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1、北京101中学初三化学期末考试人教版(2)Beijing101middleschooljuniorchemistryfinalexamTherelativeatomicmassthatmightbeused:Hminus1,c-12,n-14,o-16,Na-23,Mg-24,al-27,s-32,cl-35.5,k-39,ca-40,mn-55,fe-56,thecu-64VolumeI(45points)One.Thechoice(35points,1ineverylittlequestion).Thefollowingarechemicalchanges()A.theoreiscrush
2、edb.theairisliquefiedC.dryicevaporized.alcoholburnsWhensprayingantisepticpotionsindoors,itisoftenpossibletosmellspecialodors.A.themolecularmassisverysmallb.thereisAspacebetweenthemoleculesC.moleculesaremadeupofatomsThebiggestgasintheairis()A.oxygenb.nitrogenThefollowingstatementontheuseofcarboniswro
3、ng()UsecharcoalasArefrigeratordeodorantC.usecarbonpowderandleadtomakeleadpencil.GraphitecanbeusedasadrybatteryelectrodeThefollowingsubstancescontainoxygenmolecules()A.liquidoxygenb.waterc.chlorateDThepropertiesofthefollowinghydrogenarephysical()AcolorlessgasB.Canburnc.hasreductiveD.Canreactwithcoppe
4、roxideThefollowingarethechemicalformulasofthematerial,andthecorrectwritingis()A:magnesiumoxideMgO2b.aluminumchlorideAlClInthefollowingseveralfiresafetysigns,itissaidthatsmokingisprohibited.Inthefollowingnumberofparticles,theonethatdeterminesthetypeoftheelementis()A.thenumberofprotonsInthefollowingch
5、emicalreactions,thesubstitutionreactionis()Theparticlesthatholdthechemicalpropertiesofcarbondioxideare()A.carbonb.oxygenC.oxygenmoleculesOneofthecausesoftheminingaccidentisthatthereisasuddenexplosionofgasinthecoalseam.Themainingredientis()A.H2b.CH4c.CO2d.COIntheuseofthefollowingsubstances,thechemica
6、lnatureofthematterisnotrelatedto()A.COfuelb.CO2asAextinguishingagentC.CaCO3powderforwhitepaintd.alcoholforfuelOfthetwosubstances,H2SO3andH2SO4,thedifferenceis().A.theclassb.containstheelementc.sulfur.D.oxygenBeforeandafterthechemicalreaction,itiscertainthat()A.thenumberoftypesofatomsandthenumberofmo
7、leculesThefollowingstatementsaboutwaterarecorrect()A.waterconsistsofhydrogenandoxygen.WaterconsistsofhydrogenandoxygenatomsThewatermoleculeconsistsofahydrogenmoleculeandanoxygenatom.Waterconsistsofano
