九天国际教育GCSE真题June 2017 (v3) QP - Paper 2 CIE Chemistry IGCSE

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1、PMTCambridgeInternationalExaminationsCambridgeInternationalGeneralCertificateofSecondaryEducationCHEMISTRY0620/23Paper2MultipleChoice(Extended)May/June201745minutes*0971587250*AdditionalMaterials:MultipleChoiceAnswerSheetSoftcleaneraserSoftpencil(typeBorHBis

2、recommended)READTHESEINSTRUCTIONSFIRSTWriteinsoftpencil.Donotusestaples,paperclips,glueorcorrectionfluid.Writeyourname,CentrenumberandcandidatenumberontheAnswerSheetinthespacesprovidedunlessthishasbeendoneforyou.DONOTWRITEINANYBARCODES.Therearefortyquestions

3、onthispaper.Answerallquestions.ForeachquestiontherearefourpossibleanswersA,B,CandD.ChoosetheoneyouconsidercorrectandrecordyourchoiceinsoftpencilontheseparateAnswerSheet.ReadtheinstructionsontheAnswerSheetverycarefully.Eachcorrectanswerwillscoreonemark.Amarkw

4、illnotbedeductedforawronganswer.Anyroughworkingshouldbedoneinthisbooklet.AcopyofthePeriodicTableisprintedonpage16.Electroniccalculatorsmaybeused.ThesyllabusisapprovedforuseinEngland,WalesandNorthernIrelandasaCambridgeInternationalLevel1/Level2Certificate.Thi

5、sdocumentconsistsof15printedpagesand1blankpage.IB1706_0620_23/3RP©UCLES2017[TurnoverPMT21SmallcrystalsofpurpleKMnO4(Mr=158)andorangeK2Cr2O7(Mr=294)wereplacedatthecentresofseparatepetridishesfilledwithagarjelly.Theywerelefttostandunderthesamephysicalcondition

6、s.Aftersometime,thecolourofeachsubstancehadspreadoutasshown.dish1dish2KMnOKCrO4227Thelengthsofthearrowsindicatetherelativedistancestravelledbyparticlesofeachsubstance.Whichstatementiscorrect?ADiffusionisfasterindish1becausethemassoftheparticlesisgreater.BDif

7、fusionisfasterindish2becausethemassoftheparticlesisgreater.CDiffusionisslowerindish1becausethemassoftheparticlesissmaller.DDiffusionisslowerindish2becausethemassoftheparticlesisgreater.2Acompound,X,hasameltingpointof71°Candaboilingpointof375°C.Whichstatement

8、aboutXiscorrect?AItisaliquidat52°Candagasat175°C.BItisaliquidat69°Candagasat380°C.CItisaliquidat75°Candagasat350°C.DItisaliquidat80°Candagasat400°C.©UCLES20170620/23/M/J/17PMT33Astudentusedchrom