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Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
Aieee Chemistry  2004
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Aieee Chemistry 2004

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    • 1. AIEEE–Past papers
      CHEMISTRY- UNSOLVED PAPER - 2004
    • 2. SECTION – A
      Single Correct Answer Type
      There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate
    • 3. 01
      Problem
       Which of the following sets of quantum numbers is correct for an electron in 4f orbital ?
       
      n = 4, l = 3, m = + 4, s = + 1/2
      n = 4, l = 4, m = - 4, s = - 1/2
      n = 4, l = 3, m = + 1, s = + 1/2
      n = 3, l = 2, m = -2, s = + ½
    • 4. Problem
      02
      Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthally quantum numbers, l = 1 and 2 are, respectively :
       
      12 and 4
      12 and 5
      16 and 4
      16 and 5
    • 5. Problem
      03
      Which one of the following ions has the highest value of ionic radius ?
       
      Li+
      B3+
      O2-
      F-
    • 6. Problem
      04
      The wavelength of the radiation emitted when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097 x 107 m-1) :
       
      91 mm
      192 mm
      406 nm
      9.1 x 10-8 nm
    • 7. Problem
      05
      The correct order of bond angles (smallest first) in H2S, NH3, BF3 and SiH4 is :
       
      H2S < SiH4 < NH3 < BF3
      NH3 < H2S < SiH4 < BF3
      H2S < NH3 < SiH4 < BF3
      H2S < NH3 < BF3 < SiH4
    • 8. Problem
      06
      Which one of the following sets of ions represents the collection of isoelectromic species
       
      K+, Ca2+, Sc3+, Cl-
      Na+, Ca2+, Sc3+, F-
      K+, Cl-, Mg2+, Sc3+
      Na+, Mg2+, Al3+, Cl-
      (Atomic numbers F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)
    • 9. Problem
      07
      Among Al2O3, SiO2, P2O3 and SO2 the correct order of acid strength is :
       
      SO2 < P2O3 < SiO2 < Al2O3
      SiO2 < SO2 < Al2O3 < P2O3
      Al2O3 < SiO2 < SO2 < P2O3
      Al2O3 < SiO2 < P2O3 < SO2
    • 10. Problem
      08
      The bond order in NO is 2.5 while that in NO+ is 3. Which of the following statements is true for these two species ?
       
      Bond length in NO+ is greater than in NO
      Bond length in NO is greater than in NO+
      Bond length in NO+ is equal to that in NO
      Bond length is unpredictable
    • 11. Problem
      09
      The formation of the oxide ion O2- (g) requires first an exothermic and then an endothermic step as shown below.
      O(g) + e- = O-(g) ; ∆H0 = - 142 kJmol-1
      O(g)- + e- = O2-(g) ; ∆H0 = 844 kJ mol-1
      This is because :
      Oxygen is more electronegative
      Oxygen has high electron affinity
      O- ion will tend to resist the addition of another electron
      O- ion has comparatively larger size than oxygen atom
    • 12. Problem
      10
      The sates of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively :
       
      sp2 and sp2
      sp2 and sp3
      sp3 and sp2
      sp3 and sp3
    • 13. Problem
      11
      Which one of the following has the regular tetrahedral structure ?
       
      XeF4
      SF4
      BF
      [Ni(CN)4]2-
      (Atomic numbers B = 5, S = 16, Ni = 28, Xe = 54)
    • 14. Problem
      12
      Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them ?
       
      (n - 1)d8 ns2
      (n - 1)d5 ns1
      (n - 1)d3 ns2
      (n - 1)d5 ns2
    • 15. Problem
      13
      As the temperature is raised from 200C to 400C the average kinetic energy of neon atoms changes by a factor of which of the following ?
       
      a. ½
      b.
      c. 313/293
      d. 2
    • 16. Problem
      14
      The maximum number of 900 angles between bond pair-bond pair of electrons is observed in :
       
      dsp3 hybridization
      sp3d hybridization
      dsp2 hybridization
      sp3d2 hybridization
    • 17. Problem
      15
      Which one of the following aqueous solutions will exhibit highest boiling point ?
       
