+256704981488ivanmwesigwa 11 Candidate’sname;.............................................................................................. Signature;................................................................stream............................... 545l1 CHEMISTRY Paper1 2hours UGANDACCERTIFICATEOFEDUCATION PRE-REGISTRATION2026 S4CHEMISTRY PAPER1 2hours Instruction. ThepaperconsistofsectionA andB.SectionAhastwo compulsoryitems.Responsesto befilledinthespaceprovided. SectionBhastwopartsIand II.Answeroneitemfromeach part.Responsestobefilledin answerbookletprovided. UseC=12,H=1,O=16, 1moleofthegasoccupies 22400cm3Forscorer’suseonly Item NoBasis codeWeighted scoreScorer’s initial 1 T D E 2 C X I _(3/4)P S B _(5/6)N M BE Totalweight score. +256704981488ivanmwesigwa 22 SECTIONA Itemone CurrentlyUgandahasnonuclearpowerplant,howeverthereare stepstakentoconstructoneinBuyendedistricttogenerate 2,000MWofelectricityby2031. AcasestudyhasbeendoneonUranium-232minearoundKuyuriver inTanzaniabyUgandangovernment.Initsresearch,watersamples werecollectedinthenearbywaterpointsandthiscontainedsome uraniumparticles.Somedatawascapturedasshownintable1. Time(days) 05101520 Countrateperday295158864725 Table1. ResidentsofBuyendehaveraisedconcernsonpossible environmentalrisksassociatedwiththeplantandsomeare inquisitiveonhow2,000MWwillbegenerated. Asaresult,thegovernmenthasheldaradio-talkshowononeofthe localradiostationstosensitizethelocalsontheissueathand. Youlistenedtothattalkshow.However,oneofyourclassmates misseditandhasrequestedyoutobriefhimontheentiretalkshow. Task;Inyourbriefingasalearnerofchemistry, (a)Identifytheprocessundergonebyparticlesinwatersample ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ +256704981488ivanmwesigwa 33 (b)Explainhow2,000MWwillbegenerated. ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ (c)Usinggraphicalapproach,determinethehalf-lifeoftheparticles identifiedinwatersample.(useagraphpaperattached) ___________________________________________________ ___________________________________________________ ___________________________________________________ (d)ExplaintheconcernsraisedbytheresidentsinBuyendedistrict. ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ +256704981488ivanmwesigwa 44 Item2 Anewlyrecruitedlaboratorytechnicianhasrequestedsomesenior threeboystohelphimre-organizechemicalsinthelaboratory.The boysfoundanoldbottleonthefloorwhoselabelhadscratchesonit andhadsomeinformationonitthatwasn’tclear.Thebottlehadthe following Composition Carbon=52.2% Hydrogen=13% Oxygen=..............% Molecularmass=46 Theboysareinquisitivetoknowthecompoundinthebottle,and theybroughtittou. Task:usingyourknowledgeofchemistryyouhaveattained, a)Explainthecategoryoftheelementspresentinthecompound. ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ b)Determinethesimplestformulaofthecompound. ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ +256704981488ivanmwesigwa 55 ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ c)Suggestthepropertiesofthecompoundandhenceit’sother use. ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ d)Explaintheimpactofthecompoundtotheenvironment. ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ +256704981488ivanmwesigwa1 1SECTIONB PartI (respondtooneiteminthepart) Item3 InLiradistrict,localsgrowalotofsunflower.Asresult,agroupof youthinthedistrictrecentlyobtainedaloanfromabankto establishasoapydetergentfactory.Thelocalresidentsarehowever, protestingtheestablishmentoftheplantintheirarea,claimingthat theplantwillgreatlyimpactontheirenvironmentandthereisno importanceofaplanttothem.Thelocalsarealsowonderinghowthe detergentproductionwillbedone.Asaresult,theyouthshelda radio-talkshowononeofthelocalradiostationsandsensitizedthe localsontheissueathand.Youlistenedtothattalkshow.However, oneofyourclassmatesmisseditandhehasrequestedyoutobrief himontheentiretalkshow. Task; AsChemistrylearner,writeabriefmessagethatyouwillsharewith yourfriend. Item4 DuetovastironoredepositsinMuko,Kabaledistrict,government hasclearedoneoftheforeigninvestorstosetup,anironproduction plantinthearea.However,thecommunityisconcernedaboutits negativeimpact.Theyarealsowonderingifthereanyothersocial benefitsassociatedwiththeplantapartfromjobopportunities. Thelawalsorequiresthatthelocalsshouldbesensitizedaboutthewhole process. +256704981488ivanmwesigwa2 2YourChemistryteacherhasbeenaskedtocarryoutthe sensitizationandshehasgivenyouanassignmenttoprepareforher awrite-upforsensitization. Task; AsaChemistrylearner,makeawrite-upfortheteacher. PartII (Respondtooneitemfromthispart). Item5. TheairinandaroundJinjaDistrictishighlypolluted.Thelocal hospitalhasreportedanincreaseinrespiratoryissuesandother healthproblemsrelatedtoairpollution. Thisisduetoincreasingpopulationwhichhascausedariseingas emissionsfrommotorvehiclesandindustries.TheDistrict EnvironmentalClub(DEC)towhichyouareamemberof,hasgot concernedaboutthisdevelopment.Therefore,theDECisplanningto createawarenesstothepeoplethroughsensitizationworkshops organizedinthedifferentvillageswithinthedistrict Task. AsaChemistrylearner,prepareashortpresentationthatyouwill deliverduringtheworkshop. Item6 Naturalforestsandfreshwaterbodieslikelakesandrivershave beenheavilyencroachedonbecauseofrapidurbanization.Asa result,onWorldEnvironmentDay,theUgandangovernment,through NationalEnvironmentalManagementAuthority(NEMA),wishesto raisepublicawarenessamongthecitizensontheongoing developments. +256704981488ivanmwesigwa3 3Yourschoolisamongtheschoolsselectedfortheattendandmakea presentationontheWorldEnvironmentDay.Thethemefortheday is“NATURALRESOURCESAREBASICNECESITIES”.The scienceclubatyourschoolhasselectedyoutogiveapresentation ontheoccasion. TASK;Writetheshortmessageyouwilluseduringthecelebrations. End
