雨课堂学堂云在线《Analytical Chemistry（西安交大 ）》单元测试考核答案

注：不含主观题第1题判断题(10分)Theaveragevalueofasetofdataisveryclosetothetruevalue,indicatingthatthemeasurementisveryaccurate.

第2题判断题(10分)Standarddeviationcanbetterreflecttheclosenessofanalysisresults.第3题判断题(10分)Allerrorscanbeeliminatedbythepropermethods.第4题单选题(10分)Whichofthefollowingstatementsabouterrorsiswrong?

AUncalibratedinstrumentwillcauseerrorsBImpurereagentswillcausemeasurementerrorsCSystemerrorscanbeeliminatedbyimprovingtestmethodsDRandomerrorscanbeeliminatedbyimprovingtestmethods第5题单选题(10分)Whichofthefollowingmethodscaneliminatesystemerrors?ACalibratemeasuringinstruments.BImprovemeasurementmethods.CChangethetesttemperature.D

Runacontrolledexperiment.第6题单选题(10分)Whichofthefollowingstatementsaboutsignificantfiguresisincorrect?ASignificantfigurereferstothenumberthatcanbeactuallymeasuredintheanalysiswork.BThenumberzerodoesnotaffectthenumberofsignificantfigures.CSignificantfiguresreflecttheaccuracyofthemeasurement.D

Thelastdigitofsignificantfiguresissuspicious.第7题单选题(10分)Whichofthecalculationaboutsignificantfiguresisincorrect?

A0.03050

has4significantdigits.B12.050

has5significantdigits.CpH=5.25has3

significantdigits.D7.2×10–5

has2

significantdigits.第8题单选题(10分)Whichofthefollowingstatementsaboutrandomerrorsisincorrect?ARandomerroriscausedbymanyunmeasurableerrorsthatcanaffectthemeasurementresult.BRandomerrorisalwaystoolargeortoosmall.CRandomerrorconformstonormaldistribution.D

Randomerrorsnotonlyaffecttheaccuracyofthemeasurementresults,butalsosignificantlyaffecttheprecisionofthemeasurementresults.第9题单选题(10分)Afterkeeping4significantfigures,whichofthefollowingnumbersexpressedinexponentialformiswrong?A

–0.024000shouldbeexpressedas–2.400×10–2.B374500shouldbeexpressedas

3.745×105.C0.000957830shouldbeexpressedas

9.578×10–4.D200.245700shouldbeexpressedas

2.003×102.第10题单选题(10分)Thefollowingstatementabouttherulesofnumberarithmeticiswrong?AWhenperformingaddition,usuallythenumberofdigitsofthedataisroundedreasonablyfirst,andthenthecalculationisperformed.BDuringsubtraction,thenumberofdigitsafterthedecimalpointreservedinthefinalcalculationresultshouldbebasedonthedatawiththeleastnumberofdigitsafterthedecimalpoint.CInthemultiplicationoperation,thenumberofdigitsreservedinthecalculationresultdependsonthenumberwiththeleastnumberofdigitsafterthedecimalpoint.D

Inthedivisionoperation,thenumberofdigitsreservedforthecalculationresultdependsonthenumberwiththeleastsignificantnumberofdigits.Quizforchapter3第1题判断题(10分)1.TheanalysisofpureNaOH(solid)canbeusedtopreparestandardsolutiondirectly.第2题判断题(10分)2.Accordingtotheacid-baseprotontheory,thesolventcanbothgiveprotonsandacceptprotons,whichareamphotericsubstances.第3题判断题(10分)3.IntheKMnO4

method,theKMnO4

solutioncanbefilledwithabasicburettefortitration.第4题单选题(10分)1.Intitrationanalysis,thesuddenchangeofindicatorcolorisgenerallyusedtodeterminethearrivalofstoichiometricpoint,andthetitrationisstoppedwhentheindicatorchangescolor.Thispointiscalled

