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General Science - Questions and Answers

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211. Who invented X-ray ?
A. Rutherford
B. Roentgen
C. Einstein
D. Baird
Explanation:
212. A cut diamond sparkles due to
A. its very low refractive index
B. total internal refraction
C. its high refractive index and high value of the critical angle
D. its high refractive index and small value of the critical angle
Explanation:
213. Which of the following ores does not contain iron ?
A. Haematite
B. Magnetite
C. Limonite
D. Cassiterite
Explanation:
214. A vehicle moving on a circular path experiences
A. inertia
B. centripetal force
C. gravitational pull of the earth
D. None of these
Explanation:
215. Under similar conditions of pressure and temperature, the density of humid air is
A. less than that of dry air
B. more than that of dry air
C. equal to that of dry air
D. more than or less than that of dry air depending on temperature
Explanation:
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