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DAT PRACTICE QUESTION WITH THE CORRECT ANSWERS UPDATED AND 100% VERIFIED
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DAT PRACTICE QUESTION WITH THE CORRECT ANSWERS UPDATED AND 100% VERIFIED
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DAT PRACTICE QUESTION WITHTHE CORRECT ANSWERS
UPDATED AND 100% VERIFIED
ABfather'sBageBisBtwiceBtheBsumBofBtheBagesBofBhisBfourBsons.BInB30Byears,BtheBtotalBofBt
heBsons'BagesBwillBbeBtwiceBtheBageBofBtheirBfather.BHowBoldBisBtheBfatherBnow?
a)B24
b)B48
c)B32
d)B40
e)B36B-BcorrectBanswer-d)B40
IfBtheBsumBofBtheBfourBson'sBagesBisBxBatBpresent,BtheBfather'sBageBisB2x.BInB30Byears,Bth
eBtotalBofBtheBson'sBagesBwillBbeBx+4×30=x+120,BwhereasBtheBfather'sBageBwillBbeB2x+3
0.BTherefore,Bx+120=2(2x+30),BwhichByieldsBx=20,BandBhence,BtheBfather'sBageBatBpre
sentBisB2x=40.
IfBtheBtemperatureBdropsBbyB18oBFahrenheitBinBaBgivenBday,BhowBmuchBdidBitBdropBinBd
egreesBCelsius?
a)B-14
b)B10
c)B32.4
d)B-7.78
e)B25.2B-BcorrectBanswer-b)B10
TheBratioBofB"changeBinBdegreesBFahrenheit"BtoB"changeBinBdegreesBCelsius"BisBsimply
B9BtoB5,BandBtherefore,B(18×5)B/
,B9B=B10.BIfByouBwereBconvertingBaBtemperatureBofB18oBFahrenheitBtoBdegreesBCelsius,Bt
henBitBwouldBbeB((18-32)B×B5)B/B9B=B-7.78oBCelsius.
WhichBofBtheBfollowingBwillBnotBdissolveBinBwater?
BA.BSalt,BNaCl
BB.BEthanol,BCH3CH2OH
BC.BBenzene,BC6H6
BD.BHydrogenBchloride,BHCl
BE.BAceticBacid,BCH3COOHB-BcorrectBanswer-C.BBenzene,BC6H6.
TheBlawBofBsolubilityBisBthatB"LikeBdissolvesBLike",BthatBisBnon-
polarBsolventsBdissolveBnon-
polarBsubstancesBandBpolarBsolventsBdissolveBpolarBandBmostBionicBsubstances.
WaterBisBaBpolarBsolventBthus:
Salt,BNaClB-BionicBandBveryBsolubleBinBwater,BseaBwater.
Ethanol,BCH3CH2OHB-BpolarBmolecularB(-OH)BwillBdissolveBinBwater,Bbeer/wine/spirits.
Benzene,BC6H6B-Bnon-polarBmolecularBwillBnotBdissolveBinBpolarBwater.
HydrogenBchloride,BHClB-BpolarBmolecularBwillBdissolveBinBwater,BhydrochloricBacid.
AceticBacid,BCH3COOHB-BpolarBmolecularB(-COOH)BwillBdissolveBinBwater,Bvinegar.
WhichBofBtheBfollowingBstructuresBofBtheBskeletalBsystemBisBinnervated?
BA.BHair
BB.BNails
BC.BCartilage
BD.BOsteoclasts
BE.BHaversianBcanalsB-BcorrectBanswer-E.BHaversianBcanals
InnervatedBrefersBtoBtheBstructureBhavingBnervesBandBbloodBvesselsBthatBrunBthroughBit
.BNailsBandBhairBareBconsiderBdead/
dyingBcellsBandBwouldBnotBhaveBbloodBvesselsBthatBrunBthroughBtheBexteriorBnailBstruct
ure.BCartilageBisBnotBinnervatedBwhichBattributesBtoBtheBlongBhealingBtimeBofBsprainedBj
oints.BOsteoclastsBareBcellsBthatBhelpBtoBbreakBdownBboneBcellsBandBtheseBcellsBthems
elvesBdoBnotBhaveBbloodBvesselsBorBnerves.BTheBHaversianBcanalsBareBaBnetworkBofBo
peningBinBtheBboneBthatBallowBforBnervesBandBbloodBvesselsBtoBweaveBinBandBoutBofBthe
Bbone.
TwoBtrainsBareBapproachingBeachBotherBfromBoppositeBdirectionsBwithBtheBspeedsB10B
milesBperBhourBandB20BmilesBperBhour,BandBheadingBforBaBcollision.BIfBtheyBareBaBquarte
rBmileBapart,BhowBlongBwillBitBtakeBforBthemBtoBcollide?
BA.B45Bseconds
BB.B20Bseconds
BC.B30Bseconds
BD.B40Bseconds
BE.B1Bminute B-BcorrectBanswer-C.B30Bseconds
,TheBspeedBatBwhichBtheBtwoBtrainsBareBclosingBtheBgapBbetweenBthemBisB10B+B20B=B30B
mph.BAtBtheBisBspeed,BitBwillBtakeB(0.25/30)B×B3600B=B30BsecondsBtoBcloseBaBgapBofB0.2
5Bmiles.
WhichBofBtheBfollowingBstatementsBisBcorrect?
