15. Which of the following has the least penetrating power?
(a) Alpha particles(b) Beta particles(c) Gamma rays(d) None of these
15. Which of the following has the least penetrating power? Read More »
14. Atom bomb is based on the principle of:
(a) Nuclear fusion(b) Nuclear fission(c) Both (a)and(b)(d) None of these
14. Atom bomb is based on the principle of: Read More »
13. Radioactive disintegration of uranium ultimately results in formation of:
(a) Radium(b) Thorium(c) Lead(d) Polonium
13. Radioactive disintegration of uranium ultimately results in formation of: Read More »
12. The isotope of uranium capable of sustaining chain reaction is:
(a) U-235(b) U-238(c) U-239(d) U-242
12. The isotope of uranium capable of sustaining chain reaction is: Read More »
11. Which of the following is used as a coolant in nuclear reactors?
(a) Chlorine(b) Liquid Sodium(c) Cadmium(d) Graphite
11. Which of the following is used as a coolant in nuclear reactors? Read More »
10. Atoms of an element differ from those of all other elements in:
(a) Atomic number and electronic configuration(b) Atomic number and number of valence electrons(c) Number of neutrons and electronic configuration(d) Number of neutrons and number of valence electrons
10. Atoms of an element differ from those of all other elements in: Read More »
9. Which of the following types of photons has the highest energy?
(a) Visible radiation(b) Radio waves(c) Gamma rays(d) X-rays
9. Which of the following types of photons has the highest energy? Read More »
8. In an atomic explosion, enormous energy is released which is due to the:
(a) Conversion of neutrons into protons(b) Conversion of mass into energy(c) Conversion of mechanical energy into nuclear energy(d) None of these
8. In an atomic explosion, enormous energy is released which is due to the: Read More »
7. Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in the building material?
(a) Thorium(b) Radium(c) Radon(d) Plutonium
6. What is the wavelength of visible spectrum?
(a) 1300 A⁰-3000 A⁰(b) 3900 A⁰-7600 A⁰(c) 7700 A⁰-7900 A⁰(d) 8400 A⁰-9700 A⁰
6. What is the wavelength of visible spectrum? Read More »