1000 Best General Science MCQ-Questions
Q145). In an atomic explosion, enormous energy is released which is due to
a).conversion of chemical energy into heat energy
b).conversion of mechanical energy into nuclear energy
c).conversion of mass into energy
d).conversion of neutrons into protons
Correct Answer:
conversion of mass into energy
Explanation:
Q146). Isotopes are separated by
a).crystallisation
b).sublimation
c).distillation
d).filtration
Correct Answer:
distillation
Explanation:
Q147). The wavelength of X-rays is of the order of
a).10 micron
b).1 angstrom
c).1 cm
d).1 m
Correct Answer:
1 angstrom
Explanation:
Q148). Mesons are found in
a).Laser beam
b).X-rays
c).Gamma rays
d).Cosmic rays
Correct Answer:
Cosmic rays
Explanation:
Q149). Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
a).Thorium
b).Radium
c).Plutonium
d).Radan
Correct Answer:
Thorium
Explanation:
Q150). Which of the following shows the masses of the three elementary particles in decreasing order?
a).Leptons, Baryons, Mesons
b).Mesons, Baryons, Leptons
c).Baryons, Mesons, Leptons
d).Leptons, Mesons Baryons
Correct Answer:
Baryons, Mesons, Leptons
Explanation:
Q151). What is the wavelength of visible spectrum?
a).8500 – 9800 angstrom
b).7800 – 8000 angstrom
c).3900 – 7600 angstrom
d).1300 – 3000 angstrom
Correct Answer:
3900 – 7600 angstrom
Explanation:
Q152). Which of the following has a least penetrating power?
a).All have same penetrating power
b).Beta Particles
c).Alpha particles
d).Gamma rays
Correct Answer:
Alpha particles
Explanation: