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  • 7/7/2015 QuestionRevision

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    Question1.

    Inthedecompositionof of 0.1mole and4.0gMgOareobtained.Hence,percentagepurityofMgCO3is:

    [A] 50%[B] 60%[C] 40%[D] 84%

    Question2.Whichofthefollowingareisoelectronicwith ?

    I. II. III. IV.

    Thecorrectchoiceis:[A] I,II[B] I,II,IV[C] II,IV[D] I,II,III,IV

    Question3.

    Aland reacttogethertoform accordingtofollowingequations:

    Howmanymolesof areformedstartingwith4.0molesof (whichis50%pure)onreactionwithexcessofAl?

    [A] 2mol[B] 4mol[C] 6mol[D] 8mol

    Question4.0.5moleof ismixedwith0.2moleof .Themaximumnumberofmolesofbariumphosphateformedinthisreactionis:[A] 0.1[B] 0.2[C] 0.3[D] 0.5

    Question5.

    Inthereaction: themassofcarbonthatwillbeusedupinforming11.2LofCOatNTPis:

    [A] 0.6g[B] 6g[C] 12g[D] 24g

    Question6.

    Forthereaction: thevolumeofcarbonmonoxiderequiredatSTPtoreduceonemoleofferric

    oxideis:

    [A]

    [B]

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    [C]

    [D]

    Question7.TheOxidationstateofPin arerespectively:

    [A][B][C][D]

    Question8.Inwhichofthefollowingreaction,theoxidationnumberofCrhasbeenchanged?

    [A]

    [B]

    [C]

    [D]

    Question9.

    0.05moleofasampleof isneutralisedbyacertainsampleof This samplecanbecompletelyneutralisedby:[A] 0.05molofNaOH[B] 0.10molofNaOH[C] 0.05molof[D] Both(B)and(C)

    Question10.

    Inthegivenredoxreaction: .1moleof willoxidise

    [A] 1moleof

    [B] 3molesof

    [C] 4molesof

    [D] 6molesof

    Question11.Equivalentweightsof inacidicmedium,concentratedalkalinemediumandthedilutebasicmediumrespectivelyare:

    .Thereducedproductscanbe:

    [A]

    [B]

    [C]

    [D]

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    Question12.

    Foratitrationof ofa0.1M of solutionwasrequired.Theoxidationstateofceriuminthereductionproductis:[A] +1[B] +2[C] +3[D] 0

    Question13.

    Inthegivenredoxreaction:

    Thenumberofmolesof reducedby1molof is:

    [A] 1[B] 2[C] 3[D] 4

    Question14.Themolarityof ioninamixturecontaining100mLof0.1M and200mLof0.1H3PO3is:

    [A] 0.1M[B] 0.2M[C] 0.267M[D] 0.133M

    Question15.

    3molesofamixtureof and required100mLof2M solutioninacidicmedium.Hence,mole

    fractionof inthemixtureis:

    [A]

    [B]

    [C]

    [D]

    Question16.Molesof (potassiumacidoxalate)requiredtoreduce100mLof0.02M inacidicmedium(to )is:

    [A] 0.002[B] 0.005[C] 0.001[D] 0.007

    Question17.Ofthefollowingelements,whichelementhasthehighestfirstIonizationenergy?[A] N[B] Ne[C] He[D] H

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    Question18.Fluorineismoreelectronegativethannitrogen.Thebestexplanationforthisfactis:[A] ThevalenceelectronsinFareontheaverage,alittleclosertothenucleusthaninN[B] ThechargeonaFnucleusis+9,whilethatonNnucleusis+7[C] ThevalenceelectronsinFandNareindifferentshellsandthustheirenergiesaregreatlydifferent[D] Electronegativityincreasesfromlefttorightineachoftheperiod

    Question19.Electronaffinityispositivewhen:

    [A] isformedfromO

    [B] isformedfrom

    [C] isformedfromO[D] Electronaffinityisalwaysanegativevalue

    Question20.Whichofthefollowingelectronictransitionsrequiredthatthegreatestquantityofenergybeabsorbedbyahydrogenatom?[A] n=1ton=2[B] n=2ton=4[C] n=3ton=6[D] n=1ton=

    Question21.

    Giventhissetofquantumnumbersforamultielectronatom2,0,0, and2,0,0, .Whatisthenexthigherallowedsetofnand

    quantumnumbersforthisatominitsgroundstate?

    [A] n=2, =0[B] n=2, =1[C] n=3, =0[D] n=3, =1

    Question22.Whichisapossiblesetofquantumnumbersforavalenceelectroningroundstateatomofphosphorus(Z=15)?

    [A]

    [B]

    [C]

    [D]

    Question23.Theorbitalangularmomentumofanelectronin2sorbitalis:

    [A]

    [B] zero

    [C]

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    [D]

    Question24.Bohrmodalcanexplainthespectrumof:[A] Thehydrogenatomonly[B] Anatomorionhavingoneelectrononly[C] Thehydrogenmoleculeonly[D] Thesodiumatomonly

    Question25.IftheradiusoffirstBohrorbitisx,thendeBrogliewavelengthofelectronin3rdorbitseriesof is:

    [A][B][C][D]

    Question26.Thenumberofnodalplanesina orbitalis:

    [A] One[B] Two[C] Three[D] Zero

    Question27.

