The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235, followed by nuclear fission is __________________?

Related Mcqs:

1. Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is_______________?

   A. 3
   B. 235
   C. 200
   D. 92

2. The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about ______________ metres/second?

   A. 1100
   B. 2200
   C. 3300
   D. 4400

3. Heavy water used in the nuclear reactors to slow down the speed of neutrons is __________________?

   A. Highly purified water
   B. A compound of oxygen and deuterium
   C. Water having dissolved salts of heavy metals
   D. None of these

4. Critical energy should be _______________ the neutron binding energy of the atom in order to initiate a nuclear fission?

   A. Equal to
   B. Less than
   C. More than
   D. Either more or less

5. Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around _____________ m/sec?

   A. 1
   B. 2200
   C. 3 × 1011
   D. 9 × 1021

6. Thermal neutrons which are used to cause the fission of U-235 have energy _____________ eV?

   A. < 0.025
   B. > 1
   C. 1-25
   D. > 200

7. Thorium-232 (a fertile material) on absorption of a neutron gets converted into ___________ , which is a fissile material?

   A. Thorium-233
   B. Uranium-235
   C. Uranium-233
   D. Plutonium-239

8. Primary purpose of a ____________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014neutrons/cm2 second?

   A. Research
   B. Power
   C. Breeder
   D. Homogeneous

9. First experimental observation of nuclear fission was done by ____________________?

   A. Plane
   B. Rutherford
   C. Fermi
   D. Hahn and Strassmann

10. The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is_____________________?

    A. Less
    B. More
    C. Same
    D. Much more