().A

titrationanalysisB

titrationCstoichiometricpointD

endpointoftitration第5题单选题(10分)Whichofthefollowingstatementsisnottrue?()AThecontentofanysubstancecapableofredoxreactioncanbedeterminedbyadirectmethodBAcid-basetitrationisakindoftitrationanalysismethodbasedonprotontransferreactionCRapidreactionrateisoneoftheimportantconditionsfortitrationanalysisDChemicalreactionssuitablefordirecttitrationmustbequantitative第6题单选题(10分)Toprepare1000mL0.1mol/LHClsolution,thevolumeofconcentratedhydrochloricacid(12mol/L)shouldbe().A0.84mLB8.4mLC1.2mLD12mL第7题单选题(10分)

Ca2+

wasprecipitatedintoCaC2O4,thendissolvedinacid,andthentheH2C2O4

wastitratedwithKMnO4

standardsolution,soastodeterminethecontentofCa.

Thetitrationmethodusedbelongsto(

)AdirecttitrationBindirecttitrationmethodCprecipitationtitrationDredoxtitrationmethod第8题单选题(10分)ThemolarmassofareferencesubstanceAis500

g/mol,anditisusedtocalibratetheBsolutionof0.1

mol/L.Thecalibrationreactionissetas:A+2B==P,andtheweighingquantityofthereferencesubstanceis(

)A0.1~0.2

gB0.2-0.5

gC0.5~1.0

gD1.0~1.6

g第9题单选题(10分)

Errorscausedbyinconsistenciesbetweenthediscolorationpointofanindicatorandthestoichiometricpointarecalled()ArandomerrorBmethoderrorCterminalerrorDreagenterror第10题单选题(10分)ThecorrectwaytoprepareNaOHstandardsolutionis().Aindirectformulationmethod(calibrationmethod)BuseananalyticalbalancetoweighthereagentCdissolveasmallamountofdistilledwaterinavolumetricflaskD

usetheaboveBandCQuizforchapter4第1题判断题(10分)TheconjugatebaseofHCNisCN–.第2题判断题(10分)TheacidityofHAcisstrongerthanthatofH2CO3.第3题判断题(10分)Sodiumhydroxidesolidcanbeusedtopreparestandardsolutions.第4题单选题(10分)Whichofthefollowingstatementsaboutacidiswrong?

A

Thesubstancethatcanionizehydrogenionsinaqueoussolutionisacid.B

Thesubstancethatcanacceptprotonsisacid.CThesubstancethatcanacceptalonepairofelectronsisacid.DAcidmustcontainthehydrogenelement.第5题单选题(10分)Whichofthefollowingstatementsaboutacid-basereactionisincorrect?

A

Acid-basereactionisaprotontransferreaction.BSubstancesproducedbyacid-basereactionsarealsoacid-base.CAmphotericsubstancescanreactwithacidsorbases.DAnyacid-basereactioncanbeusedforacid-basetitration.第6题单选题(10分)ThepHof0.5mol/LNaCNis

?A11.45.B5.10.C10.90.D7.40.第7题单选题(10分)ThepHofmixedsolutionof300.0mL0.500mol/LH3PO4and400.0mL1.00mol/LNaOHis?

A12.35.B11.10.C11.90.D12.67.第8题单选题(10分)Whichofthefollowingstatementsabouttheconjugateacidsisincorrect?

AThe

conjugate

acidof

NH2OHis

NH3+OH.BThe

conjugate

acidof

H2Ois

H+.CThe

conjugate

acidof

(CH2)6N4

is

(CH2)6N4H+.DThe

conjugate

acidof

NH3

is

NH4+.第9题单选题(10分)Whichofthefollowingstatementsaboutbuffersolutionisincorrect?

