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IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
IIT JEE Chemistry  1985
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IIT JEE Chemistry 1985

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  • 1. IIT JEE - Past papers
    CHEMISTRY- UNSOLVED PAPER – I985
  • 2. SECTION – I
    Single Correct Answer Type
    This section contains 20 multiple choice questions. Each question has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct.
  • 3. 01
    Problem
    Bohr model can explain:
    The spectrum of hydrogen atom only
    Spectrum of an atom or ion containing one electron only
    The spectrum of hydrogen molecule
    The solar spectrum
  • 4. Problem
    02
    The molecule having one unpaired electron is:
    NO
    CO
    CN-
    d.
  • 5. Problem
    03
    An example of a reversible reaction is:
    a.
    b.
    c.
    d.
  • 6. Problem
    04
    Rate of diffusion of a gas is:
    Directly proportional to its density
    Directly proportional to its molecular weight
    Directly proportional to the square root of its molecular weight
    Inversely proportional to the square root of its molecular weight
  • 7. Problem
    05
    For a dilute solution, Raoult’s law states that:
    The lowering of vapour pressure is equal to the mole fraction of solute
    The relative lowering of vapour pressure is proportional to the amount of solute in solution
    The relative lowering of vapour pressure is proportional to the amount of solute in solution
    The vapour pressure of the solution is equal to the mole fraction of solvent
  • 8. Solution
    06
    The reaction occurs in the galvanic cell:
    Ag|AgCl|(s) |KCl (soln) |AgNO3 (soln) |Ag
    PtH2 (g) |HCl (soln) | (soln) |Ag
    PtH2 (g) |HCl (soln) |AgCl(s) |Ag
    PtH2 (g) |KCl (soln) |AgCl(s) |Ag
  • 9. Problem
    07
    The radius of an atomic nucleus is of the order of:
    cm
    10-13cm
    10-14cm
    10-8cm
  • 10. Problem
    08
    The best indicator for detection of end point in titration of a weak acid and a strong base is:
    Methyl orange (3 to 4)
    Methyl red (5 to 6)
    Bromothymol blue (6 to 7.5)
    Phenolphthalein (8 to 9.6)
    Note: Figures in the brackets show the pH range of the indicator
  • 11. Problem
    09
    Nitrogen dioxide cannot be obtained by heating:
    a.
    b.
    c.
    d.
  • 12. Problem
    10
    The oxide that gives hydrogen peroxide on treatment with a dilute acid is:
    a.
    b.
    c.
    d.
  • 13. Problem
    11
    The molecular formula of Gluer's salt is :
    a.
    b.
    c.
    d.
  • 14. Problem
    12
    A gas that cannot be collect over water is:
    a.
    b.
    c.
    d.
  • 15. Problem
    13
    The conjugate acid of NH is:
    a.
    b.
    c. NH
    d.
  • 16. Problem
    14
    Acidic hydrogen is present in:
    Ethyne
    Ethene
    Benzene
    Ethane
  • 17. Problem
    15
    The compound that will not give iodoform on treatment with alkali and iodine is:
    Acetone
    Ethanol
    Diethyl ketone
    Isopropyl alcohol
  • 18. Problem
    16
    Anti-Markownikoff addition of HBr is not observed in:
    Propene
    Butene
    But –2-ene
    Pent-2-ene
  • 19. Problem
    17
    The compound that is not a Lewis acid is:
    a.
    b.
    c.
    d. SnCl
  • 20. Problem
    18
    The compound that is most reactive towards electrophonic nitration is:
    Toluene
    Benzene
    Benzoic acid
    Nitrobenzene
  • 21. Problem
    19
    Hydrogen gas will not reduce:
    Heated cupric oxide
    Heated ferric oxide
    Heated stannic oxide
    Heated aluminum oxide
  • 22. Problem
    20
    Electromagnetic radiation with maximum wavelength is:
    Ultraviolet
    Radio wave
    X-ray
    Infrared
  • 23. SECTION – II
    • Give the reason in one or two sentences for each of the following.
  • 01
    Problem
    Anhydrous HCl is a bad conductor of electricity but aqueous HCl is a good conductor.
  • 24. Problem
    02
    .
    O-Nitrogen is steam volatile whereas p- nitro phenol is not.
  • 25. Problem
    03
    Formic acid is stronger acid than acetic acid.
  • 26. Problem
    04
    Graphite is used as a solid lubricant.
  • 27. Problem
    05
    Fluorine cannot be prepared from fluorides by chemical oxidation.
  • 28. SECTION – III
    Complete the following sentences
  • 29. 01
    Problem
    The rate of chemical change is directly proportional to _________.
  • 30. Problem
    02
    The terminal carbon atom in butane is ___________ hybridized.
    .
  • 31. Problem
    03
    On Milliken scale, the average of ionization potential and electron affinity is known as _____________.
  • 32. Problem
    04
    The number of neutrons in the parent nucleus which gives 14N on beta emission is __________.
  • 33. Problem
    05
    Sodium dissolved in liquid ammonia conducts electricity because_________.
  • 34. SECTION – IV
    True or false
    This question contains five statements, each of which is either true of false. Indicate your choice of the answer in the answer-book by writing TRUE or FALSE for each statement.
  • 35. 01
    Problem
    Kinetic energy of molecule is zero at C
  • 36. Problem
    02
    Carbon tetrachloride is inflammable.
  • 37. Problem
    03
    All molecules with polar bonds have dipole moment.
  • 38. Problem
    04
    A gas in a closed container will exerts much higher pressure due to gravity at the bottom than at the top.
  • 39. Problem
    05
    M-Chlorobromobenzene is an isomer of m-bromochlorobenzene.
  • 40. Problem
    06
    Iodide is a better nucleophile than bromide.
  • 41. Problem
    07
    ­ is nonlinear molecule.
  • 42. Problem
    08
    Heat capacity of a diatomic gas is higher than that of a monatomic gas.
  • 43. Problem
    09
    Addition of ammonium chloride to a solution containing ferric and magnesium ions is essential for selective precipitation of ferric hydroxide by aqueous ammonia
  • 44. Problem
    10
    Solubility of sodium hydroxide increases with increase in temperature.
  • 45. SECTION – V
    Arrange the following in order of their sentences
  • 46. 01
    Problem
    Decreasing ionic size
  • 47. Problem
    02
    Increasing acidic property ZnO, MgO
  • 48. Problem
    03
    Increasing first ionization potential Mg, Al, Si, Na
  • 49. Problem
    04
    Increasing reactivity towards HCN , HCHO, C2H5COCH3
  • 50. Problem
    05
    Increasing bond length
  • 51. SECTION – IV
    Match the following
  • 52. 01
    Problem
    Spinel
    Felspar
    Cerussite
    Malachite
    Kisserite
  • 53. Problem
    02
    Liquid air Deacon Process
    Parke process
    Nitric oxide Claude process
    Silver Ostwald process
    Chlorine Solvay process
  • 54. Problem
    03
    Phenol colored glass
    antichlor
    Salicylic acid refractory material
    Quick lime antiseptic
    CuO analgesic
  • 55. Problem
    04
    Aston radium
    Priestley radioactivity
    Ramsay oxygen
    Marie Curie inert gas
    Becquerel mass spectrum
  • 56. FOR SOLUTION VISIT WWW.VASISTA.NET

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