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28. Assertion : A rocket moves forward by pushing thesurrounding air backwards.Reason : It derives the necessary thrust to moveforward, according to Newton's third law of motion.(A) Both Assertion and Reason are true and Reasonis a correct explanation of the Assertion(B) Both Assertion and Reason are true but Reason isnot a correct explanation of the Assertion(C) Both Assertion and Reason are false(D) Assertion is false but the Reason is true29. While slipping on rough spherical surface of radius'R', block A of mass 'm' comes with velocity 1 .4gRat bottom B. Work done in slipping the block from'B' to 'C' is –(A)mgR4(C) 1.3 mgRmAB(B) mgRC(D) 45 mgR30. A 2000 kg rocket in free space expels 0.5 kg of gasper second at exhaust velocity 400 ms –1 for 5seconds. What is the increase in speed of rocket inthis time -(A) 2000 ms –1 (B) 200 ms –1(C) 0.5 ms –1 (D) zeroCHEMISTRY31. Which of the following can act as a both Bronstedacid & Bronsted base -(A) Na 2 CO 3 (B) OH ––(C) HCO 3 (D) NH 332. In which compound the oxidation No. of Oxygenis + 21 -(A) OF 2 (B)O 2 F 2(C) O 2 [PtF 6 ] (D) KO 233. The favourable conditions for a spontaneousreactions are -(A) T ∆S > ∆H, ∆H = ⊕ , ∆S = ⊕(B) T ∆S > ∆H, ∆H = ⊕ , ∆S = Θ(C) T ∆S = ∆H, ∆H = Θ , ∆S = Θ(D) T ∆S = ∆H, ∆H = ⊕ , ∆S = ⊕34. The substance not likely to contains CaCO 3 is -(A) Dolomite (B) A marble statue(C) Calcined Gypsum (D) Sea shells35. On mixing 10ml of acetone with 50ml of CHCl 3 , thetotal volume of the solutions-(A) < 60ml(B) > 60ml(C) = 60ml(D) unpredictable36. On addition of He gas at constant volume to thereaction N 2 + 3H 2 2NH 3 at equilibrium-(A) The reaction stops(B) Forward reactions is favoured(C) Reaction remains unaffected(D) Backward reactions is favoured37. The half life of a reaction is 24 hours . If we startwith 10gm of reactant, How many grams of it willreaction after 96 hours, (I order reaction)(A) 0.625gm (B) 6.25gm(C) 1.25gm (D) 0.125gm38. The current is passed in Ag 2 SO 4 aqueous solution &1.6 gm O 2 is obtained. The amount of Ag depositedwill be- [Ag = 108gm](A) 107.8g (B) 1.6g (C) 0.8g (D) 21.6g39. In decinormal solution CH 3 COOH is ionized to theextent of 1.3% find the pH of solution.(A) 3.89 (B) 2.89 (C) 4.89 (D) 5.8940. A FCC element (atomic wt.= 60) has a cell edge of400pm. Its density is-(A) 6.23 g/cm 3 (B) 6.43 g/cm 3(C) 6.53 g/cm 3 (D) 6.63 g/cm 341. Which set of quantum No. is not possiblenl m s(A) 2 0 0 +1/2(B) 4 2 –3 –1/2(C) 3 2 –2 +1/2(D) 2 1 0 +1/242. Give simplest formula of compound whichcontaining 6gm C, 3.01×10 23 atom O and 2 mole Hatoms-(A) CH 2 O (B) CH 4 O (C) CHO (D) CH 3 O43. The IUPAC Name of(A) 1,2-dimethyl Cyclohexene(B) 2,3-dimethyl Cyclohexene(C) 1,2-dimethyl Cyclohex-2-ene(D) 5,6-dimethyl Cyclohex-1-ene44. Which of the following reagent can make distinctionbetween Pri. and Sec. amines ?(A) NH 3(B) NaNO 2 /HCl(C) HCl(D) AllXtraEdge for IIT-JEE 72APRIL 2010
