2024 XMS SEC4 WA2 QP

This document consists of 11 printed pages and 0 blank page(s). XINMIN SECONDARY SCHOOL SEKOLAH MENENGAH XINMIN Weighted Assessment 2 2024 CANDIDATE NAME CLASS INDEX NUMBER CHEMISTRY Secondary 4 Express Setter: Ms Tiffany Lim Vetter: Mr Lim Boon Ping 6092 Term 2 Week 7 40 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name, class and index number on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. Section A: Multiple Choice Questions (5 marks) Answer all questions. For each question, there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in the boxes at the end of the Section. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. Section B: Structured Questions (10 marks) Section C: Free Response Questions (15 marks) Answer all questions. The number of marks is given in brackets [ ] at the end of each question or part question. The use of an approved scientific calculator is expected, where appropriate. For Examiner’s Use Section A 5 Section B 10 Section C 15 Total 30 Parent’s Signature

The Periodic Table of Elements Group 1 2 13 14 15 16 17 18 Key 1 H hydrogen 1 2 He helium 4 3 Li lithium 7 4 Be beryllium 9 proton (atomic) number atomic symbol name relative atomic mass 5 B boron 11 6 C carbon 12 7 N nitrogen 14 8 O oxygen 16 9 F fluorine 19 10 Ne neon 20 11 Na sodium 23 12 Mg magnesium 24 3 4 5 6 7 8 9 10 11 12 13 Al aluminium 27 14 Si silicon 28 15 P phosphorus 31 16 S sulfur 32 17 Cl chlorine 35.5 18 Ar argon 40 19 K potassium 39 20 Ca calcium 40 21 Sc scandium 45 22 Ti titanium 48 23 V vanadium 51 24 Cr chromium 52 25 Mn manganese 55 26 Fe iron 56 27 Co cobalt 59 28 Ni nickel 59 29 Cu copper 64 30 Zn zinc 65 31 Ga gallium 70 32 Ge germanium 73 33 As arsenic 75 34 Se selenium 79 35 Br bromine 80 36 Kr krypton 84 37 Rb rubidium 85 38 Sr strontium 88 39 Y yttrium 89 40 Zr zirconium 91 41 Nb niobium 93 42 Mo molybdenum 96 43 Tc technetium – 44 Ru ruthenium 101 45 Rh rhodium 103 46 Pd palladium 106 47 Ag silver 108 48 Cd cadmium 112 49 In indium 115 50 Sn tin 119 51 Sb antimony 122 52 Te tellurium 128 53 I iodine 127 54 Xe xenon 131 55 Cs caesium 133 56 Ba barium 137 57–71 lanthanoids 72 Hf hafnium 178 73 Ta tantalum 181 74 W tungsten 184 75 Re rhenium 186 76 Os osmium 190 77 Ir iridium 192 78 Pt platinum 195 79 Au gold 197 80 Hg mercury 201 81 Tl thallium 204 82 Pb lead 207 83 Bi bismuth 209 84 Po polonium – 85 At astatine – 86 Rn radon – 87 Fr francium – 88 Ra radium – 89–103 actinoids 104 Rf rutherfordium – 105 Db dubnium – 106 Sg seaborgium – 107 Bh bohrium – 108 Hs hassium – 109 Mt meitnerium – 110 Ds darmstadtium – 111 Rg roentgenium – 112 Cn copernicium – 113 Nh nihonium – 114 Fl flerovium – 115 Mc moscovium – 116 Lv livermorium – 117 Ts tennessine – 118 Og oganesson – lanthanoids 57 La lanthanum 139 58 Ce cerium 140 59 Pr praseodymium 141 60 Nd neodymium 144 61 Pm promethium – 62 Sm samarium 150 63 Eu europium 152 64 Gd gadolinium 157 65 Tb terbium 159 66 Dy dysprosium 163 67 Ho holmium 165 68 Er erbium 167 69 Tm thulium 169 70 Yb ytterbium 173 71 Lu lutetium 175 actinoids 89 Ac actinium – 90 Th thorium 232 91 Pa protactinium 231 92 U uranium 238 93 Np neptunium – 94 Pu plutonium – 95 Am americium – 96 Cm curium – 97 Bk berkelium – 98 Cf californium – 99 Es einsteinium – 100 Fm fermium – 101 Md mendelevium – 102 No nobelium – 103 Lr lawrencium – The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.). The Avogadro constant, L = 6.02 x 1023 mol-1

3 XMSS/Chemistry/6092/WA2 2024 Section A [5 marks] Answer all questions. Write your answers in the boxes provided at the end of the section. 1 The scheme below shows the reactions of salt F. What is the identity of salt F? A copper(II) chloride B copper(II) iodide C iron(III) chloride D iron(III) iodide 2 Dissolving potassium iodide in water is an endothermic process. Which of the graphs below shows how the temperature changes when potassium iodide is stirred with water until there is no further change of temperature? [R.T. = room temperature] A B C D

4 XMSS/Chemistry/6092/WA2 2024 3 The elements W, X, Y and Z have increasing proton numbers. They are all in Period 3 of the Periodic Table but are not necessarily next to each other. Which statement is correct? A W and Z will both react with oxygen to form basic oxides. B X has more non-metallic character than Z. C Y has a greater number of electron shells than W. D Z forms bonds by sharing electrons with chlorine. 4 The reaction between lead(II) oxide and ammonia is shown. PbO + 2NH3 → N2 + 3H2O + 3Pb Which element has been reduced? A H B N C O D Pb 5 Some properties of metal H are listed. • H reacts slowly with cold water. • H reacts with dilute hydrochloric acid. • No reaction occurs when the oxide of H is heated with carbon. What is a possible identity of metal H? A copper B iron C magnesium D potassium Question 1 2 3 4 5 Answer

5 XMSS/Chemistry/6092/WA2 2024 Section B [10 marks] Answer all questions. Write your answers in the spaces provided. 6 Fig. 6.1 shows part of a Periodic Table. Fig. 6.1 Answer the questions by using only the symbols of elements shown in the diagram. Each element can be used once, more than once or not at all. 1 2 13 14 15 16 17 18 He B C N F Ne Na 3 4 5 6 7 8 9 10 11 12 S Cl Ar K Ti Ni Br (a) Which two elements react vigorously with cold water? …………………………………………………………………………………………….. [1] (b) Which element is a reddish-brown liquid at room temperature? …………………………………………………………………………………………….. [1] (c) Which element is able to displace chlorine from an aqueous solution of sodium chloride? …………………………………………………………………………………………….. [1] (d) Which two metallic elements have variable oxidation states? …………………………………………………………………………………………….. [1] [Total: 4]

6 XMSS/Chemistry/6092/WA2 2024 7 (a) Three experiments A, B and C were set up as shown in Fig 7.1 below to investigate the corrosion of iron. All the metals are immersed in water and exposed to air. In experiment B and C, the two metals are in contact. Fig 7.1 Some observations were recorded in the table below. experiment is there corrosion observed on iron metal? what is observed on surface of the iron metal? A yes red-brown deposits B C (i) Complete the table above for Experiment B and Experiment C. [2] (ii) Which of the above experiments show s that iron is protected from corrosion? Name the method of protection and explain how the protection of iron is achieved. ……………..……………………………………………………………………….. …………………..………………………………………………………………….. ……………..……………………………………………………………………….. …………………..………………………………………………………………….. [2] Fe