61. What is the most common element in the universe?
A. Iron
B. Oxygen
C. Helium
D. Hydrogen
62. Who was the father of chemistry?
A. Robert Boyle
B. Cavendish
C. Lister
D. Urey
63. Which one of the following is a protein fibre?
A. Nylon
B. Silk
C. Polyester
D. Cotton
64. Broken glass that is used in the manufacture of glass is called
A. Cullet
B. Waste glass
C. Raw material
D. Batch
65. Camphor can easily be purified by the process of
A. Sublimation
B. Distillation
C. Crystallization
D. Sedimentation
66. The National Chemical Laboratory(India) is located in
A. Mumbai
B. Bengaluru
C. Hyderabad
D. Pune
67. Which one of the following contains maximum percentage of nitrogen by mass?
A. Urea
B. Ammonium cyanide
C. Ammonium carbonate
D. Ammonium nitrate
68. Quick silver is another name for
A. Silver
B. Mercury
C. Aluminium
D. Copper
69. Which one of the following is correct ? Butter is
A. A super cooled oil
B. an emulsion
C. a molecular solid
D. none of these
70. Which one of the following is an element ?
A. Topaz
B. Diamond
C. Ruby
D. Sapphire
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