91 .The sweetest of all sugars-
A.  Glucose only
B.  glucose and galactose
C.  glucose and fructose
D.  glucose and lactose
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92 .Which one among the following substances is NOT a 'green house' gas?
A.  Water vapour
B.  Chlorofluorocarbon
C.  Methane
D.  Nitrogen
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93 .Muddy water is treated with alum in purification process, it is termed as.
A.  adsorption
B.  emulsification
C.  absorption
D.  coagulation
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94 .The photoelectric effect is described as the ejection of electrons from the surface of metal when-
A.  it is used
B.  it is placed in strong electrick field
C.  electrons of suitable velocity impinge on it
D.  Light of suitable wavelength falls on it
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95 .In the manufacture of safety matches, we use-
A.  White phosphorus
B.  Black phosphoorus
C.  Violet phosphorus
D.  Red phosphorus
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96 .Chemical name of Gammaxane is:
A.  Aniline
B.  Toulene
C.  Benzene hexachloride
D.  Chloro benzene
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97 .The word 'insolation' means
A.  Matters which insulates
B.  Incoming solar radiation
C.  Insoluble matters
D.  None of the above
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98 .Which electro magnetic radiation is emitted by radioactive substance-
A.  gama – rays
B.  Radio waves
C.  Micro waves
D.  x – ray
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99 .Hydrogen bomb is based on the principle of -
A.  nuclear fission
B.  nuclear fusion
C.  natural radioactivity
D.  artificial radioactivity
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100 .In the study of pollution, SPM refers to
A.  Sulphur Phosphorus Matter
B.  Sulphur Particlulate Matter
C.  Solid Particulate Matter
D.  Suspended Particulate Matter
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101 .Deficiency of which one of the following cause xerophthalmia-
A.  Vitamin B3
B.  Vitamin B12
C.  Vitamin A
D.  Vitamin C
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102 .Main pollutan present in automobile exhaust is-
A.  CO
B.  CO2
C.  NO
D.  hydrocarbons
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103 .The increasing amount of carbon dioxide in the air is slowly raising the temperature of atmosphere, because it absobs-
A.  The water vapours of the air and retains its heat
B.  The ultraviolet part of the solar radiation
C.  All the solar radiations
D.  The infrared part of the solar radiation
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104 .Aqua Regia contains
A.  3 parts of conc. HCI + 1 part of con. HNO3
B.  3 parts of conc. HCI + 1 part of con. H2SO4
C.  3 parts of conc. H2SO4 + 1 part of con. HNO3
D.  None of these
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105 .What was the fissionable material used in the bombs dropped at Nagasaki (Japan) in the years 1945?
A.  Sodium
B.  Potassium
C.  Plutonium
D.  Uranium
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