      0.01 M Na2SO4
      0.01 M KNO3
      0.015 M urea
      0.015 M glucose
    • 18. Problem
      16
      Which among the following factors is the most important in making fluorine the strongest oxidizing agent ?
       
      Electron affinity
      Ionization enthalpy
      Hydration enthalpy
      Bond dissociation energy
    • 19. Problem
      17
      In van der Waals equation of state of the gas law, the constant ‘b’ is a measure of:
       
      Intermolecular repulsions
      Intermolecular attraction
      Volume occupied by the molecules
      Intermolecular collisions per unit volume
    • 20. Problem
      18
      The conjugate base of H2PO is :
       
      PO43-
      P2O5
      H3PO4
      HPO42-
    • 21. Problem
      19
      6.02 x 1020 molecules of urea are present in 100 mL of its solution. The concentration of urea solution is :
       
      0.001 M
      0.01 M
      0.02 M
      0.1 M
      (Avogadro constant, NA = 6.02 x 1023 mol-1)
    • 22. Problem
      20
      To neutralize completely 20 mL of 0.1 M aqueous solution of phosphorous acid (H3PO3), the volume of 0.1 M aqueous KOH solution required is :
       
      10 mL
      20 mL
      40 mL
      60 mL
    • 23. Problem
      21
      For which of the following parameters the structural isomers C2H5OH and CH3OCH3 would be expected to have the same values ? (Assume ideal behaviour) :
       
      Heat of vaporization
      Vapour pressure at the same temperature
      Boiling points
      Gaseous densities at the same temperatures and pressure
    • 24. Problem
      22
      Which of the following liquid pairs shows a positive deviation from Raoult’s law ?
       
      Water - hydrochloric acid
      Benzene - methanol
      Water - nitric acid
      Acetone - chloroform
    • 25. Problem
      23
      Which one of the following statements is false ?
       
      Raoult’s law states that the vapour pressure of a component over a solution is proportional to its mole fraction
      The osmotic pressure ( ) of a solution is given by the equation = MRT, where M is the molarity of the solution
      The correct order of osmotic pressure for 0.01 M aqueous solution of each compound is BaCl2 > KCl > CH3COOH > sucrose
      Two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression
    • 26. Problem
      24
      What type of crystal defect is indicated in the diagram below ?
       
      Na+, Cl-, Na+, Cl-, Na+, Cl-
       
      Frenkel defect
      Schottky defect
      Interstitial defect
      Frenkel and Schottky defects
    • 27. Problem
      25
      An ideal gas expands in volume from 1 x 10-3 to 1 x 10-2 m3 at 300 K against a constant pressure of 1 x 105 Nm-2. The work done is :
       
      - 900 J
      - 900 kJ
      270 kJ
      900 kJ
    • 28. Problem
      26
      In hydrogen-oxygen fuel cell, combustion of hydrogen occurs to :
       
      Generate heat
      Create potential difference between the two electrodes
      Produce high purity water
      Remove adosred oxygen from electrode surfaces
    • 29. Problem
      27
      In a first order reaction, the concentration the reactant, decreases frm 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is :
       
      30 min
      15 min
      7.5 min
      60 min
    • 30. Problem
      28
      What is the equilibrium expression for the reaction P4(s) + 5O2(g) P4O10(s) ?
       
      a.
      b.
      c. KC = [O2]5
      d.
    • 31. Problem
      29
      For the reaction, CO(g) + Cl2 (g) COCl2(g), the Kp/Kc is equal to:
       
      a.1/RT
      b. RT
      c.
      d. 1.0
    • 32. Problem
      30
      The equilibrium constant for the reactions N2(g) + O2 (g) 2NO(g) at temperature T is 4 x 10-4. The value Kc for the reaction : at the same temperature is :
       