ABuffersolutionscanonlybeconfiguredbyacidsandbases.BThecommonioneffectisthereasonwhythebuffersolutioniseffective.CAmphotericsubstancesandsuitableacidscanpreparebuffersolutions.DThebuffercapacityofthebuffersolutionisrelatedtotheacid-baseconcentration.第10题单选题(10分)TitrationofHClwithNaOHshoulduse

astheacid-baseindicator.AmethylorangeBphenolphthaleinCmethylredDalloftheaboveQuizforchapter5第1题判断题(10分)TheincreaseofacidityleadstoadecreaseinαY(H)

andanincreaseintheactualstabilityofEDTAcomplexes.第2题判断题(10分)IfthestabilityofthecomplexformedbytheindicatorandMisslightlylessthanthatofthecorrespondingEDTAcomplex,theendpointwillbedelayed,whichbelongstothefossilizationoftheindicator.第3题判断题(10分)Thecoordinationnumbersof[Cu(NH3)4]2+and[Cu(en)2]2+

areboth4.第4题单选题(10分)Whichofthefollowingstatementabout

αY(H)

iscorrectAαY(H)

decreasesaspHdecreasesBαY(H)

increasesaspHincreasesCAthighpH,

αY(H)

isapproximatelyequalto0DαY(H)

increaseswithincreasingsolutionacidity第5题单选题(10分)EDTAwithZn2+

complexesformedinconditionalstabilityconstantofthelgK

ɵ′Zn'recentequals

()A16.50B0.45C16.05D16.96第6题单选题(10分)IntheEDTAtitrationMg2+

system,whichofthefollowingsubstanceswillnotaffecttheaccuratetitration.

()AwaterBacidCconcentratedNaOHDtojointheweakalkalinesolutionpH=10.0第7题单选题(10分)InthecomplexometrictitrationwithEDTAtitrant,todeterminethecontentofAl3+,anexcessiveamountofEDTAstandardsolutionshouldbeaddedfirsttoproduceAl3+-EDTA,andthentheremainingEDTAstandardsolutionshouldbetitratedwithZn2+

standardsolution.Finally,thecontentofAl3+

shouldbecalculatedfromtheconsumedZn2+

andEDTA.

Thismethodbelongsto（）A

indirecttitrationmethodBdirecttitrationmethodCbacktitrationDdisplacementtitration第8题单选题(10分)Indicatorsusedincomplexometrictitrationbelongto

(

)AadsorptionindicatorBacid-baseindicatorCproprietaryindicatorsDmetalindicators第9题单选题(10分)WhentitratingthecompositionofCa2+

andMg2+

ionsinwaterwithEDTA,thecommonlyusedindicatoris

(

)Axylenol

orangeBchromiumblackT-indicatorCPAN(Cu-PAN)Dcalciumindicator第10题单选题(10分)Undernormalcircumstances,thecomplexationratioofEDTAtothemetalioncomplexis

()A1:1B1:2C1:3D2:1Quizforchapter6第1题判断题(10分)Theessenceofredoxreactionisthegainandlossofoxygenatoms.第2题判断题(10分)ThelargertheelectrodepotentialEvalue,thestrongertheoxidationstateoftheoxidizedsubstanceintheelectricpair.

第3题判断题(10分)Thegreatertheelectromotiveforce,thefastertheredoxreactionrate.第4题单选题(10分)TheoxidationnumbersofClinCl2OandSinS4O62–are

A

+1and+6,respectively.B+1and+4,respectively.C+1and+2.5,respectively.D–1and+6,respectively.第5题单选题(10分)Whichofthefollowingstatementsaboutprimarycelliswrong?

AInprinciple,anyspontaneousredoxreactioncanbedesignedasaprimarycell.BAprimarycellcanbeconstructedwithCuandCu2+

withoutotherredoxsubstances.CChangethepHvalueofthesolution,theelectromotiveforceoftheprimarycellwillchange.DThetemperaturerises,theelectromotiveforceoftheprimarycellincreases.第6题单选题(10分)TherightbatterysymbolofthereactionofCu(s)+2H+(0.01mol/L)=Cu2+(0.1mol/L)+H2(0.9×1.013×105Pa)is

