Copy of PLMGSS 2024 4E Chem P1 QP

[Turn over CANDIDATE NAME CLASS CLASS INDEX NO CENTRE NUMBER S INDEX NUMBER CHEMISTRY 6092/01 Paper 1 Multiple Choice 26 August 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and class index number on the separate Answer Sheet in the spaces provided. There are forty questions on this paper. 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 soft pencil on the separate Answer Sheet. 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 paper. A copy of the Periodic Table is printed on page 2. The use of an approved scientific calculator is expected, where appropriate. This document consists of 18 printed pages Paya Lebar Methodist Girls’ School (Secondary) Preliminary Examination 2024 Secondary 4 Express / G3

2 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 – 114 Fl flerovium – 116 Lv livermorium – 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 –

3 Multiple Choice Questions (40 marks) 1 A student wants to investigate the strength of an unknown monobasic acid, as compared with a sample of hydrochloric acid which has the same concentration. Which of the following correctly shows the method and apparatus needed to investigate strength of the unknown acid? method apparatus A measure pH voltmeter B measure volume of sodium hydroxide needed for neutralisation burette and pipette C measure temperature change when acid reacts with metal thermometer D measure final volume of gas produced when acid reacts with metal gas syringe 2 The diagram below shows an experimental set-up that can be used to obtain a stream of nitrogen from air. Using this set-up, which set of substances labelled X, Y and Z gives the purest sample of nitrogen? X Y Z A aqueous calcium hydroxide calcium chloride solution sulfur B calcium chloride solution aqueous calcium hydroxide copper C concentrated sulfuric acid sodium hydroxide solution carbon D sodium hydroxide solution concentrated sulfuric acid copper [Turn Over

4 3 A scientist tested a skincare product to investigate if it contains harmful ingredients. The chromatogram of the skincare product is obtained as shown below, along with a reference table of Rf values of some harmful ingredients. What are the harmful ingredients present in the skincare product? A diethanolamine only B diethanolamine and oxybenzone only C hydroquinone and butylated hydroxyanisole only D hydroquinone and oxybenzone only 4 Two gases, CH3Cl and SO2, were separately released from one end of a laboratory on a hot day. The experiment was repeated on a cold day. The time taken for the gases to reach the opposite end of the laboratory was recorded for each experiment. Which gas on which day would take the shortest time to reach the end of the laboratory? gas day A CH3Cl hot B CH3Cl cold C SO2 hot D SO2 cold ingredient Rf value diethanolamine 0.3 hydroquinone 0.5 butylated hydroxyanisole 0.8 oxybenzone 0.9

5 5 The graph below shows the change in temperature as a sample of X2 is cooled. Which stage (P to U) reflects a change in the movement of particles from moving around each other to vibrating about in fixed positions? A P to Q B Q to R C R to S D S to T 6 In which particle are the number of protons, neutrons and electrons all different? A O2− B Mg2+ C Ne D P3− 7 Element M exists as 3 stable isotopes and has a relative atomic mass of 65.1. Which row shows the correct compositions of isotopes? 64 M 66 M 67 M A 32.1% 56.4% 11.5% B 54.6% 6.6% 38.8% C 56.3% 31.3% 12.6% D 53.5% 25.5% 21.2% [Turn Over

6 8 The formula of an ionic compound, containing elements J, K and L is shown below. The letters J, K and L are not the chemical symbols of the elements. Which statements are correct? I. Element J could be magnesium. II. Element K belongs to Group 14 of the Periodic Table. III. Element L belongs to Group 1 of the Periodic Table. IV. Element K and element L are bonded together by a covalent bond. A I and II B I and IV C II and III D I, III and IV 9 Chloroacetone is used to make dye couplers for colour photography. Which statements about chloroacetone are correct? I. Chloroacetone cannot conduct electricity in any state. II. Chloroacetone has high boiling point. III. The total number of electrons that are involved in bonding in one chloroacetone molecule is 10. IV. The chlorine atom has 6 valence electrons which are not involved in bonding. A I and II B I and IV C II and III D I, III and IV

7 10 In the lattice structure of ionic compounds, the coordination number of each