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  • 1. AFMC–Past papers
    CHEMISTRY - UNSOLVED PAPER - 1997
  • 2. SECTION – I (Total Marks :50)
    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
    Orlon is polymer of
    Acrylonitrile
    Strene
    Tetrafluoroethylene
    Vinyl chloride
  • 4. Problem
    02
    Marsh gas contains
    H2S
    C2H2
    CO
    CH4
  • 5. Problem
    03
    Which of the following is true for diamond?
    Diamond is a bad conductor of heat
    Diamond is a good conductor of electricity
    Diamond is made up of C,H and O
    Diamond is soft
  • 6. Problem
    04
    In the commercial gasolines the type of hydrocarbons which are more desirable is
    Linear unsaturated hydrocarbon
    Branched hydrocarbon
    Toluene
    Straight-chain hydrocarbon
  • 7. Problem
    05
    Which lanthanide is most commonly used?
    Thorium
    Lanthanum
    Cerium
    Nobelium
  • 8. Problem
    06
    Electronic formula of chromium is
    3d44s1
    3d64s1
    3d44s2
    3d54s1
  • 9. Problem
    07
    Which of the following reacts with chloroform and a base to form phenylisocyanide?
    Benzene
    Aniline
    Nitrobenzene
    Phenol
  • 10. Problem
    08
    Acetamide reacts with P2O2 (Phosphorus pentoxide) to give
    Ethyl cyanide
    Methyl cyanide
    Ethyl isocyanate
    Methyl cyanate
  • 11. Problem
    09
    C12H22O11+H2O C6H12O6(aq)+C6H12O6(aq)
    Sucrose fructose glucose
    In the above reaction dilute H2SO4 is
    Heterogeneous catalyst
    Homogeneous catalyst
    Does not effect the reaction
    None of these
  • 12. Problem
    10
    If Ksp for HgSO4 is 6.4 x10-5, then solubility of the salt is
    6.4 x 10-5
    8 x 10-3
    6.4 x 10-3
    8 x 10-6
  • 13. Problem
    11
    Which of the following can be used for dating fossil?
    157N
    146C
    4020Ca
    126C
  • 14. Problem
    12
    Which of the following is not efflorescent?
    NaOH
    Cu SO4
    MgSO4
    Hydrated Cu SO4
  • 15. Problem
    13
    How much quick lime can be obtained from 25g?
    56g
    14g
    60g
    28g
  • 16. Problem
    14
    Cyanide and isoyanide are isomers of type
    Tautomer
    Positional
    Structural
    Functional
  • 17. Problem
    15
    Which of the following is heavy water?
    H20
    H2018
    D20
    H2O16
  • 18. Problem
    16
    The test of ozone O3 can be done by
    Au
    Ag
    Cu
    Hg
  • 19. Problem
    17
    Which of the following gases has electronic configuration 1s22s22p1x2p1y2p1z?
    Hydrogen
    Oxygen
    Fluorine
    Nitrogen
  • 20. Problem
    18
    Which of the following statement is correct?
    Hydrogen will not be liberated at anode
    Hydrogen has oxidation number -1 and +1
    Hydrogen has same Ionization potential as alkali metals
    Hydrogen has same electro negativity as halogens
  • 21. Problem
    19
    Which of the following is the largest stable atom?
    U
    Bi
    Pb
    A1
  • 22. Problem
    20
    Which of the following has square planar structure?
    [Ni(CN)4]2-
    NiC14]2-
    [Cr(CN)6]3-
    [Ni(CO)4]
  • 23. Problem
    21
    Which of the following is paramagnetic?
    [Ni(CN)4]2-
    [Ni(CO)4]
    NiC14]2-
    [Co(NH3)6]3+
  • 24. Problem
    22
    Which statement is not correct about alcohol?
    Alcohol of less no. of carbon atoms is less soluble in water than alcohol of high no of carbon atoms
    Alcohol is lighter than water
    Alcohol evaporates quickly
    All of these
  • 25. Problem
    23
    Which of the following is a simple ether?
    C6H,OCH3
    CH3OCH3
    C6H5OC2H5
    C2H5OCH3
  • 26. Problem
    24
    Arrange the following in increasing order of basicity
    CH3NH„ (CH3)2NH, C6H5NH2, (CH3).N
    C6H5NH2 < (CH3)3N < CH3NH2 < (CH3)2NH
    Reverse of (a)
    (ch3)3n < (ch3)2nh < ch3nh2 < c6h5nh2
    Reverse of (c)
  • 27. Problem
    25
    Arrange the following in increasing order of acidity H3P04, H2C03 HC1, Hi
    H2C03, H3P04, HC1, HI
    H2P04, HC1, H2C03, HI
    HC1, HI, H2C03, H3P04
    H3P04, H2C03HC1, HI
  • 28. Problem
    26
    Which of the following atomic mass of uranium is the most radio-active ?