      2.5 x 102
      50
      4 x 10-4
      0.02
    • 33. Problem
      31
      The rate equation for the reaction 2A + B-> C is fond to be : are = k [A] [B].
      The correct statement in relation to this reaction is that the :
       
      Unit of k must be s-1
      t1/2 is a constant
      rate of formation of C is twice the rate of disappearance of A
      value of k is independent of the initial concentrations of A and B
    • 34. Problem
      32
      Consider the following E0 values :
      Eo Fe3+/Fe2+ = +0.77V
      EoSn2+/Sn = -0.14 V
      Under standard conditions the potential for the reaction
      Sn(s) + 2Fe3+(aq) 2Fe2+ (aq) + Sn2+ (aq) is :
       
      1.68 V
      1.40 V
      0.91 V
      0.63 V
    • 35. Problem
      33
      The molar solubility(in mol L-1) of a sparingly soluble salt MX4 is ‘s’ the corresponding solubility product is Ksp. s is given in terms of Ksp by the relation :
       
      s = (Ksp/128)1/4
      s = (128 Ksp)1/4
      s = (256 Ksp)1/5
      s = (Ksp/256)1/5
    • 36. Problem
      34
      The standard e.m.f. of a cell, involving one electron change is found to be 0.591 V at 250C. The equilibrium constant of the reaction is (F = 96,500 C mol-1, R = 8.314 JK-1 mol-1) :
       
      1.0 x 101
      1.0 x 105
      1.0 x 1010
      1.0 x 1030
    • 37. Problem
      35
      The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 kJ mol-1 respectively. The enthalpy of formation of carbon monoxide per mole is
      110.5 kJ
      -110.5 kJ
      -676.5 kJ
      676.5 kJ
    • 38. Problem
      36
      The limiting molar conductivities ^0 for NaCl, KBr and KCl are 126, 152 and 150 S cm2 mol-1 respectively. The ^0 for NaBr is :
       
      128 S cm2 mol-1
      176 S cm2 mol-1
      278 S cm2 mol-1
      302 S cm2 mol-1
    • 39. Problem
      37
      In a cell that utilizes the reaction Zn(s) + 2H (aq) -> Zn2+ (aq) + H2 (g) addition of H2SO4 to cathode compartment, will :
       
      Lower the E and shift equilibrium to the left
      Lower the E and shift the equilibrium to the right
      Increase the E and shift the equilibrium to the right
      Increase the E and shift the equilibrium to the left
    • 40. Problem
      38
      Which one of the following statements regarding helium is incorrect ?
       
      It is used to fill gas balloons instead of hydrogen because it is lighter and non-inflammable
      It is used as a cryogenic agent for carrying out experiments at low temperatures
      It is used to produce and sustain powerful superconducting magnets
      It is used in gas-cooled nuclear reactors
    • 41. Problem
      39
      Identify the correct statement regarding enzymes :
       
      Enzymes are specific biological catalysts that can normally function at very high temperatures (T ~ 1000 K).
      Enzymes are normally heterogeneous catalysts that are very specific in their action
      Enzymes are specific biological catalysts that cannot be poisoned
      Enzymes are specific biological catalysts that possess well defined active sites.
    • 42. Problem
      40
      One mole of magnesium nitride on the reaction with an excess of water gives:
       
      One mole of ammonia
      One mole of nitric acid
      Two moles of ammonia
      Two moles of nitric acid
    • 43. Problem
      41
      Which one of the following ores is best concentrated by froth-floatation method ?
       
