. Which of the following metal can be replaced the iron nail to obtain the highest voltage reading? A Tin C Silver B Lead D Copper Which of the following properties is identical for substance P and Q? A Density C Melting point B Percentage composition D Relative molecular mass

5 Why is ceramic used for the wall of object that has higher temperature? A Ceramic is very hard B Ceramic is malleable C Ceramic is inert towards chemicals D Ceramic is very high melting point 35. The reaction between calcium carbonate and hydrochloric acid produces carbon dioxide gas. The reaction is complete in 50 seconds and the maximum volume of gas produce is 25 cm 3. What is the average rate of the reaction? A 0.5 cm s -1 C 2.0 cm s -1 B 1.0 cm s -1 D 4.0 cm s The equation shows the chemical change that occurs to compound F. + Which of the following is the compound F? A n butane C But 2 ene B Prop 1 ene D Butan 2 ol 41. The diagram below shows the molecular formula of pent 1 ene. 36. Zinc reacts with acid to produce hydrogen gas, H 2. Which solution would give the highest initial rate of reaction? A B 100 cm 3 of 1.0 mol dm -3 of nitric acid, HNO cm 3 of 1.0 mol dm -3 of hydrochloric acid, HCl C D 100 cm 3 of 1.0 mol dm -3 of sulphuric acid, H 2 SO cm 3 of 1.0 mol dm -3 of ethanoic acid, CH 3 COOH 37. Experiment I and Experiment II are carried out as follows: Which graphs of volume of carbon dioxide collected against time in both sets is correct? 38. Which of the following statements correctly related to the collision theory affected by rise in temperature on the reactant particles? I. The total surface area of the reactant particles increases II. The kinetic energy of the reactant particles increases III. The frequency of the collision between the reactant particles increases IV. The number of the reactant particles per one unit volume increases Which of the following are correct names for isomers of pent -1 ene? I. pent 2 ene III. pent 3 ene II. 3 methylbut 1 ene IV. 2 methylbut 2 ene A I and IV only C I, II, and IV only B II and III only D I, II, III, and IV 42. Natural rubber has to be treated first before it can be used to make car tire. What is the name of the process? A Hydrolysis C Vulcanization B Esterification D Polymerisation 43. Methods below are used to stop iron from rusting. Coating with zinc Coating with tin Connecting to magnesium rod Which metal is most often used to protect iron in water pipelines, roofing sheet, and in food containers? 44. A metal W lies between magnesium and iron in the reactivity series. Which reaction is W most likely to undergo? A It liberates hydrogen from dilute hydrochloric acid B It reduces magnesium oxide to magnesium on heating C Its forms a hydroxide which dissolves in water D Its oxide decomposes to give the metal on heating A I and II only C III and IV only B II and III only D I and IV only 39. Oils can be converted to fat by process Q. Which of the following is process Q? A hydrogenation C hydration B Halogenation D dehydration 45. Which statement is correct for all exothermic reactions? A The reactants gain energy from the surrounding. B The reactants of the reaction have more energy than the products. C The temperature of the reaction decreases. D The symbol for heat of reaction is ΔH = + kjmol -1 KPT/JPS/DFT/USD20

104 46. The reaction between 25 cm 3 of 0.5 mol dm -3 copper (II) sulphate solution, CuSO 4 and excess zinc releases 2625 J of heat. What is the temperature change of the mixture?

6 The reaction between 25 cm 3 of 0.5 mol dm -3 copper (II) sulphate solution, CuSO 4 and excess zinc releases 2625 J of heat. What is the temperature change of the mixture? [Specific heat capacity of solution = 4.2 J g -1 O C -1. Assume that 1cm 3 of a solution is equal to 1g of the solution] A 100C C 200C B 150C D 250C 49. Diagram below shows the experiment to determine the heat of neutralization. 47. Table below shows the heat of combustion of methanol, ethanol, and butanol. Which experiment gives the highest rise in temperature? What is the approximate value for the heat of combustion of propanol? A 1050 kjmol -1 C 3310 kjmol -1 B 2020 kjmol -1 D 3970 kjmol Why are soaps less effective than detergents? A Soaps decrease the wetting ability of water whereas detergents increase the wetting ability of water. B Soaps are biodegradable substances whereas detergents are non-biodegradable substances C Soaps form scum in hard water whereas detergents do not form scum in hard water. D Soaps are cheap to make whereas detergents are expensive to manufacture. 50. The diagram below shows the energy diagram for the precipitation of silver chloride. Which of the following is true about the diagram? I. The reaction is exothermic. II. The heat of reaction is 60.5 kj mol -1. III. The temperature increases during the reaction. IV. The energy content of the product is higher than the reactants. A I and II only C I, II, and III only B I and III only D I, II, III, IV END OF QUESTIONS PAPER

