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General Knowledge on General Science | GK Test on General Science Page 28
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General Science

General Knowledge on General Science

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271. Nuclear fission is caused by the impact of
272. Which among the following is a positively charged particle emitted by a radioactive element?
273. Which of the following rays are more penetrating?
274. Mesons are found in
275. Which of the following is used as a moderator in nuclear reactor?
276. Which of the following has a least penetrating power?
277. The wavelength of X-rays is of the order of
278. Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
279. The isotope of uranium capable of sustaining chain reaction is
280. The dark lines in the solar spectrum are due to
  • A. absorption of corresponding wavelengths by the outer layers of the sun
  • B. destructive interference between waves of certain definite wavelengths
  • C. absorption of corresponding wavelengths by the prism used in the photograph
  • D. absence of corresponding wavelengths from the light emitted by the core of the sun
  • Check Answer | Discussion

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