      Magnetite
      Cassiterite
      Galena
      Malachite
    • 44. Problem
      42
      Beryllium and aluminum exhibit many properties which are similar. But, the two elements differ in :
       
      Exhibiting maximum covalency in compounds
      Forming polymeric hydrides
      Forming covalent halides
      Exhibiting amphoteric nature in their oxides
    • 45. Problem
      43
      Aluminum chloride exists as dimmer, Al2Cl6 in solid state as well as in solution of non-polar solvents such as benzene, when dissolved in water, it gives :
       
      Al3+ + 3Cl-
      [Al(H2O)6]3+ + 3Cl-
      [Al(OH)6]3- + 3HCl
      Al2O3 + 6HCl
    • 46. Problem
      44
      The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to :
       
      A change in the crystalline structure of tin
      An interaction with nitrogen of the air at very low temperatures
      A change in the partial pressure of oxygen in the air
      An interaction with water vapour contained in the humid air
    • 47. Problem
      45
      The values for Cr, Mn, Fe and Co are -0.41, + 157, + 0.77 and + 1.97 V respectively. For which one of these metals the change in oxidation state from + 2 to + 3 is easiest ?
       
      Cr
      Mn
      Fe
      Co
    • 48. Problem
      46
      Excess of KI reacts with CuSO4 solution and the Na2S2O3 solution is added to it. Which of the statements is incorrect for this reaction ?
       
      Cu2I2 is formed
      CuI2 is formed
      Na2S2O3 is oxidized
      Evolved I2 is reduced
    • 49. Problem
      47
      Among the properties (A) reducing (B) oxidizing (C) complexing, the set of properties shown by CN- ion towards metal species is :
       
      A, B
      B, C
      C, A
      A, B, C
    • 50. Problem
      48
      The co-ordination number of a central metal atom in a complex is determined by
       
      The number of ligands around a metal ion bonded by sigma bonds
      The number of ligands around a metal ion bounded by pi-bonds
      The number of ligands around a metal ion bounded by sigma and pi-bonds both
      The number of only anionic ligands bonded to the metal ion
    • 51. Problem
      49
       Which one of the following complexes is an outer orbital complex ?
       
      [Fe(CN)6]4-
      [Mn(CN)6]4-
      [Co(NH3)6]3+
      [Ni(NH3)6]2+
      (Atomic numbers Mn = 25, Fe = 36, Co = 27, Ni = 28)
    • 52. Problem
      50
      Co-ordination compounds have great importance in biological systems. In this context which of the following statements is incorrect ?
      Chlorophylls are green pigments in plants and contain calcium
      Haemoglobin is the red pigment of blood and contains iron
      Cyanocobalamin is vitamin B12 and contains cobalt
      Carboxypeptidase-A is an enzyme and contains zinc
    • 53. Problem
      51
      Cerkum (Z = 58) is an important member of the lanthanoids. Which of the following statements about cerium is incorrect ?
       
      The common oxidation states of cerium are + 3 and + 4
      The + 3 oxidation state of cerium is more stable than the + 4 oxidation state
      The + 4 oxidation state of cerium is not known in solutions
      Cerium (IV) acts as an oxidizing agent
    • 54. Problem
      52
      Which one of the following has largest number of isomers ?
       
      [Ru (NH3)4 Cl2]+
      [Co (NH3)5Cl]2+
      [Ir(PR3)2 H(CO)]2+
      [Co(en)2Cl2]+
      (R = alkyl group, en = ethylenediamine)
    • 55. Problem
      53
      The correct order of magnetic moments (spin only values in B.M.) among the following is
       
      [MnCl4]2- > [CoCl4]2- > [Fe(CN6)]4-
      [MnCl4]2-> [Fe(CN6)]4-> [CoCl4]2-
      Fe(CN6)]4- > [MnCl4]2- > [CoCl4]2-
      [Fe(CN6)]4-> [CoCl4]2-> [MnCl4]2-
      (Atomic numbers Mn = 25, Fe = 26, Co = 27)
    • 56. Problem
      54
      Consider the following nuclear reactions : The number of neutrons in he element L is :
      142
      144
      140
      146
    • 57. Problem
      55
      The half-life of a radioisotope is four hours. If the initial mass of the isotope was 200 g. The mass remaining after 24 hours undecided is :
       