7 105 Chemistry Paper 2 [4541/2] SECTION A [60 marks] Answer All Questions 1. Table 1 shows the proton number and nucleon number of four atoms T, U, V, and W. Table 1 Based on Table 1: (a) (i) Write the arrangement of V atom. (b) (ii) (iii) How many valence electrons does an atom of U have? State the number of shells does an atom of T have. (iv) Draw the electron arrangement of atom U. Atom T reacts with oxygen to form a covalent compound. (i) State two physical properties of covalent compound. (ii) (iii) Write the chemical formula of covalent compound formed. Complete the realationship below. Nucleon number = proton number + [2 marks] [2 marks] KPT/JPS/DFT/USD20

8 The diagram below represents a reaction between hydrogen and oxygen to produce water. (a) (i) Name the type of particle present in water, H 2 O. (b) (ii) Calculate the relative molecular mass of water. [Relative atomic mass: H = 1; O = 16] 20g of hydrogen are reacting completely with excess oxygen to form water. (i) (ii) Write a balanced chemical equation for the reaction. Calculate the numbers of moles are the in 20g of hydrogen. (c) (i) Presence of water can showing the properties of acid. State the role of water in showing the properties of acid. (ii) Ethanoic acid, CH 3 COOH dissolved in propanone, CH 3 COCH, has no effect on blue litmus paper. Explain this observation. [2 marks] [2 marks] [2 marks]

9 E, F, G, H, J, K, and L are the symbols used to represent elements. They form compounds in which they exist as ions with the following formulae in the Table 3 Table 3 Based on Table 3: (a) State the Group of element F in the Periodic Table. (b) Which element is a noble gas? Explain your answer. (c) (i) State the elements is most likely to form coloured compound and gives a reason for your answer. (ii) Write the formulae of the two oxides this element is likely to for (d) (i) Which element forms an amphoteric oxide? (ii) Write the equation for the reaction of this Oxide with hydrochloric acid. [2 marks] [2 marks] [2 marks] [2 marks] KPT/JPS/DFT/USD20

10 Hydrogen sulphide is a compound of hydrogen and sulphur. Sulphur is an element found in Group 16 of the Periodic Table. (a) (b) What is a compound? Name two types of chemical bonds. (c) (i) What type of bond is formed between the hydrogen and sulphur atom? (ii) Draw the electron arrangement of the bond formed between hydrogen and sulphur atom. [2 marks] (d) (i) Hydrogen sulphide has the melting point of 850C and a boiling point of 610C. Write the physical state of hydrogen sulphide at 280C. (e) (ii) Draw the arrangement of particles in the substance in d (i). Hydrogen sulphide has the smell of rotten eggs but sodium sulphide has no smell. Explain why sodium sulphide has no smell? [2 marks]

109 5. The diagram below shows the reaction between magnesium with sulphuric acid. Diagram 5 (a) (i) Write the balance chemical equation for the reaction.

11 The diagram below shows the reaction between magnesium with sulphuric acid. Diagram 5 (a) (i) Write the balance chemical equation for the reaction. (b) (ii) Write an ionic equation for this reaction. [2 marks] In this reaction, which substance is (i) oxidised? = (ii) reduced? = (iii) oxidizing agent? = (iv) reducing agent? = [4 marks] (c) Magnesium also can react with copper (II) sulphate, CuSO 4 solution. The chemical equation as follows: (i) (ii) Write half-equations showing what happen to the reactants. Explain why this is a redox reaction. [2 marks] [2 marks] KPT/JPS/DFT/USD20

12 A student carried out an experiment to determine the heat of precipitation for the reaction between lead (II) nitrate, Pb(NO 3 ), solution and sodium sulphate, Na 2 SO 4 solution. In this experiment, 50 cm 3 of 2.0 mol dm -3 lead (II) nitrate solution was added to 50 cm 3 of 2.0 mol dm -3 sodium sulphate solution. The result are given below: (a) (b) (c) State the meaning heat of precipitation. Diagram 6 Why is a polystyrene cup used in the experiment? State the type of reaction that occurred in this experiment. (d) (i) State the colour of the precipitate formed in this experiment. (ii) Give the reason for observation in (d) (i). [2 marks] (e) (i) Complete the ionic equation for the reaction that occurred. (ii) Calculate the heat change of the precipitation reaction between lead (II) nitrate and sodium sulphate. [Specific heat capacity of solution = 4.2 Jg -1 O C -1. Assume that 1 cm 3 of a solution is equal to 1g of the solution] [2 marks] (iii) Calculate the heat of precipitation for this experiment. [2 marks]

13 111 SECTION B [20 marks] Answer any one Questions 7 (a) The following are three examples of chloride salts that can be prepared in the laboratory Silver chloride, AgCl Lead(II) chloride, PbCl2 Potassium chloride, KCI (i) From these examples, identify the soluble and insoluble salts [2 marks] (ii) State the reactants for the preparation of lead(ii) chloride, PbCl2 (b) (c) With the aid of a labelled diagram, explain the preparation of soluble salts which are potassium chloride, KCI Table 7 shows the observations from some tests carried out from salt X I. II. Table 7 Based on the information in table 7 : (i) Identify an anion that is present in Test I and describe a chemical test to verify the anion. [2 marks] [6 marks] [4 marks] (ii) Identify two cations that are present in Test II and describe a chemical test to verify the cations [6 marks] KPT/JPS/DFT/USD20

