GATE Life Science 2010 Examination Question Paper Part 2 Chemistry Compulsory Paper

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GATELifeSciences(XL)2010(GraduateAptitudeTestinEngineering:OriginalQuestionPaper)

Chemistry(H)CompulsoryPaper

Question1–5carriesonemarkeach:

1. Foraspontaneousprocess.Thetotalentropychange(∆Ssystem+∆Ssurroundings)is:a. Equaltozerob. Greaterthanzeroc. Lessthanzeroforendothermicprocessd. Lessthanzeroforexothermicprocess

2. Abatterydeliversasteadycurrentof1.25Afor90minutes.Thetotalcharge‘Q’(inCoulombunits)is:a. 6750b. 1012.5c. 112.5d. 12.5

3. Moleculethathasnolonepairofelectronsonthecentralatom(amongthechoices)is

a. XeF4b. PF3c. ClF3d. BF3

4. Theoxidationstateofnickelatominthecoordinationcompound[Ni(NH3)3Cl]Clis:a. ‐1b. 0c. +1d. +2

5. Thecompoundthatisaromatic,amongthechoicesis:

Questions6–15Carriestwomarkseach:

6. Considerthefollowingequilibriumreaction:www.easy

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CO(g)+Cl2(g)⥨COCl2(g)0.60atmofCOand1.10atmofCl2weremixedinaconstantvolumereactionvesselataparticulartemperature.Aftertheequilibriumwasestablished,0.10atmofCOCl2wasobserved.Theequilibriumconstantofthereactionis:

a. 0.02b. 0.15c. 0.20d. 6.60

7. Foraparticularreaction,theuseofacatalystreducestheactivationenergy(Ea)toonethirditsoriginalvalue.Theratioofrateconstant(Kcatalyzed/Kuncatalyzedis:

a. 1b. 1/3c. Exp(2Ea/3RT)d. Exp(Ea/3RT)

8. Among heptan‐1‐ol, heptan‐2‐ol, heptan‐3‐ol and heptan‐4‐ol, compounds thoseexhibitopticalactivityare:

a. Heptan‐2‐olandheptan‐3‐olb. Heptan‐2‐olandheptan‐4‐olc. Heptan‐3‐olandheptan‐4‐old. Heptan‐1‐olandheptan‐4‐ol

9. StructureofthecompoundYinthefollowingreactionsequenceis:

10. Theionizationenergyfollowstheorder:

a. O2+>O2>O2‐>O22‐b. O2>O2+>O22‐>O2‐c. O2‐>O22‐>O2+>O2d. O22‐>O2>O2‐>O2+

11. Reaction of Na2SO3 with 2 equivalents of HCL produces a gas X, Solution of X inwaterisacidicinnature,Xis:

a. O2b. Cl2c. SO2www.ea

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d. H2SCommondataforquestion12and13Theionizationconstantsofphosphorousacid(H3PO4)areKi1=3X10‐2;Ki2=1.7X10‐7

12. ForadilutesolutionofphosphorousacidinapH5buffer,thepredominantspeciesis:

a. H3PO3b. H2PO3‐c. HPO32‐d. PO33‐

13. Thestructureofphosphorousacidis:

LinkedAnswerQuestions:Considerthereactionsequence:

14. ThestructureofXintheabovereactionsequenceis:

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15. ThestructureofYintheabovereactionsequenceis:

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