    226
    238
    248
    235
  • 29. Problem
    27
    Which of the following is the IUPAC name of the compound?
    Image*
    4-methyl-2-hexanol
    4-methyl-3-hexanol
    2-methyl-3-hexanol
    3-methyl-4-hexanol
  • 30. Problem
    28
    If electron falls from n = 3 to n = 2, then emitted energy is
    1.9 eV
    10-2eV
    0-65 eV
    12-09 eV.
  • 31. Problem
    29
    Arrange the elements - Na, Rb, K, Mg in increasing order of atomic radius
    Na < Mg < K < Rb
    Mg < Na < K < Rb
    Rb < K < Mg < Na
    K < Na < Mg < Rb.
  • 32. Problem
    30
    Which of the following cannot be formed ?
    He
    He2+
    He
    He+.
  • 33. Problem
    31
    Number of protons, neutrons and electrons in the element 89y231 is
    89, 142, 89
    89, 231, 89
    89, 71, 89
    89, 89, 242
  • 34. Problem
    32
    The position is
    1H1
    -1e0
    0n1
    +1e0
  • 35. Problem
    33
    When oxalic acid is dehydrated by conc. H2SO4, then it forms
    CO2
    C+CO2
    CO + CO2
    CO
  • 36. Problem
    34
    What is the value of decay constant of a compound having half-life time, (T)1/2=2.95 days?
    2.7 x 10-6s-1
    2.7 x 10-5s-1
    3.105s-1
    2.7 x 106s-1
  • 37. Problem
    35
    Which of the following has the highest weight ?
    normal adult man
    10 litres of Hg
    all have same weight.
    1 m3 water
  • 38. Problem
    36
    Volume occupied by 4. 4 grams of C02 is
    224 litres
    2.24 litres
    22.4 x 102litres
    22.4 litres
  • 39. Problem
    37
     First law of thermodynamics is represented by the Equation
    W = Q +∆E
    &E = Q + W
    Q = W -∆E
    ∆E = Q - W.
  • 40. Problem
    38
    Which of the following is correct relationship ?
    ∆G = ∆H - T∆S
    ∆G =∆H + T∆S
    ∆G + ∆H = T∆S
    ∆H =∆G - T∆S.
  • 41. Problem
    39
    Number of isomers of C4H10 is
    4
    Isomerism not exist
    3
    2
  • 42. Problem
    40
    In Friedal - Craft's alkylation, besides A1C13 the other reactants are
    C6H6 + NH2
    C6H6 + CH3Cl
    C6H6+ CH3COC1
    C6H6 + CH4.
  • 43. Problem
    41
    Which of the following is a mixed ketone ?
    benzophenone
    3-pentanone
    butanone
    acetophenone
  • 44. Problem
    42
    Iodoethane reacts with sodium in the presence of dry ether. The product is
    Butane
    Pentane
    Butane
    Propane
  • 45. Problem
    43
    BF3 is acid according to
    Bronzed & Lowry
    Arrhenius
    Lewis
    All of these
  • 46. Problem
    44
    A base dissolved in water yields a solution with a hydroxide ion concentration of 0-05 mol litre~ . The solution is
    Neutral
    Basic
    Acid
    Both (b) and (c)
  • 47. Problem
    45
    Azeotropic mixture of HC1 and H20 has
    36% HC1
    48% HC1
    20.2%HC1
    22.2%HC1
  • 48. Problem
    46
    In which of the following case Kp is less than kc?
    2SO2+O2=2SO3
    PC15=PC13+C12
    H2+C12=2HC1
    All of these
  • 49. Problem
    47
    If concentration of reactants is increased by x then the K becomes
    K+x
    In K/x
    K
    K/x
  • 50. Problem
    48
    Which of the following is ferroelectric compound/
    Pb2O3
    BaTiO3
    PbZrO3
    K4[Fe(CN)6]
  • 51. Problem
    49
    Which of the following shows geometrical isomerism?
    Propene
    1-bithene
    1, 1-dichlorobutane
    2-butene
  • 52. Problem
    50
    Aromatic hydrocarbon shows mostly
    substitution electrophilic reactions
    addition electrophilic reactions
    substitution nucleophilic reactions
    addition nucleophilic reactions
  • 53. For solution visit www.vasista.net