A

(–)Cu(s)|Cu2+

(0.1mol/L)||H+

(0.01mol/L)|H2

(0.9×1.013×105

Pa)|Pt(s)(+).B(–)Pt(s)|H+

(0.01mol/L)|H2

(0.9×1.013×105

Pa)||Cu2+

(0.1mol/L)|Cu(s)(+).C(–)Cu(s)|Cu2+

(0.1mol/L)|H+

(0.01mol/L)||H2

(0.9×1.013×105

Pa)|Pt(s)(+).D

(–)Pt(s)|H2

(0.9×1.013×105

Pa)||H+

(0.01mol/L)|Cu2+

(0.1mol/L)|Cu(s)(+).第7题单选题(10分)Whichofthefollowingisnotanionelectrode?ACu2+/CuBSn4+/Sn2+CCr2O72–/Cr3+

DFe(CN)6]3–/[Fe(CN)6]4–第8题单选题(10分)TheelectromotiveforceoftheprimarycellofPt│U4+(0.200mol/L),UO22+(0.0150mol/L),H+(0.0300mol/L)║Fe2+(0.0100mol/L),Fe3+(0.025mol/L)│Pt

(Fe3++e==Fe2+

E

=0.769V;UO22++4H++2e==U4++2H2O

E

=0.334V)is?

A0.671V

B0.435V

C0.617V

D0.529V第9题单选题(10分)Underwhichofthefollowingconditions,theredoxreactioncanproceedspontaneously?AEMF

>0BEMF

<0C

K

>0D

K<0第10题单选题(10分)Whichofthefollowingstatementsaboutredoxtitrationiscorrect?

AAllredoxreactionscanbeusedfortitration.BThesizeoftheredoxtitrationpotentialjumphasnothingtodowiththeoxidationabilityoftheoxidant.CSomeredoxtitrationsdonotneedtoaddindicator.DIodometryisananalyticalmethodthatonlyusestheoxidizingpropertiesofI2

toperformtitration.Quizforchapter7第1题判断题(10分)TheundissolvedelectrolyteKspӨ

issmaller,itssolubilityinthewater

isalsosmall.第2题判断题(10分)TheconcentrationsofCl-，Br-andI-

canbedeterminedrespectivelyby

Mohrmethod.第3题判断题(10分)TheindicatorusedbyFayangjudicaturebelongstoadsorptionindicator.第4题单选题(10分)Whichofthefollowingprecipitationreaction

notbelongtothesilvermethod（

）AAg+

+Cl-=AgCl↓BAg+

+I-=AgI↓CAg+

+SCN-=AgSCN↓D2Ag+

+S2-=Ag2S↓第5题单选题(10分)InamixedsolutioncontainingCl-andCrO42-ionswithbothconcentrationsof0.010mol/L,AgNO3

solutionwasgraduallydropped(ignoringthechangeofvolume),andthefirstiontoprecipitatewas(

).[KspӨ(AgCl)=1.77×10-10,KspӨ(Ag2CrO4)=1.12×10-12]ACl-BCrO42-CSimultaneousprecipitationofCl-andCrO42-Dcouldnotbedetermined第6题单选题(10分)ThesolubilityofPbCl2

in0.10mol·L-1

NaClsolutionis()mol/L.[KspӨ(PbCl2)=1.7×10-5]A1.7×10-4B1.7×10-3C1.6×10-2D4.1×10-2第7题单选题(10分)AddAgNO3

solutionto0.10mol/L

NaClsolution,resultinginwhiteprecipitation.Thenaddammoniawatertothesolution,theprecipitationgraduallydissolves,andaddKIsolutiontothesystem,resultinginyellowprecipitation,whichindicates(

