Sec 1 2024 Yio Chu Kang Secondary School Science EOY

Name: Index Number: Class/LG:YIO CHU KANG SECONDARY SCHOOLEND-OF-YEAR EXAMINATION 2024 SECONDARY ONESCIENCE_G31 hour 30 minutesAdditional Materials: Optical Answer Sheet (OAS)1 October 2024(Tuesday)READ THESE INSTRUCTIONS FIRSTWrite your name, index number and class on the cover page.Write in dark blue or black pen.You may use a soft pencil for any diagrams or graphs.Do not use staples, paper clips, glue or correction fluid.SECTION A: Multiple Choice QuestionsThis section consists of fifteenmultiple choice questions. Answer allquestions.For each question there are four possible answers A,B,CandD. Choose the one you consider correct and record your answer in soft pencil in the separate OAS. A mark will not be deducted for a wrong answer.SECTION B: Structured QuestionsThis section consists of structured questions. Answer all questions.Write your answers in the spaces provided.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.A copy of the Periodic Table is printed on page 24. For Examiner’s UseSection A/ 15Section B/ 65Total/ 80Setter: Mrs Chua Xiao YunThis document consists of 21printed pages and3blank pages. www.KiasuExamPaper.com 258

2 LSS G3 END-OF-YEAR EXAMINATION 2024 SECTION A: Multiple Choice Questions [15 marks]Answer allquestions in soft pencil on the separate OAS.1Which of the following is nota responsible application of scientific knowledge?Athe use of antibiotics to treat bacterial infectionBthe use of banned drugs in sports to improve performanceCthe use of solar energy to generate electricityDthe use of vehicles to go from one place to another2What are the physical properties associated with plastic materials?Abrittle, flexible and elasticBpoor conductors of heat, easily moulded and strongCshiny, does not corrode and has low densityDstrong, transparent and has high melting point3Two properties of four substances, W,X,Yand Zare shown in the table below. substance melting point / °C electrical conductivitysolid liquidW1100 good goodX1234 nil goodY2027 nil nilZ15 nil nilWhich of the following substances is most likely a metal?ASubstance WBSubstance XCSubstance YDSubstance Z4Which of these substances would you be able to conclude that it is an element?AA shiny liquid which is a good conductor of electricity.BA shiny solid which cannot be broken down into simpler substances.CA white powder which breaks down and gives off a colourless gas on heating.DA yellow powder which burns to produce a colourless acidic gas.www.KiasuExamPaper.com 259

3 LSS G3 END-OF-YEAR EXAMINATION 2024 5Which of these factors would cause a substance to dissolve faster?I stirringII using a smaller volume of solventIII using smaller size of the substanceAI onlyBI and IIICII and IIIDall of the above6Which diagram correc