45. Toluene reacts with Cl 2 in the presence of light togive -(A) Benzyl chloride (B) Benzoyl chloride(C) p-chlorotoluene (D) o- chlorotoluene46. Which compound is formed when excess of KCN isadded to an aqueous solution of copper sulphate(A) Cu (CN) 2 (B) K 2 [Ca(CN) 4 ](C) K [Cu(CN) 2 ] (D) K 3 [Cu(CN) 4 ]47. The Blue Print Process involves the use of-(A) Indigo dyes (B) Iron compound(C) Vat dyes (D) some other compounds48. The ionic radii of N 3– , O 2– , F – and Na + follow theorder-(A) N 3– > O 2– > F – > Na + (B) N 3– > Na + > O 2– > F –(C) Na + > O 2– > N 3– > F – (D) O 2– > F – > Na + > N 3–49. Reactionxy 2 xy + y(g) (g) (g)Initial pressure of xy 2 is 600 mm Hg & total pressureat equilibrium is 800 mm Hg. Kp of reaction is -(A) 50 (B) 100 (C) 166.6 (D) 40050. Cell: Zn|Zn +2 || Cu +2 | CuIf the correct reactions of Zn +2 & Cu +2 ions aredoubled, the emf of the cells:(A) doubled (B) halved(C) same(D) zero51. What is the pH of buffer solution containing 12gCH 3 COOH & 16.4g CH 3 COONa in 500ml ofsolution (Ka for CH 3 COOH = 1.8×10 –5 ).(A) 4.7447 (B) 4.4774(C) 4.4477(D) None52. How many moles of ferrous oxalate are completelyoxidized by 1 mole KMnO 4 in acidic medium-(A) 3/5 (B) 5/3(C) 1/5 (D) 553. In an irreversible process taking place at constant-T& P and which only pressure-volume work is beingdone, than (dG) and (dS), satisfy the criteria-(A) (dS) V, E > 0, (dG) T,P < 0(B) (dS) V, E = 0, (dG) T,P = 0(C) (dS) V, E = 0, (dG) T,P > 0(D) (dS) V, E < 0, (dG) T,P < 054. 3,3-dimethylbutan-2-ol, on reaction with Conc.H 2 SO 4 at 443K will give…… as major product-(A) 3,3-dimethyl but-1-ene(B) 2,3-dimethyl but-2-ene(C) 2,2-dimethyl but-2-ene(D) 2,2-dimethyl-1- butene55. Select the true statement about benzene fromamongst the following-(A) Because unsaturation benzene easily undergoesaddition reaction(B) There are two types of C-C bonds in benzenemolecule(C) There is a cyclic delocalisation of π es – inbenzene(D) Monosubstitution of benzene group gives threeisomeric substances56.(A)(C)OHZndustH CCl3⎯⎯⎯→B⎯⎯− ⎯⎯ →K4⎯ alk.KMnOAlCl3⎯⎯ ⎯⎯ →D. Identity ‘D’ ?CH 3CHO(B)(D)COOH57. In Lassaigne’s test, the organic compound isfirst fused with sodium metal. The sodiummetal is used because(A) The melting point of sodium metal is low(B) Sodium metal reacts with elements presentin organic compounds to form inorganiccompounds(C) All sodium salts are soluble in water(D) All the above58. Concentrated hydrochloric acid when kept in open airsometimes produces a cloud at white fumes theexplanation for it is that-(A) Oxygen in air reacts with the emitted HCl gas toform a cloud of chlorine gas(B) Strong affinity of HCl gas for moisture in airresults in forming of droplets of liquid solutionwhich appears like a cloudy smoke(C) Due to strong affinity for water concentratedhydrochloric acid pulls moisture of air towardsitself. This moisture forms droplets of water andhence the cloud.(D) Concentrated hydrochloric acid emits stronglysmelling HCl gas all the time59. Consider the following complex[Co(NH 3 ) 5 CO 3 ]ClO 4The coordination number, oxidation number, numberof d-electrons and number of unpaired electrons onthe metal respectively-(A) 6, 3, 6, 0 (B) 7, 2, 7, 1(C) 7, 1, 6, 4 (D) 6, 2, 7, 3XtraEdge for IIT-JEE 73APRIL 2010
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Volume - 5 Issue - 10April, 2010 (M
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Volume-5 Issue-10April, 2010 (Month
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Hospital in Parel and ApolloHospita