).A

KspӨ(AgCl)>KspӨ(AgI)B

KspӨ(AgCl)<KspӨ(AgI)CKspӨ(AgCl)=KspӨ(AgI)Dcannotbeexplained第8题单选题(10分)Tomakec(S2-)1×10-8mol/L,thepHvalueofH2Ssaturatedsolutionshouldbecontrolledas().[Ka1Ө(H2S)=8.9×10-8，Ka2Ө(H2S)=1.2×10-13]A7.02B13.89C5.99D7.50第9题单选题(10分)Intheprecipitationtitrationmethod,theindicatorusedbytheVolhard

methodis(

).AK2CrO4BNH4Fe(SO4)2CadsorptionindicatorDtojudge第10题单选题(10分)Whichofthefollowingstatementsistrue

()AMohrmethodcandetermine

theconcentrationof

Cl-、I-andAg+BTheionsthatcanbedeterminedbyVolhardmethodincludeCl-、Br-、I-、SCN-

andAg+CTheionsthatcanonlybedeterminedbyVolhard

methodareCl-、Br-、I-andSCN-DTheselectionofadsorptiveindicatorsintheprecipitationtitrationrequiresthattheadsorptivecapacityoftheprecipitatedcolloidalparticlestotheindicatorshouldbeslightlylargerthanthatoftheionstobemeasuredQuizforchapter8第1题判断题(1分)Thelighttransmittanceofthesolutionisproportionaltotheconcentrationofthesolution.第2题判断题(1分)Themolarextinctioncoefficientofasubstanceisrelatedtotherelativemolecularmassofthesubstance.第3题判断题(1分)Thewavelengthrangeofvisiblelightis400nmto700nm.第4题单选题(1分)Ifacuvettewithanopticalpathlengthof1cmisusedtomeasuretheabsorbanceofasolutionandtheresultis0.2,thenwhatwouldbetheabsorbanceobtainedbymeasuringthesolutionwithacuvettewithanopticalpathlengthof2cm?A0.4B0.3C0.1D0.5第5题单选题(1分)Whichofthefollowingwavelengthsbelongstotheultravioletrange?A350nmB555nmC0.8μmD200μm第6题单选题(1分)

Theabsorbanceofasolutionis0.6.Ifthesolutionconcentrationbecomeshalfoftheoriginalsolution,whatisthetransmittanceofthedilutedsolution?A10-0.6B100.6C10-0.3D100.3第7题单选题(1分)Intheprocessofspectrophotometricanalysis,inordertoreducetheinfluenceofmeasurementerrors,whatrangeshouldtheabsorbanceofthesolutionbecontrolled?A0.1-1.0B0.2-0.8C1.0-2.0D

2.0-8.0

第8题单选题(1分)Amongthefollowingoptions,whatisnotrelatedtotheabsorbanceofthecoloredcomplex?AWavelengthoftheincidentlightBCuvettethicknessCComplexconcentrationDComplexstability第9题单选题(1分)WhenapplyingLambert-Beerlawforquantitativeanalysis,whatkindoflightshouldbeusedasincidentlight?AWhitelightBSunraysCMonochromaticlightDUltravioletlight第10题单选题(1分)Regardingthespectrophotometer,whichofthefollowingstatementsisincorrect?AThelightsourceofthevisiblelightspectrophotometerisatungstenlampBUseprismorgratingasmonochromator;CMustusequartzcuvetteasabsorptioncell;DUsephotomultipliertubeorphotodiodeasdetectorQuizforChapter9第1题判断题(10分)Emissionspectravarywidelyandaredependentuponthechemicalstructureofthefluorophoreandthesolventinwhichitisdissolved.

第2题判断题(10分)Thefluorescencequantumyieldistheratioofthenumberofphotonsabsorbedtothenumberofphotonsemitted.

