Copy of MGS Chemistry P1

Page 2 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 1 The diagram shows the setup for a chemical reaction which produces a gas. The gas is then dried and collected. What could the gas be? A carbon dioxide B hydrogen C oxygen D sulfur dioxide 2 The melting and boiling points of the gases in a sample of air are shown. gas melting point / °C boiling point / °C oxygen -219 -183 argon -189 -186 nitrogen -210 -196 At which temperature will the sample of air contain oxygen as the only liquid? A -174°C B -187°C C -215°C D -222°C 3 Which of the following pairs of substances can be separated by heating? A ammonium chloride and iodine B ammonium chloride and potassium iodide C copper (II) nitrate and potassium iodide D copper (II) nitrate and sodium chloride calcium oxide gas collected

Page 3 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 4 The following diagrams can be used to illustrate the following. 1 a mixture of elements and compounds 2 a mixture of elements 3 molecules of an element 4 molecules of a compound W X Y Z What is the correct order of the diagrams? 1 2 3 4 A Y Z X W B Z Y X W C Z Y W X D Z X W Y 5 A student wrote the following statements in her test script: statement 1: “Hydrogen chloride has a lower boiling point than calcium chloride as covalent bonds are weaker than electrostatic forces of attraction.” statement 2: “In a gaseous sample of methane, the intermolecular forces of attraction between the CH4 molecules are weak.” statement 3: “In silicon dioxide, all valence electrons of silicon are used in the making of covalent bonds.” Which of the above statements are correct? A statement 1 and statement 2 B statement 1 and statement 3 C statement 2 and statement 3 D statement 1, 2 and 3

Page 4 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 6 The table shows the proton number and nucleon number of elements M and N. element proton number nucleon number M 13 27 N 8 16 When M and N react to form a compound, what will be the mass of one mole of the compound? A 43 B 70 C 102 D 113 7 The relative masses and relative charges of particles V to Z are shown in Fig.1 and Fig. 2 respectively. Which of the following statements are correct? 1 W represents an electron. 2 X represents a hydrogen ion. 3 Z represents the nucleus of a helium atom. 4 V and Y represent the nuclei of isotopes. A 1 and 2 only B 2 and 3 only C 1, 2 and 4 only D 2, 3 and 4 only 8 Which statement best explains why brass, made of copper and zinc, is suitable to make music instruments compared to pure copper? A The zinc atoms form strong metallic bonds with copper atoms in brass. B The zinc atoms have more valence electrons than copper atoms. C The zinc atoms prevent layers of copper atoms from sliding over each other. D The zinc atoms prevent the ‘sea of electrons’ from moving freely. V W X Y Z relative mass relative charge Fig. 1 1 2 3 4 0 +1 0 -1 -2 +2 V W X Y Z Fig. 2

Page 5 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 9 A 286 g sample of hydrated copper(II) sulfate contains 126 g of water of crystallisation. What is the correct formula of this compound? A CuSO43H2O B CuSO4 5H2O C CuSO47H2O D CuSO49H2O 10 Aqueous sodium hydroxide reacts with a certain metal chloride, MCln solution according to the equation given. MCln + nNaOH  M(OH)n + nNaCl 10.0 cm 3 of 3.00 mol/dm 3 NaOH solution were found to react with 10.0 cm 3 of 1.50 mol/dm3 MCln solution. What is the formula of the metal chloride? A MCl B MCl2 C MCl3 D MCl4 11 Sulfur dioxide can react with oxygen to form sulfur trioxide as shown. 2SO2 (g) + O2 (g)  2SO3 (g) If 200 cm3 of sulfur dioxide is reacted with 200 cm3 of oxygen, what is the volume of gases remaining after the reaction? A 100 cm3 B 200 cm3 C 300 cm3 D 400 cm3 12 An aqueous solution has a pH of 14. What does this imply about the concentration of ions present in the solution? concentration of OH- ions concentration of H+ ions A high low B high none C low high D low none

Page 6 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 13 Which of the following equations suggests that the underlined oxide has amphoteric properties? A Ga2O3 + 2NaOH  2NaGaO2 + H2O B Li2O + H2O  2LiOH C CuO + 2HCl  CuCl2 + H2O D Cl2O + 2NaOH  2NaClO + H2O 14 Which of the following salts can be prepared using the same method? A calcium sulfate, zinc chloride, B copper(II) sulfate, silver nitrate C potassium nitrate, magnesium nitrate D potassium iodide, silver iodide 15 The graph shows the optimal yield of ammonia at 450°C and 250 atm. Which of the following graphs shows a correct comparison of the yield of ammonia produced at temperature of 500°C and 250 atm? A B C D yield of ammonia time yield of ammonia time 450°C 500°C yield of ammonia time 450°C 500°C yield of ammonia time 450°C 500°C yield of ammonia time 450°C 500°C 450°C

Page 7 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 16 Several tests are performed on an unlabelled bottle containing an aqueous sample. Which of the following results is likely to correspond to iron(II) chloride? test 1: add dilute nitric acid, then aqueous silver nitrate test 2: add dilute nitric acid, then aqueous barium nitrate test 3: add aqueous sodium hydroxide dropwise, then add in excess A no visible reaction white precipitate formed green precipitate formed, does not dissolve in excess sodium hydroxide B no visible reaction white precipitate formed reddish-brown precipitate formed, does not dissolve in excess sodium hydroxide C white precipitate formed no visible reaction green precipitate formed, does not dissolve in excess sodium hydroxide D white precipitate formed no visible reaction reddish-brown precipitate formed, does not dissolve in excess sodium hydroxide 17 Disproportionation is a reaction in which the same element is both oxidised and reduced. Which reaction is not an example of disproportionation? A Cl2 + 2NaOH → NaCl + NaOCl + H2O B 2CuCl → CuCl2 + Cu C 2H2O2 → 2H2O + O2 D 2Pb(NO3)2 → 2PbO + 4NO2 + O2 18 In an electrolysis experiment, the same amount of charge deposited 19.2 g of copper and 9 g of scandium. The charge on the copper ion is +2. [Ar: Sc, 45; Cu, 64] What was the charge on the scandium ion? A +1 B +2 C +3 D +4

Page 8 of 16 Methodist Girls’ School Chemistry Paper 1 Sec 4 Preliminary Examination 2024 19 Which property is not typical of transition metals? A They exhibit variable oxidation states. B They form coloured compounds. C They have high melting points D They have low densities. 20 The electrolysis set-up shown is incomplete. What should be shown at X when the solution has been electrolysed for some time? A B C D 21 Lithium and rubidium are both in Group 1 of the Periodic Table. Which statement is correct? A Lithium atoms and rubidium a