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KNOW IIT-JEEBy Previous Exam Questi
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CHEMISTRY6. From the following data
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(ii)OHH + CH 3OH⊕PorClPClClOCH 3O
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Physics Challenging ProblemsSet #12
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8 QuestionsSolutionSet # 11Physics
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8 QuestionsSolutionSet # 12Physics
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PHYSICSSStudents'ForumExpert’s So
Page 24 and 25: If the body loses this heat in time
Page 26 and 27: Perfect gas equation :From the kine
Page 28 and 29: The internal energy of n molecules
Page 30 and 31: * The binding energy per nucleon is
Page 32 and 33: KEY CONCEPTOrganicChemistryFundamen
Page 34 and 35: KEY CONCEPTPhysicalChemistryFundame
Page 36 and 37: UNDERSTANDINGOrganic Chemistry1. An
Page 38 and 39: The starting compound (A) reacts wi
Page 40 and 41: `tà{xÅtà|vtÄ V{tÄÄxÇzxá12Se
Page 43 and 44: MATHEMATICAL CHALLENGESSOLUTION FOR
Page 45 and 46: A 2 ⎛ 3s − 2s ⎞ s≤ s ⎜
Page 47 and 48: 5. Let z 1 , z 2 and z 3 are unimod
Page 49 and 50: If I n =∫x n . e ax dx, then I n
Page 51 and 52: The common difference of an A.P. is
Page 53 and 54: XtraEdge for IIT-JEE 51APRIL 2010
Page 55 and 56: 4. Consider the following reactions
Page 57 and 58: 15. What would be the structure of
Page 59 and 60: 14. If line lies inside the region
Page 61: 6. A BTwo containers A & B contain
Page 64 and 65: MOCK TEST FOR IIT-JEEPAPER - IITime
Page 66 and 67: SECTION - IVInteger answer typeThis
Page 68 and 69: X Y Z W0123456789012345678912. If z
Page 70 and 71: (C) Pressure at A > pressureat B(D)
Page 72 and 73: 7. Experimental verification of New
Page 76 and 77: 60. Point out the incorrect stateme
Page 78 and 79: MOCK TEST - BIT-SATTime : 3 Hours T
Page 80 and 81: 22. The displacement of interfering
Page 82: 40. A body of mass 2 kg is being dr
Page 85 and 86: 10. The foci of a hyperbola coincid
Page 87 and 88: LOGICAL REASONING1. Fill in the bla
Page 89 and 90: SOLUTION FOR MOCK TESTIIT-JEE (PAPE
Page 91 and 92: or 0.1 v α + 1 = 2 + 2 × 10 -2 ×
Page 93 and 94: 12.[A, B, C, D]13.[B]2x t − 5t +
Page 95 and 96: R l=sin 45º sin 30ºR sin 45º = =
Page 97 and 98: 1.[C]2.[B]3.[B]SOLUTION FOR MOCK TE
Page 99 and 100: 5.[A,B,D] We have adj A = |A| A -1a
Page 101 and 102: (1, 1)7λ 5.5× 10t min = =P4n 4×1
Page 103 and 104: K TFor a cylinder = 2 in case ofK R
Page 105 and 106: ∴17.[C]Potential of shell A is,1
Page 107 and 108: 39.[B] Solution is decinormal, that
Page 109 and 110: 71.[B]which is a H.P.n th term of c
Page 111 and 112: 85.[C] Letters of word 'STATISTICS'
Page 113 and 114: 13. [B] Point P lies on the arms CD
Page 115 and 116: 33. [B] For quarter revolution∆ V
Page 117 and 118: 16.[A]NH 2⎯ 0−5°C+ NaNO 2 + 2H
Page 119 and 120: 11.[B]→ →∴ α & β are two mu
Page 121 and 122: 1/ 21 -2∫2 x 2 dx⇒⇒01 2 - 3 2
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8.[A]9.[A]10.[B]To take off :irrele
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CAREER POINTIn associationwithLaunc
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