第3题判断题(10分)Emissionspectraaretypicallyindependentoftheexcitationwavelength.ThisisknownasKasha'srule.第4题单选题(10分)Whichofthefollowingfactorsgenerallydoesnotaffectthefluorescencespectrumofasolution?AExcitationwavelengthB

pHCSolventDConcentration第5题单选题(10分)Whichofthefollowingprocessesdoesnotaffectthenon-radiativerelaxationprocessofexcited-statemolecules?AVibrationalrelaxationBInternalconversionCQuenchDAggregation第6题单选题(10分)Whichofthefollowingmoleculesmayhavestrongestfluorescence?ApyridineBthiopheneCquinolineDfuran第7题单选题(10分)Inordertomaintainagoodlinearrelationshipbetweenthefluorescenceintensityofthesolutionandtheconcentrationofthesolution,youshould:AKeeptheabsorbanceofthesolutionlessthan0.05BKeepthelighttransmittanceofthesolutiongreaterthan0.5CUsemonochromaticlightasexcitationlightD

Usecuvetteswithlongeropticalpath第8题单选题(10分)Whichofthefollowingcomponentsisnotpartofthefluorescencespectrophotometer?ALightsourceBExcitationmonochromatorCEmissionmonochromatorDIonsource第9题单选题(10分)Whichofthefollowingapplicationsdoesnotbelongtotheapplicationrangeoffluorescencespectrophotometry?AQualitativeanalysisofinorganicionsB

QuantitativeanalysisoforganicmoleculesCGravimetricanalysisDBiochemicalanalysis第10题单选题(10分)Whichofthefollowingapplicationsdoesnotbelongtotheapplicationrangeoffluorescencespectrophotometry?A

HighsensitivityBHighselectivityC

NotsusceptibletointerferenceD

FlexibleQuizforchapter10第1题判断题(10分)O2

hasinfraredactivityandcanproduceinfraredabsorptionpeaks.第2题判断题(10分)Thecommonlyusedlightsourceininfraredspectrophotometerishollowcathodelamp.第3题判断题(10分)Themainadsorptionsofaldehydegroupareat1750~1700cm-1,2820cm-1,and2720cm-1.第4题单选题(10分)Whenusinginfraredanalysis,thesolventthatshouldbeselectedis（

）AmethanolBcarbontetrachlorideCchloroformDn-hexane第5题单选题(10分)Amongthefollowingcompounds,thehighestfrequencyofC-Ostretchingvibrationis（

）ARCOHBRCOFCRCOClDRCOR第6题单选题(10分)Intheinfraredabsorptionspectrum,theC-Cvibrationabsorptionpeakofaromatichydrocarbonappearsat（

）A2400～200cm-1B1650～1450cm-1C1900～1650cm-1D1000～650cm-1第7题单选题(10分)Itisknownthatacertaincompounddoesnothaveanyabsorptionpeakintheultravioletregion,buthasabroadandstrongabsorptionbandintheinfraredspectrumfrom3400to3200cm-1,thenthemostlikelycompoundis（

）AcarboxylicacidBalcoholCprimaryamineDether第8题单选题(10分)Inalcoholcompounds,duetothestrengtheningoftheintermolecularhydrogenbond,theO-Hstretchingvibrationfrequency

（）

withtheincreaseofthesolutionconcentration.Amovestowardslowwavenumber

BmovestowardshighwavenumberCNochangeDAandBarebothpossible第9题单选题(10分)Intheinfraredspectrum,theabsorptionpeakinthehighfrequencyregionnear3000cm-1

ismainlycausedby（

）

AstretchingvibrationofC-C,C-OBstretchingvibrationofC-H,O-H,N-HCstretchingvibrationofC=C,C=ODstretchingvibrationofC≡C,C≡N第10题单选题(10分)Intheinfraredspectrum,therearetwoobviousabsorptionbandsintherangeof3500～3100cm-1,thenthemostlikelycompoundis（）A(C6H5)CONH(C6H5)B(C6H5)COOHC(C6H5)CO(C6H5)D

(C6H5)CONH2Quizforchapter11第1题判断题(10分)Thehydrogenbondhasagreatinfluenceontheprotonchemicalshiftofactivehydrogen.第2题判断题(10分)Inthe

1HNMRspectrumofCH3CH2OCH(CH3)2,theratioofareaofvariousprotonsignalsis9:2:1.第3题判断题(10分)第4题单选题(10分)IntheNMRspectrumofCH3CH2CH3,theprotonsignalofCH2

issplitinto(

)bytheprotoncouplingofCH3.AquartetBquintetCsixpeaksDsevenpeaks第5题单选题(10分)Howmanyspinorientationsdoesanatomicnucleuswithspinquantumnumber

I

=1/2haveintheexternalmagneticfield?

