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Model Question Papers

ChemistryTime : 2½ hours

Written Exam Marks : 70 Marks

Based on Scheme of Examination as per G.O. (2D). No. 50 dated : 09-08-2017

+

NEETModel Exam Question Papers

Type of Questions MarksNo. of Questions

to be answeredTotal

Marks1 Mark questions 1 15 15Questions for Very Short Answers : (Total 9 questions.Out of which 1 question is compulsory).

2 6 12

Questions for Short Answers : (Total 9 questions.Out of which 1 question is compulsory).

3 6 18

Questions for Long Answers : (With sub-sections).

5 5 25

Total 70

Higher Secondary - First year

Question Paper Pattern (For Subjects with Practical Exam)

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11thSTD.

Time : 2½ Hours Chemistry Marks : 70

Model Question PaPer

Part - II. Answer all the questions. [15 × 1 = 15] Choose the most appropriate answer 1. The number of atoms present in 0.5 gram atoms of Nitrogen is same as the atoms in

(a) 12g of C (b) 8g of the Oxygen (c) 32g of S (d) 24g of Magnesium.2. Frothflotationprocessissuitableforconcentrating..............ores

(a) Sulphide (b) Oxide (c) Carbonate (d) Halide3. Considerthefollowingstatements

(1) Transitionmetalshavethens1–2 (n–1)d1–10electronicconfiguration(2) Cl–ionisbiggerthanClatom(3) SecondionizationpotentialislesserthanthefirstionizationpotentialWhichofthefollowingstatement(s)givenaboveis/arenotcorrect.(a) 1,2and3 (b) only2 (c) only3 (d) 2and3

4. MatchthelistIwithlistIIandselectthecorrectanswerusingthecodegivenbelowthelists.

ListI ListII Code :

A B C Da. 1 2 3 4b. 4 3 2 1c. 2 3 4 1d. 1 3 4 2

A Na + O2 1. Sodium DeuteroxideB Na + H2O 2. Sodium PeroxideC Na + NH3 3. Sodium HydroxideD Na +D20 4. Sodamide

5. Thebasicoxideamongthefollowing(a) Bi2O3 (b) SnO2 (c) HNO3 (d) SO3

6. TheWeissindicesofaplaneare 12

12

12

, , .Itsmillerindiceswillbe................

(a) (0,1,1) (b) (1,0,1) (c) (2,2,2) (d) 12

12

12

, ,

7. Excludedvolumepermoleculeis(a) 4Vm (b) 2Vm (c)

Vm2

(d) 4nVm

8. Thecompoundwhichcontainsbothionicandcovalentis(a) CH4 (b) H2 (c) KCN (d) KCl

9. Workdoneinthereversibleexpansionis..............(a) Minimum (b) Maximum(c) Zero (d) Notpredictable

10. TheequilibriumconstantforthereactionCO2(g) + C (s) ↔ 2CO(g).WhenthepartialpressureofCO2andCOare0.04atmand0.2atmrespectivelyis(a) 1.9 atm (b) 1 atm (c) 2 atm (d) 0.04 atm

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Sura’S Model QueStion PaPerS +1 Std - Chemistry 3

11. IUPACnameofCH2 = CH – CH2Clis(a) Allylchloride (b) 3-chloro1-propene(c) 1-chloro2-propene (d) VinylChloride

12. InthedetectionofSulphurusingLassaigne’stestthepurplecolourisdevelopeddueto(a) Na4[Fe(CNS)5NO] (b) Na4[Fe(CN)5NOS] (c) Fe(CNS)3 (d) Na(CNS)

13. Diels–Alderreactionisareactionbetween(a) dieneanddieneophile (b) electrophileandnucleophile(c) Oxidantandreductant (d) freeradicals

14. The ortho and para directing groups area) activatinggroups b) deactivatinggroupc) both (a) & (b) d) No effect

15. Statement I:Arylhalidesdonot readilyundergoNucleophilic substitution reactionsunderordinary conditions.

StatementII:InArylhalidesC-Xbondisshortandstrong.(a) BoththestatementsareindividuallytruebutstatementsIIisnotthecorrectexplanationof

statementI.(b) Both thestatementsare individually trueandstatementII is thecorrectexplanationof

statementI.(c) StatementIistruebutstatementIIisfalse.(d) StatementIisfalse,butstatementIIistrue.