    Whenacertainmetal(thresholdfrequency: )wasirradiatedwithalightoffrequency Hz,thephoto

    electronemittedhasntimesthekineticenergyasdidphotoelectronsemittedwhenthesamemetalwasirradiatedwithlightoffrequencyHz.Whatisthevalueofn?

    [A] 3[B] 1/3[C] 1[D] 9

    Question28.

    Thehybridizationof carbonatomis:

    [A]

    [B]

    [C]

    [D]

    Question29.Theenthalpychangeforareactiondoesnotdependonthe:[A] Physicalstateofreactantsandproducts[B] Useofdifferentreactantsforthesameproduct[C] Natureofintermediatereactionsteps[D] Differenceininitialorfinaltemperatureofinvolvedsubstances

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    Question30.

    Theelementwiththeelectronicconfigurationas representa:

    [A] Metal[B] Nonmetal[C] Metalloid[D] Transitionelement

    Question31.Thevelocitytimegraphofabodyisshowninthefigure.TheratioofmagnitudeofaverageaccelerationduringtheintervalsOAandABis:

    [A] 1[B] 1/2[C] 1/3[D] 3

    Question32.Thevelocitytimegraphofabodyisshowninthefigure.Itindicatesthat:

    [A] AtBforceiszero[B] AtBthereisaforcebuttowardsmotion[C] AtBthereisaforcewhichopposesmotion[D] At'B'thereisaforcewhichopposesmotion

    Question33.ThreelightstringsareconnectedatthepointP.AweightWissuspendedfromoneofthestring.EndAofthestringAPandendBofthestringPBarefixedasshown.Inequilibrium,PBishorizontalandPAmakesanangleof withthehorizontal.IfthetensioninPBis30N,thenthetensioninPAandweightWarerespectively,givenby:

    [A] 60N30N[B]

    [C] 60N

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    [D]

    Question34.

    Twoblocksofmasses0.2kgand0.5kg,whichareplaced22mapartonaroughhorizontalsurface areacteduponbytwoforcesofmagnitude3Neachasshowninfigureattimet=0.Then,thetimetatwhichtheycollidewitheachotheris:

    [A] 1s[B] 2s[C]

    [D]

    Question35.

    Acoinisplacedattheedgeofahorizontaldiscrotatingaboutaverticalaxisthroughitsaxiswithauniformangularspeed

    Theradiusofthediscis50cm.Findtheminimumcoefficientoffrictionbetweendiscandthecoinsothatthecoindoesnotslip

    [A] 0.1[B] 0.2[C] 0.3[D] 0.4

    Question36.Astoneisdroppedfromthe25thstoreyofamultistoriedbuildinganditreachesthegroundin5s.Inthefirstsecond,itpassesthrough

    howmanystoreyofthebuilding?

    [A] 1[B] 2[C] 3[D] 4

    Question37.

    Formotionofanobjectalongthexaxis,thevelocityvdependsonthedisplacementxas thenwhatistheaccelerationatx=2m.

    [A]

    [B]

    [C]

    [D]

    Question38.

    Twocarsaremovinginsamedirectionwithspeedof Theyareseparatedbyadistanceof5km.Whatisthespeedofa

    carmovinginoppositedirectionifitmeetsthetwocarsatanintervalof4min?

    [A]

    [B]

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    [C]

    [D]

    Question39.Iftwoballsofsamedensitybutdifferentmassesaredroppedfromaheightof100m,then(neglectairresistance):[A] BothwillcometogetheronEarth[B] LighterwillcomeearlierontheEarth[C] HeavierwillcomeearlieronEarth[D] Noneofthese

    Question40.Themagnitudeofdisplacementisequaltothedistancecoveredinagivenintervaloftimeiftheparticle:[A] Moveswithconstantaccelerationalonganypath[B] Moveswithconstantspeed[C] Movesinsamedirectionwithconstantvelocityorwithvariablevelocity[D] Moveswithconstantvelocity

    Question41.Astonethrownupwardswithspeeduattainsmaximumheighth.Anotherstonethrownupwardsfromthesamepointwithspeed2uattainsmaximumheightH.WhatistherelationbetweenhandH?[A] 2h=H[B] 3h=H[C] 4h=H[D] 5h=H

    Question42.

    Avectorperpendicularto is:

    [A]

    [B]

    [C]

    [D]

    Question43.

    Given and Whichofthefollowingisincorrect?

    [A]

    [B]

    [C]

    [D] and areparallel

    Question44.AflagismountedonacarmovingdueNorthwithvelocityof20km/hr.Strongwindsareblowingdueeastwithvelocityof20km/hr.Theflagwillpointindirection[A] East[B] NorthEast[C] SouthEast[D] SouthWest

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    Question45.

    Twovectors havemagnitudesof4and6unitsandtheanglebetweenthemis .Whatisthemagnitudeof ?

    [A]

    [B]

    [C][D] Noneofthese

    Question46.Astoneisdroppedfromacertainheightwhichcanreachthegroundin5sec.Itisstoppedafterthreesecondsofitsfallandthenisagainreleased.Thetotaltimetakenbythestonetoreachthegroundwillbe:[A] 6s[B] 6.5s[C] 7s[D] 7.5s

    Question47.

    Velocityofaparticle(v)varieswiththepositionoftheparticle(x)as: ,ac