14 (a) What is meant by the heat of neutralisation? (b) Two experiments are carried out to compare the heat of neutralisation: neutralisation (i) (ii) (iii) Explain the difference of temperature changes between experiment I and experiment II. Calculate the heat change in Experiment I and Experiment II. [Specific heat capacity of solution = 4.2 Jg -1 o C -1. Assume that 1 cm 3 of a solution is equal to 1g of the solution] Based on Experiment I and Experiment II, explain both experiment according to their: Balanced equation Number of moles of water Heat of neutralisation [4 marks] [4 marks] [11 marks]

15 113 SECTION C [20 marks] Answer any one Questions 9. Diagram 9 shows the arrangement of particles of a compound in molten state and solid state. Diagram 9 (a) The compound can conduct electricity in molten state but cannot do so in solid state. Name one example of a compound with this property. (b) Write one of the two half equations for the electrolysis of the compound you named in 9(a). [3 marks] (c) (d) Draw a labeled diagram of the apparatus that u can use to electrolyse the compound you named in 9 (a). In your drawing show by using arrows the movement of particles that that occurs in the compound. Describe the electrolysis process that occurs in 9 (a). [10 marks] [6 marks] KPT/JPS/DFT/USD20

16 Table 10 shows the data from Experiment I and Experiment II that were carried out to study the rate of reaction of zinc with two acids, P and Q. Table 10 (b) (a) (i) By choosing either experiment I or Experiment II, state the name of the acid used. Write the chemical equation for the reaction of this acid with zinc. (ii) Draw an energy profile diagram for the reaction in 10 (a)(i). On the energy profile Diagram shows the: Heat of reaction, H Activation energy without a catalyst, Ea Activation energy with a catalyst, Ea Explain the energy profile diagram. Compare the rate of reaction between Experiment I and Experiment II. Explain the difference in the rate of reaction in the experiments accordingly to the collision theory. [2 marks] [10 marks] [8 marks] END OF QUESTIONS PAPER

115 Chemistry Paper 3 [4541/3] http://cikguadura.wordpress.com [50 marks] Answer All Questions 1. Diagram 1.1 shows the apparatus set up for the experiment, using metal P and copper.

17 115 Chemistry Paper 3 [4541/3] [50 marks] Answer All Questions 1. Diagram 1.1 shows the apparatus set up for the experiment, using metal P and copper. Given that copper is placed at the positive terminal. The reading of the voltmeter is recorded as shown in Diagram 1.2. RAJAH 1.1 / DIAGRAM 1.1 The experiment is repeated using metal Q, R, and S (one at a time) and copper. Voltmeter readings are shown below. RAJAH 1.2 / DIAGRAM 1.2 Based on the Diagram 1.2, construct a table to record the reading of the voltages. [3 marks] (b) Complete the Table 1 based on the experiment. (c) (d) Table 1 State one hypothesis for the experiment. Based on the observation shown in the above diagram, arrange metal P, Q, R, S, and copper in descending order of reactivity. [6 marks] [3 marks] [3 marks] (e) If another metal, T, which is a higher position then Q is used, predict the voltage which will be produced. [3 marks] KPT/JPS/DFT/USD20

116 2. Diagram 2.1 shows the set up of apparatus to study the reaction of metal oxides with carbon. Set-up of apparatus Observation on the mixture (a) Complete Diagram 2.

18 Diagram 2.1 shows the set up of apparatus to study the reaction of metal oxides with carbon. Set-up of apparatus Observation on the mixture (a) Complete Diagram 2.1 by stating the observations for the reaction of metal oxides with carbon powder. [3 marks] (b) (c) (d) Diagram 2.1 State all the variables in this experiment: Manipulated variable: Responding variable : Controlled variable : State the inference that can be made for this experiment. Based on the observations in Diagram 2.1, arrange metals M, Z, C, S and carbon in ascending order of reactivity. [3 marks] [3 marks] [3 marks] (e) The experiment is repeated by using the oxides of N with carbon powder. The result of the experiment is shown in Set-up of apparatus Observation on the mixture Diagram 2.2 How would you determine whether metal M or metal N is higher in the reactivity series? [3 marks]

117 3. Diagram 3 shows the conversation between a teacher and her students. Diagram 2 Based on the situation, plan a laboratory experiment to study the action of heat on nitrate salts.

19 Diagram 3 shows the conversation between a teacher and her students. Diagram 2 Based on the situation, plan a laboratory experiment to study the action of heat on nitrate salts. Your planning should include the following aspects: (a) (b) (c) (d) (e) Problem statement All the variables Statement of the hypothesis List of materials and apparatus Procedure for the experiment (f ) Tabulation of data [17 marks] END OF QUESTIONS PAPER KPT/JPS/DFT/USD20

20 Jawapan Chemistry 79 Chemistry Paper 1 KPT/JPS/DFT/USD20

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# Ans Workings / Remarks

# Ans Workings / Remarks 1 B Atomic mass and temperature affects the rate of diffusion of gas. The lower the atomic mass, the lighter the substance. The higher the temperature, the higher the rate of collision