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Azimuthal quantum number describes
(a) orbital size (b) orbital orientation
(c) orbital shape (d) nuclear stability

52. The radioactive rays having highest penetrating power is
    (a) rays (b)  rays (c) rays
    (d) all have equal penetrating power
53. Which of the following has an electrovalent linkage?
    (a) MgCl2 (b) CH4 (c) SiCl4 (d) CCl4
54. The element having highest value of electronegativity is
    (a) chlorine (b) fluorine (c) bromine (d) iodine
55. Oxidation number of chromium in Cr2O7
    2-
    is
    (a) + 6 (b) + 5 (c) + 4 (d) + 3
    B.Sc. CSIT Entrance Examination Model Question 4
56. Which of the following is an amphoteric oxide?
    (a) CaO (b) MgO (c)CuO (d) ZnO
57. The structure of Buckminister fullerene contains
    (a) 20 six member rings and 12 five member rings
    (b) 12 six member rings and 20 five member rings
    (c) 12 six member rings and 10 five member rings
    (d) 12 six member rings and 8 five member rings
58. Down’s process is used for the extraction of
    (a) ammonia (b) nitric acid (c) sodium (d) sulphuric acid
59. The IUPAC name of iso-butane is
    (a) 2-methylpropane (b) 2,2-dimethylpropane
    (c) 2-methylpropene (d)2-methylbutane
60. An alkaline KMnO4 solution is known as
    (a) Tollen’s reagent (b) Baeyer’s reagent
    (c) Fehling’s reagent (d) Grignard reagent
61. When haloalkane solution is treated with metallic sodium in presence of
    dry ether, respective alkane is obtained. This reaction is known as
    (a) Wurtz reaction (b) Wolf-Kishner reduction
    (c) Cannizzaro’s reaction (d) Reimer-Tiemann reaction
62. The general formula of alkanes is
    (a) CnH2n (b)CnH2n+2 (c)CnH2n-2 (d)None of the above
63. Detection of nitrogen, sulphur and halogens in organic compounds is
    done by
    (a) Lassaigne’s test (b) Lucas test
    (c) Victor meyer test (d) carbylamine test
64. The structure of methane is
    (a) trigonal planar (b) linear (c) tetrahedral (d) square planar
65. Equivalent weight of potassium dichromate in an acidic medium is equal
    to its
    (a) mol. wt./6 (b) mol. wt./3 (c)mol. wt./4 (d) mol. wt./2
66. An example of Lewis base is
    (a) BF3 (b) AlCl3 (c) FeCl3 (d)NH3
67. A device which can generate electricity by means of a redox reaction is
    called
    (a) electrochemical cell (b) galvanic cell
    (c) voltaic cell (d)all of the above
68. 1calorie is equal to
    (a) 4.184 joules (b) 5.184 joules
    (c) 3.184 joules (d) 2.184 joules
69. The rate of a reaction depends on
    (a) concentration of reacting species (b) temperature
    (c) surface area of the reactants (d) all of the above
70. Each carbon atom of benzene is
    (a) sp3 hybridized (b) sp2 hybridized
    (c) sp hybridized (d) sp3d hybridized
71. Which is correct for the reaction of Lucas reagent with
    tertiary alcohol?
    (a) no turbidity occurs at room temperature
    (b) turbidity appears within five minutes
    (c) turbidity appears immediately
    (d) turbidity appears within ten minutes
72. Fat is a
    (a) lipid (b) carbohydrate (c) protein (d) amino acid
73. Bakelite is made by the action of
    (a) phenol on formaldehyde (b) urea on formaldehyde
    (c) melamine on formaldehyde
    (d) ethylene glycol on phthalic acid
74. Which of the following compound is called corrosive sublimate?
    (a) Hg2Cl2 (b) HgCl2 (c) K2HgI4HgI2
75. Haematite is an ore of
    (a) iron(b) copper (c) mercury (d) silver