A. 9
B. 6
C. 7
D. 8
52. Glass is made of .?
A. Sand & silicate
B. Quarts & Mica
C. Sand & Silt
D. None of these
53. Which of the following is called strategic metal.?
A. Silicon
B. Titanium
C. Uranium
D. Germanium
54. Which of the following is most elastic.?
A. Wet clay
B. Steel
C. Plastic tuber
D. None of above
55. Which one among the following is the amine ingredient in cement.?
A. Lime stone
B. Gypsum
C. Clay
D. Ash
56. Which one among the following is not a source of renewable energy.?
A. Fuel cell
B. Sorel energy
C. Hydroelectricity
D. Wind energy
57. For sending sound waves at large distance, which waves are used .?
A. Infrared waves
B. Radio waves
C. Light waves
D. X-waves
58. The waves used for sending signals to the satellite from ground station are.?
A. X-rays
B. Sound wafers
C. Micro waves
D. Ultraviolet rays
59. A mobile phone sends are receives massages through.?
A. Sound waves
B. Micro waves
C. Ultraviolet waves
D. Radio waves
60. Dry ice is.?
A. Liquid nitrogen
B. Water ice
C. Solid carbon dioxide
D. Frozen ethane
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