Part - IIII. Answer Any Six Questions in which Question No.21is compulsory [6 × 2 = 12]16. Calculatethenormalityofsolutioncontaining6.3gofhydratedoxalicacidin500mlofsolution.17. Writetheelectronicconfigurationofchromiumandcopper18. Howdoesozonereactwiththefollowing(a)PbS(b)BaO2

19. WritethesignificanceofVanderwaal’sconstant‘a’and‘b’20. Calculatethevapourpressureofthesolution.Whenthemolefractionofthesoluteis0.5,the

vapourpressureofthepuresolventis0.6atm.21. SubstantiatewithreasonNH3isaNucleophileandAlCl3isaelectrophile.22. 0.12gofanorganiccompoundgaveoncombustiongave0.11gofCO2.Calculatethepercentage

of C in the organic compound.23. WritenotesonFridelCraft’salkylation.24. Predict the structure of SF4 using VSEPR theory ?

Part - III

III. Answer Any Six Questions in which Question No.30 is compulsory [6 × 3 = 18]25. WriteanytwomethodsofpreparationofTritium.26. HowisPlasterofParisprepared?Writeany2ofitsuses.27. Explainthecharacteristicsofs–Blockelements.28. DefineIsotropyandAnisotropy.29. TwomolesofH2andthreemolesofI2 are taken in 2dm3vesselandheated.Iftheequilibrium

mixturecontains0.6molesofHl,calculatekpandkcforthereaction.

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4 Sura’S Model QueStion PaPerS +1 Std - Chemistry

30. (i) DefindHalflifeperiod (ii)Thetimeforhalflifeoffirstorderreactionis1hr.Whatistimetakenfor87.5%completion

of the reaction.31. UsingHuckel’sAromaticruleprovenaphthaleneisaaromaticcompound.32. Writethetwomethodsofpreparationoffreeradicals33. CompletethefollowingReaction a) CH O MoO

4 23+ → b) 3CH ≡ C – CH3

Redhot tubeUnder pressure →

c) C6H5OH Dry distillationZinc →

Part - IVIV. Answer All the Questions [5 × 5 = 25] 34. (i) CalculatetheEquivalentmassofSulphuricAcid (2) (ii) Howwillyoudetermineequivalentmassofanelementbyoxidemethod. (3)

(or) (i) DescribetheprincipleprocessinvolvedinthepurificationofthemetalbythisZone

Refiningmethod. (3) (ii) Distinguishbetweenoresandmineralswithsuitableexample. (2)35. (i) DeterminethenumberofelectronsintheIstshellandmentionthevaluesofitsquantum

numbers. (3) (ii) WriteanoteonprincipalQuantumNumber. (2)

(or) (i) ExplaintheliquificationofgasesbyClaude’smethod. (3) (ii) ClassifythefollowinggasesNH3, N2, H2, CO2 as “permanent” and “temporary” gases. (2)36. CalculatethelatticeenthalpyofCaCl2giventhattheenthalpyof (i) sublimationofCais121KJmol–1 (ii)DissociationofCl2to2Clis242.8KJmo

–1

(iii) IonizationofCatoCa2+is2422KJmol–1

(iv) ElectrongainforCltoCl–is–355KJmol–1 (v)∆Hºfoverallis–795KJmol–1

(or) DistinguishbetweenOrderandMolecularityofareaction37. (i) CommentontheconstantvalueofEnthalpyofneutralizationbetweenstrongacidand

strong Base. (3) (ii) DefineZerothlawofthermodynamics (2) (or) (i) Discusstheprincipleandprocedureinvolvedinpurificationoforganiccompoundby

paper Chromatography. (3) (ii) Whyorganiccompoundsneedtobepurified (2)38. a. Givethestructuralformulafor (i) But-1-ene (ii) 2-methyl2-propanol (iii) MethoxyEthane (iv) Ethanedioicacid (v) (N-methylamino)methane

(or) b. Anorganiccompound(A)ofMolecularformulaC7H8ontreatmentwithCl2 in the presence

of sunlight togivecompound (B)ofmolecular formulaC7H7Cl.Compound (B) reactwithZn-Cucoupletogivebackcompound(A).Compound(B)onmildoxidationwithCu(NO3)2gives(C)C7H6O.Identify(A),(B),(C).Explainthereactions.

