1281. The development of the ultra microscope makes use of the :
A. Edison Effect
B. Tyndall Effect *
C. Brownian motion
D. Zeeman Effect
1282. Which of the following bases is involved in the making of soap?
A. Baking soda
B. Caustic soda *
C. Ammonia
D. Washing soda
1283. What is the PH of water ?
A. 9
B. 8
C. 7 *
D. 6
1284. Glass is made of :
A. Sand and Silicate
B. Quartz and Mica *
C. Sand and Silt
D. None of these
1285. Which of the following is most elastic ?
A. Wet Clay
B. Steel *
C. Plastic
D. Rubber
1286. Which of the following is called strategic metal ?
A. Silicon
B. Titanium
C. Uranium *
D. Germanium
1287. Which of the among the following is the main ingredient in cement?
A. Limestone
B. Gypsum *
C. Clay
D. Ash
1288. Which one among the following is not a source of renewable energy ?
A. Fuel cell *
B. Solar energy
C. Hydroelectricity
D. Wind energy
1289. For sending sound waves at large distance which waves are used :
A. Infrared waves
B. Radio waves *
C. Light waves
D. X-waves
1290. The waves used for sending signals to the satellite from ground station are :
A. X-Rays
B. Sound waves
C. Micro waves *
D. Ultraviolet Rays