Holy Innocents High 2023 End Year 2NA MCQ (Booklet A)

?”:> HOLY INNOCENTS’ HIGH SCHOOL Candidate Name Class Index Number END OF YEAR EXAMINATION 2023 SECONDARY 2 SCIENCE (Booklet A) Date: 9th Oct 2023 Duration: 1h 45 min Additional Materials: Optical Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction tape/fluid. Write your name, class and index number on the Answer Sheet in the spaces provided. There arethirty questions on this paper. Answerall questions. For each question there are four possible answersA, B, C and D. Choose theone you consider correct and record your choice insoft pencilon the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. 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. A copy of the Periodic Table is printed on page 2. The use of an approved scientific calculator is expected, where appropriate. You should not spend more than 50 mins on this booklet. Set by:Mrs Cynthia Chan Vetted by:Ms Woo Wei Shan and Mr Damien Lee This document consists of 12 printed pages (including cover page). N N A 30

2 The Periodic Table of Element 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 rutherfordiu m – 105 Db dubnium – 106 Sg seaborgium – 107 Bh bohrium – 108 Hs hassium – 109 Mt meitnerium – 110 Ds darmstadtiu m – 111 Rg roentgenium – 112 Cn copernicium – 114 Fl flerovium – 116 Lv livermorium – lanthanoids 57 La lanthanum 139 58 Ce cerium 140 59 Pr praseodymiu m 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 mendeleviu m – 102 No nobelium – 103 Lr lawrencium –

3 Answer all questions. For each question, there are four possible answers,A, B, Cand D. Choose the one you consider correct and record your choice in soft pencil on the separate answer sheet. 1 Which of the following statements about energy is/are true? I Energy is the ability to do work. II The SI unit for energy is kilowatt-hour. III Energy cannot be converted from one form to another. IV Energy can be created and destroyed. A I only B III only C I and II D I and IV 2 Which of the following examples shows no work done? A pulling out weed in a garden B climbing down a ladder C jumping across a hurdle D pushing with one’s body against a large tree 3 Look carefully at the diagram below. What energy change is occurring because of the presence of the magnifying glass? A heat energy is changed to light energy B light energy is changed to heat energy C light energy is changed to chemical energy D solar energy is changed to light energy

4 4 The diagram below shows four blocks of identical wood. Each block of wood is shaded and weighs 100 N. Each block of wood is supported by different number of supports of different thickness. The amount of pressure exerted by each block of wood on the supports is different. Which of the arrangements show the blocks of wood exerting the largest pressure to the smallest pressure on the supports? A P, Q, R, S B R, Q, S, P C P, S, Q, R D Q, R, S, P 5 The temperature of the water in the beaker is 15 °C. Some water at 70 °C is poured into the beaker. What is the final temperature of the water in the beaker? A 15 °C B 70 °C C 85 °C D between 15 °C and 70 °C 6 Divers wear rubber or nylon suits to stay warm. Which of the following best explains the reason? I The materials are light and allow heat loss through perspiration. II The materials are good heat insulators. III The layer of air trapped beneath the materials is a good insulator of heat. IV The materials’ smooth surface is a poor conductor of heat. A I and IV only B II and III only C I, II and III only D all of the above 70 °C 15 °C

5 7 The main reason for the presence of the vacuum is to prevent heat transfer due to A convection and conduction. B convection and radiation. C conduction and radiation. D conduction, convection and radiation. 8 In the circuit , the below, voltmeter measures the potential difference across A X only. B Y only. C X and Y. D Z only. 9 The diagram below shows two common electrical fixtures in a household. Which of the following comparisons between P and Q is true? P Q A for measuring how much electricity has been used all the switches will turn off automatically when no electricity is being used B for measuring how much electricity has been used the switch will turn off by itself when the current is too large C to save electricity, meter will reset to zero when the current is too large for measuring how much electricity has been used D the switch will turn off by itself when the current is too large to save electricity, meter will reset to zero when the current is too large P Q

6 10 John did not want to miss his favourite television series and music so he brought both his television set and radio into the bathroom. He watches the television and listens to the radio at the same time while he is in the bath. As his best friend, what should you advise him? A never watch the television and listen to the radio at the same time B never use the television and radio in the bathroom because the signal reception is poor C never use the television and radio in the bathroom because the sound effect is bad D never use the television and radio in the bathroom because it is dangerous to use electrical appliances in wet places 11 Which of the following changes are caused by exposure to heat? I boiling of alcohol II burning of charcoal III decomposition of silver bromide on X-ray film IV producing glucose by green plants A I and II only B II and IV only C II, III and IV only D all the above 12 Which of the following is a reversible change? A burning of a matchstick B mercury rises in the thermometer C heating of sugar to form carbon D frying of an egg 13 The diagram shows the pH ranges of three indicators, methyl orange, bromothymol blue and

7 methyl red. What colour would be observed if a few drops of all three indicators are added to a sample of distilled water? A blue B green C orange D yellow 14 Poisonous carbon monoxide is found in the car exhaust fumes because A it is present in petrol. B it is present in the air taken in by the engine. C it is formed when petrol burns incompletely with insufficient supply of oxygen