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11thSTD.

Time : 2½ Hours Chemistry Max. Marks : 70

sura’s Model Question PaPer - 1Based on Scheme of Examination as per G.O. (2D) No.50 dated 09-08-2017

Part - II. Answer all the questions. [15 × 1 = 15] Choose the most appropriate answer 1. Thetotalnumberofmolespresentin111gofCaCl2 is ............... .

(a) Onemole (b) Twomoles (c) Threemoles (d) Fourmoles2. Amineralfromwhichmetalcanbeprofitablyextractediscalled................

(a) roasting (b) ore (c) smelting (d) alltheabove3. Whichofthefollowinghasnoneutronsinthenucleus?

(a) Deuterium (b) Helium (c) Hydrogen (d) Tritium(e) Analphaparticle.

4. Whichelementhasthegreatesttendencytoloseelectrons?(a) Chlorine (b) Sulphur (c) Francium (d) Berylium

5. Deuteriumwithoxygengives(a) oxydeuterium (b) water (c) heavywater (d) alltheabove

6. Quicklimeis................(a) Calciumoxide (b) Calciumhydroxide(c) Calciumnitrate (d) Calciumsulphate

7. Metallicoxidesaregenerally................(a) acidic (b) basic (c) amphoteric (d) neutral

8. EachunitcellofNaClconsistsof4chlorineionsand.................(a) 13 Na atoms (b) 4 Na atoms (c) 6 Na atoms (d) 8 Na atoms

9. Thecompoundwhichcontainsbothionicandcovalentis_______.(a) CH4 (b) H2 (c) KCN (d) KCl

10. Incoldcountries,ethyleneglycolisaddedtowaterintheradiatorsofcarsduringwinters.Itresultsin:_______.(a) Loweringboilingpoint (b) Reducingviscosity(c) Reducingspecificheat (d) Loweringfreezingpoint

11. Whichofthefollowingisreversibleprocess?(a) Diffusion (b) melting (c) neutralization (d) combustion

12. IntheheterogenousequilibriumCaCO CaO COs s3 2( ) ( ) ( )� ⇀�↽ �� + g the Keqvalueisgivenby,

(a) partialpressureofCO2 (b) activityCaO(c) activitiesofCaCO3 (d) [CaO]/[CaCO3]

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13. Theelementarystepwithslowraterepresents__________(a) rate determining step (b) maximum rate step(c) thirdorderrate (d) overallorder

14. ColumnChromatographyisbasedontheprincipleof__________.a) Adsorption b) Partition c) Absorption d) Distribution

15. Alkylmagnesiumhalidesareknownas________.(a) Grignardreagent (b) Baeyer’sreagent (c) halogenacids (d) alkylhalides

Part - II

II. Answer Any Six Questions in which Question No.21 is compulsory [6 × 2 = 12]16. WhatisAvogadro’sNumber?

17. Whatismeantbyprincipalquantumnumber?

18. WhynitrogenhashigherI.E.valuethanoxygen?

19. Write about the reducing property of hydrogen peroxide.

20. Mention any 2 uses of ozone.21. What are the different types of bonds?

22. Definefirstlawofthermodynamics.

23. Definelawofmassaction.

24. Definesteamdistillation.

Part - III

III. Answer Any Six Questions in which Question No.30 is compulsory [6 × 3 = 18]25. What is the mass in grams of a hydrogen chloride, HCl? 26. Writeshortnoteonsourceofelementinlivingsystem.27. Writeelectronicconfigurationsfortheelementsofatomicnumbers6and14andfromthisfind

outofwhichgroupintheperiodictableeachelementsbelongs.28. Discusesthenatureofhydridesofp-blockelements.29. MentionthenumberofcesiumandchlorideionsineachunitcellofCsCl.30. Defineanadiabaticprocess.31. Whatissecondorderreaction?Giveanexample.32. Howisteryleneprepared?33. Whatistheprincipleusedinchromatography?