      1.042 g
      2.084 g
      3.125 g
      4.167 g
    • 58. Problem
      56
      The compound formed in the positive test for nitrogen with the Lasaigne solution of an organic compound is :
       
      Fe4[Fe(CN)6]3
      Na3[Fe(CN)6]
      Fe[Fe(CN)]3
      Na4[Fe(CN)6NOS]
    • 59. Problem
      57
      The ammonia evolved from the treatment of 0.30 g of an organic compound of the estimation of nitrogen was passed in 100 mL, of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium hydroxide solution of complete neutralization. The organic compound is :
       
      Acetamide
      Benzamide
      Urea
      Thiourea
    • 60. Problem
      58
      Which one of the following has the minimum boiling point ?
       
      n-butane
      1-butyne
      1-butene
      Isobutene
    • 61. Problem
      59
      The IUPAC name of the compound
       
      3,3-dimethyl-1-hydroxy cyclohexane
      1,1-dimethyl-3-hydroxy cyclohexane
      3,3-dimethyl-1-cyclohexanol
      1,1-dimethyl-3-cyclohexanol
    • 62. Problem
      60
      Which one of the following does not have sp2hybridised carbon ?
       
      Acetone
      Acetic acid
      Acetonitrile
      Acetamide
    • 63. Problem
      61
      Which of the following will have a meso-isomer also ?
       
      2-chlorobutane
      2,3-dichlorobutane
      2, 3-dichloropentane
      2- hydroxypropanoic acid
    • 64. Problem
      62
      Rate of the reaction
      Is fastest when Z is :
       
      Cl
      NH2
      OC2H5
      OCOCH3
    • 65. Problem
      63
      Amongst the following compounds, the optically active alkane having lowest molecular mass is :
    • 66. Problem
      64
      Consider the acidity of the carboxylic acids:
      PhCOOH
      o-NO2C6H4COOH
      p-NO2C6H4COOH
      m-NO2C6H4COOH
    • 67. Problem
      65
      which of the following is the strongest base ?
    • 68. Problem
      66
      Which base is present in RNA but not in DNA ?
       
      Uracil
      Cytosine
      Guanine
      Thymine
    • 69. Problem
      67
      The compound formed on heating chlorobenzene with chloral in the presence of concentrated sulphuric acid is :
       
      Gammexene
      DDT
      Freon
      Hexachloroethane
    • 70. Problem
      68
      On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is :
       
      CH3COOC2H5 + NaCl
      CH3COONa + C2H5OH
      CH3COCl + C2H5OH + NaOH
      CH3Cl + C2H5COONa
    • 71. Problem
      69
      Acetyl bromide reacts with excess of CH3MgI followed by treatment with a saturated solution of NH4Cl gives :
       
      Acetone
      Acetamide
      2-methyl-2-propanol
      Acetyl iodide
    • 72. Problem
      70
      Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon ?
       
      Ethyl acetate
      Acetic acid
      Acetamide
      Butan-2-one
    • 73. Problem
      71
      Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid ?
       
      Phenol
      Benzaldehyde
      Butananl
      Benzoic acid
    • 74. Problem
      72
      Among the following compounds which can be dehydrated very easily ?
    • 75. Problem
      73
      Which of the following compounds is not chiral ?
       
      1-chloropentane
      2-chloropentane
      1-chloro-2-methyl pentane
      3-chloro-2-mehtyl pentane
    • 76. Problem
      74
      Insulin production and its action in human body are responsible for the level of diabetes this compound belongs to which of the following categories ?
       
      A co-enzyme
      Ahormone
      An enzyme
      An antibiotic
    • 77. Problem
      75
      The smog is essentially caused by the presence of :
       
      O2 and O3
      O2 and N2
      Oxides of sulphur and nitrogen
      O3 and N2
    • 78. FOR SOLUTION VISIT WWW.VASISTA.NET

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