()A1B2C4D0第6题单选题(10分)FromtheNMRspectraofethyleneandacetylene,theprotonchemicalshiftvaluesare5.8and2.8,respectively.Thereasonforthelargechemicalshiftvalueofprotonpeaksoftheethyleneis().AinducedeffectBanisotropiceffectCspin-spincouplingDconjugationeffect第7题单选题(10分)Whichofthefollowingnucleusexhibitzeronuclearmagneticmomentsanddonotproducenuclearmagneticresonancesignals?

(

)A2H,

14NB19F,

12CC1H,

13CD16O,

12C第8题单选题(10分)Whichofthefollowingcompoundsshowsthesmallestchemicalshiftsofprotons?

()ACH3FBCH4CCH3ClDCH3Br第9题单选题(10分)TheNMRspectrumofClCH2-CH2Clmoleculeisexpectedafterspin-spinsplitting

(

).Ahas4protonpeaksBhas2protonpeaksCdoesnotexhibitsplittingDhas5protonpeaks第10题单选题(10分)1HNMRspectrumofacompound(C10H14)showstwosetsofsinglepeakat

δ

=7.2(a)and

δ

=1.3(b)respectively.Theratioofpeakareaisa:b=5:9.Thestructureofthecompoundis(

).A(C6H5)CH2CH(CH3)2B(C6H5)CH(CH3)CH2CH3C(C6H5)C(CH3)3D(C6H5)CH2CH2CH3Quizforchapter12第1题判断题(10分)ForcompoundscomposedofC,H,O,andN,themassnumbersofthemolecularionpeaksofthemassspectrumareevennumbers.第2题判断题(10分)Thesquareoftheion'sradiusofmotioninthemassspectrometerisproportionaltothestrengthofthemagneticfield.第3题判断题(10分)Thepeakwiththelargestmass-to-chargeratiointhemassspectrummustbethemolecularionpeak.第4题单选题(10分)Amongthefollowingmethods,whichcandeterminethemolecularmass?AUltravioletspectrumBInfraredspectrumCLuminescenceSpectrometryDMassspectrometry第5题单选题(10分)The

massspectrometer

doesnotinclude(

).AThe

quadrupolemassspectrometerBThe

time-of-flightmassspectrometerCDoublefocusmassspectrometerDPowerqualityanalyzer第6题单选题(10分)The

degreeofunsaturation

ofbenzeneis().A3B4C5D6第7题单选题(10分)Them/zofthemolecularionpeakofacompoundis87.()maybetheformulaofthecompound.AC7H7O2BC5H10OCC4H9NODC6H15第8题单选题(10分)InthemassspectrumofthecompoundC2H5Br,therelativeintensityratiooftheMandM+2peaksisabout(

).A1:1B2:1C3:1D4:1第9题单选题(10分)Amongthefollowingcompounds,whichhastheweakestmolecularionpeak?(

).AaromaticringBconjugatedalkenesCesterDalicycliccompound第10题单选题(10分)Thecorrectdescriptionaboutthemolecularionpeakis(

).AThemass-to-chargeratioofthemolecularionpeakisequaltotherelativemolecularmassofthecompoundBThepeakwiththelargestmassisthemolecularionpeakCThesecondhighestmasspeakisthemolecularionpeakDThemostintensepeakisthemolecularionpeakQuizforchapter13第1题判断题(10分)Theradiationsourcesusedinatomicabsorptionspectrometry(AAS)areusuallyelement-specific.第2题判断题(10分)Intheatomicabsorptionspectrophotometer,thecurrentlycommonlyusedlightsourceisatungstenlamp.第3题判断题(10分)Intheatomicabsorptionanalysismet