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Part - IVIV. Answer all the questions. [5 × 5 = 25] 34. (i) HownickelisextractedbyMond’sprocess? (3) (ii) UsingtheAufbauprinciple,writetheelectronicconfigurationinthegroundstateofthe

followingatoms:Boron(Z=5)Neon(Z=10)andAluminium(Z=13). (2)(OR)

(i) ExplainthesizeofgroupCl– > Na+. (3) (ii) Whatdoyoumeanbyionizationenthalpy?Howdoesitvaryacrossaperiodanddowna

group? (2)35. (i) Howisboraxpreparedfromcolemanite? (3) (ii) Whysiliconcarbideisusedasanabrasive? (2)

(OR) (i) Ametallicelementexistsasacubiclattice.Eachedgeoftheunitcellis2.88Å.The

densityofthemetalis7.20gcm–3.Howmanyunitcellstherewillbein100gofthemetal? (3)

(ii) DiscussthepartialcovalentcharacterinioniccompoundsusingFajan’srule. (2)36. (i) WritethelimitationsofVanderwaalequationofstate. (3) (ii) Mentionanytwochemicalpropertiesofalkanes. (2)

(OR) (i) What is hydroboration? (3) (ii) Howisbenzeneispreparedcommercially? (2)37. (i) Discusstheshapesoffollowingmolecules:NH3. (3) (ii) ExplainthepolarityofcovalentbondsinH2O. (2)

(OR) Calculatetheenthalpyofcombustionofethyleneat300Katconstantpressureifitsenthalpy

ofcombustionatconstantvolumeis-1406kJmol–1.38. (i) Howisethylenehydrated? (3) (ii) ConvertingMolestoGrams: ZnI2,canbepreparedbythedirectcombinationofelements.Achemistdeterminesfrom

theamountsofelementsthat0.0654molZnI2 can be formed. (2)(OR)

Calculate thepartial pressuresofO2 and H2 in amixtureof3molesofO2 and1moleof H2 at S.T.P.

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11thSTD.

Time : 2½ Hours Chemistry Max. Marks : 70

sura’s Model Question PaPer - 2Based on Scheme of Examination as per G.O. (2D) No.50 dated 09-08-2017

Part - II. Answer all the questions. [15 × 1 = 15] Choose the most appropriate answer 1. Whichofthefollowingpairofspecieshavesamenumberofatomsundersimilarconditions?

(a) 1L each of SO2 and CO2 (b) 2L each of O3 and O2

(c) 1L each of NH3andCl2 (d) 1L each of NH3 and 2L of SO2

2. ................ is used as a foaming agent.

(a) slag (b) flux (c) pineoil (d) matrix3. Themaximumnumberofelectronsthatcanbeaccommodatedinthenthlevelis...............

(a) n2 (b) n+1 (c) n–1 (d) 2n2 (e) 2 + n.

4. Whichofthefollowingwillhavelowestfirstionizationenthalpy?(a) Na (b) Al (c) Mg (d) Si

5. Iftheelementcanloseanelectronreadily,theyaresaidtobe(a) electronegative (b) electropositive (c) electronative (d) electrovalent

6. Thecompoundusedinmakingmouldsforstatuesis................(a) Epsomsalt (b) Calciumsulphide (c) Plasterofparis (d) Gypsum

7. Anaesthetic used for minor operation dentistry ............... .(a) nitrous oxide (b) nitric oxide (c) nitrous oxide + oxygen (d) nitrogen dioxide

8. Inafacecentredcubiccell,anatomatthefacecentreissharedby.................(a) 4unitcell (b) 2unitcells (c) 1unitcells (d) 6unitcells