BA.BHighBmolecularBdipoleBmomentsBareBcharacteristicBofBnonpolarBmolecules
BB.BPolarBsolutesBtendBtoBbeBmoreBsolubleBinBnonpolarBsolvents
BC.BTheBpolarity BofBaBmoleculeBisBdependent BonBitsB3-DBstructure
BD.BAllBpolarBmoleculesBareBcapableBofBhydrogenBbonding
BE.BLondonBdispersionBinteractionsBareBusuallyBstrongerBthanBdipole-
dipoleBinteractionsB-BcorrectBanswer-
C.BTheBpolarityBofBaBmoleculeBisBdependentBonBitsB3-DBstructure
ABmolecule'sBdipoleBisBanBelectricBdipoleBwithBanBinherentBelectricBfieldB(notBbeBconfuse
dBwithBaBmagneticBdipoleBwhichBgeneratesBaBmagneticBfield).BMoleculesBcanBhaveBdipo
leBmomentsBdueBtoBnon-
uniformBdistributionsBofBpositiveBandBnegativeBchargesBonBtheBvariousBatoms.BForBdiat
omicBmoleculesBthereBisBonlyBoneB(singleBorBmultiple)BbondBsoBtheBbondBdipoleBmomen
tBisBtheBmolecularBdipoleBmoment,BwithBtypicalBvaluesBinBtheBrangeBofB0BtoB11BD.BForBpo
lyatomicBmoleculesBthereBisBmoreBthanBoneBbond,BandBtheBtotalBmolecularBdipoleBmom
entBmayBbeBapproximatedBasBtheBvectorBsumBofBallBindividualBbondBdipoleBmoments.
IfBanBunknownBcompoundBisBfoundBtoBhaveBanBempiricalBformulaBofBCH4,BwhichBofBtheB
followingBisBtheBmolecularBformulaBifBtheBmolarBmassBwasBdeterminedBtoBbeB128Bg/
mol?
A.BCH4
B.BCH12
C.BC8H12
D.BC8H32
E.BC12H16B-BcorrectBanswer-D.BC8H32
ToBdetermineBtheBmolecularBformulaBusingBanBempiricalBformula,BtheBratioBofBtheBmole
cularBmassBtoBtheBempiricalBmassBmustBbeBcalculated.BDividingBtheBmolecularBmassBof
B128BgramsBbyBtheBempiricalBmassBofB~16BgramsB(CB=B12gB+BHB=B1g,BbutBthereBareB4Bh
ydrogensBinBtheBcompound)BgivesByouBapproximatelyB8.BThisBindicatesBthatBtheBempiri
calBsubscriptsBmustBbeBmultipliedBbyB8BtoBresultBinBtheBmolecularBformulaBofBtheBunkno
wnBcompound,BC8H32.
WhichBofBtheBfollowingBmoleculesBisBamphipathic?
BA.Bwater
BB.Bglucose
BC.Bsteroids
BD.Btriglycerides
BE.BphospholipidsB-BcorrectBanswer-E.Bphospholipids
AnBamphipathicBmoleculeBhasBbothBaBhydrophilicB("waterBloving")BandBaBhydrophobicB(
"waterBfearing")Bregion.BWaterBisBhydrophilic,BwhereasBaBtriglycerideB(orBlipid)BisBhydro
, phobic.BGlucoseBisBalsoBhydrophilic.BSteroidsBareBderivedBfromBlipidsBandBalsoBwouldBb
eBhydrophobic.BABphospholipidBisBmadeBofBaBphosphateBgroupB(hydrophilic)BandBtwoBfa
ttyBacidBchainsB(hydrophobic)BandBisBamphipathic.
FromBaBgroupBofB5BmenBandB7Bwomen,BinBhowBmanyBdifferentBwaysBcanBaBteamBofB2Bm
enBandB3BwomenBbeBformed?
BA.B95040
BB.B792
BC.B350
BD.B4200
BE.B18B-BcorrectBanswer-C.B350
2BmenBcanBbeBpickedBfromBaBgroupBofB5BinB(5|
2)B=B10BdifferentBways,BandB3BwomenBcanBbeBpickedBfromBaBgroupBofB7BinB(7|
3)B=B35BdifferentBways.BTherefore,BtheBtotalBnumberBofBwaysBaBteamBcanBbeBformedBisB
10B×B35B=B350.
ExtendedBexplanation:BIfByouBgotBD.B4200,ByouBinterpretedBthisBproblemBasBaBpermutat
ion,BnotBasBaBcombination.BWeBdoBnotBcareBwhatBorderBtheBmenBareBpickedBinBorBwhatB
orderBtheBwomenBareBpickedBin,BallBweBcareBisBthatBthereBisBaBteamBofB2BmenBandBaBtea
mBofB3Bwomen.
PermutationBequation:
P(n,r)B=Bn!B/B(n-r)!
CombinationBequation:
C(n,r)B=Bn!B/Br!(n-r)!
WhereBnB=BtotalBnumberBofBtheBgroupBandBrB=BtheBnumberBofBpeopleBweBwant.BHence,
nB=B5Bmen
rB=B2Bmen
WeBhaveB10BtotalBpossibleBcombinationsBusingBtheBaboveBformula.
TheBsameBgoesBforBwomen.
nB=B7Bwomen
rB=B3Bwomen
WeBhaveB35BtotalBpossibleBcombinationsBusingBtheBaboveBformula.
MultipliedBtogether,BweBhaveB350BpossibleBcombinations.
HowBmanyBdegreesBofBunsaturationBareBpresentBinBtheBanxiolyticBdrugBValiumB(diazep
am),BmolecularBformulaBC16H13ClN2O?
BA.B8
BB.B9
BC.B10
BD.B11
BE.B12B-BcorrectBanswer-D.B11
DegreeBofBUnsaturationB(orBindexBofBhydrogenBdeficiency,BIHD),BorBringsBplusBpiBbonds
,BletsByouBdetermineBtheBnumberBofBrings,BdoubleBbondsBandBtripleBbondsBpresentBinBth
eBcompoundBifBtheBmolecularBformulBisBknown.BItBdoesBnotBgiveBtheBexactBnumberBofBri
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