GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 026

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 026

251). In the nucleus of uranium -235, there are
A). 235 protons
B). 235 neutrons
C). 235 electrons
D). a total of 235 protons and neutrons

Answer: a total of 235 protons and neutrons

   
252). Phenomenon of spontaneous disintegration of a heavy nucleus is termed
A). radioactivity
B). fission
C). fusion
D). implosion

Answer: radioactivity


   
253). Radioactivity has applications in
A). medicine
B). agriculture
C). industry
D). all these

Answer: all these

   
254). Which of the following waves/rays are produced during radioactive nuclear changes?
A). infrared rays
B). light waves
C). X-rays
D). y-rays

Answer: y-rays


   
255). Gamma radiations are used for
A). sterilizing foodstuff
B). controlling pests
C). cancer therapy
D). all these

Answer: all these


256). Radio isotopes are
A). isotopes that are radioactive
B). some nuclei which emit radio waves
C). isotopes used in radio sets
D). none of these

Answer: isotopes that are radioactive


   
257). The two isotopes of uranium U-235 and U-238 have an/a
A). equal number of protons
B). equal number of neutrons
C). different number of electrons
D). equal number of neutrons and protons

Answer: equal number of protons


   
258). Radiocarbon dating technique is used to estimate the age of
A). rocks
B). soil
C). fossils
D). buildings

Answer: fossils


   
259). The age of the earth can be estimated by
A). uranium dating
B). carbon dating
C). atomic clocks
D). biological clocks

Answer: uranium dating

   
260). The process of the splitting up of a heavy nucleus into roughly two equal fragments with the emission of energy is called
A). transmutation
B). fission
C). fusion
D). implosion

Answer: fission