9. Thetendencyofatomshavingeightelectronsintheoutermostshellis_______rule.(a) Hund’s (b) Octet (c) Lewis (d) Kossel

10. Propertieswhichdependonlyonnumberofparticlespresentinsolutionarecalled_______.(a) Additive (b) Constitutive (c) Colligative (d) None

11. Inwhichprocess,workismaximum?(a) reversible (b) irreversible (c) exothermic (d) cyclic

12. FortheequilibriumreactionH I HI2 2 2( ) ( ) ( )g g g+ � ⇀�↽ ��(a) Kp = Kc (b) Kp > Kc (c) Kp < Kc (d) Kp=1/Kc

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13. mol.dm-3 sec-1istheunitof__________(a) rate (b) rateconstant (c) order (d) activemass

14. Theexistenceofwiderangeoforganiccompoundsisduetotheirpropertyof__________.a) Extensivecatenation b) Lowerboilingpointsc) Polymerisation d) Isomerism

15. Electrolysisofsodiumacetategives__________.(a) Ethane (b) Ethylene (c) Methane (d) Acetylene

Part - II

II. Answer Any Six Questions in which Question No.21 is compulsory [6 × 2 = 12]16. DefineEmpiricalFormula.

17. Whatisshapeoftheorbitalwith(i)n = 2 and l = 0 ; (ii) n = 2 and l = 1?

18. WhatpropertydidMendeleevusetoclassifyelementsinhisperiodictable?

19. Whydoberylliumhalidesfumeinair?

20. GivethevaluesofR-gasconstantincaloriesandJoules.21. Whatarecolligativeproperties?

22. Givetherelationbetween∆Uand∆H.

23. DefineLawofMassaction.

24. What are the types of paper chromatography?

Part - III

III. Answer Any Six Questions in which Question No.30 is compulsory [6 × 3 = 18]25. Howmanymoleculesarethereina3.46gsampleofhydrogenchloride,HCl?

26. Calculatetheoxidationnumberofunderlinedelementsinthefollowingspecies.MnSO4

27. Outoffluorineandchlorine,whichhasgreaterelectrongainenthalpy?

28. WhatareMillerIndices?

29. What is meant by hybridisation?

30. What are the Characteristics of free energy?

31. InIorderreactiontheinitialconcentrationofthereactantas0.05mole/litreandtherateconstant1.5 × 10-3 min-1.Whatistheinitialrateofthereaction.

32. Whatisaldolcondensation?

33. Differentiatepaperandthinlayerchromatography.

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Part - IVIV. Answer all the questions. [5 × 5 = 25] 34. (i) CalculatethemassofCO2thatwouldbeobtainedbycompletelydissolving10kgofpure

CaCO3inHCl. (3)

(ii) What is Zone refining? (2)(OR)

(i) DescribeAufbauprinciple. (3)

(ii) Why is Na atom bigger than the atoms of both Lithium and Magnesium? (2)

35. (i) Whydoesthefirstionizationenthalpywouldhavehigherelectrongainenthalpy? (3)

(ii) Howislithiumextractedfromitsore? (2)

(OR)

(i) What are ortho and para hydrogen? (3)

(ii) Whatarealkalineearthmetals?Whyaretheycalledso? (2)

36. (i) Writenotesonthefollowing:Acidicoxides (3)

(ii) DefineandexplaintheCrystallinesolids (2)

(OR)

(i) DiscussE2elimination. (3)

(ii) Discusstheimportantpropertiesofelectrovalentcompounds. (2)

37. (i) 10gofanorganicsubstancewhendissolvedintwolitresofwatergaveanosmoticpressureof0.59atm,at7ºC.Calculatethemolecularweightofthesubstance. (3)

(ii) Differentiateirreversibleandreversiblereactions. (2)

(OR)

(i) Describethefactorsonwhichtherateofareactiondepends.

(ii) Addition reaction. (2)

38. (i) Explainthepurificationofcompoundsbyusingthinlayerchromatography. (3)

(ii) Howisethylenehydrated? (2)

(OR)

AnorganiccompoundcontainsC,HandO.0.2475gof theorganiccompoundyieldedoncombustion 0.4950 g of CO2 and 0.2025 g of H2O. Find the percentage composition of the organic compound.

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