A. U-235
B. U-238
C. Th-232
D. None of these
Related Mcqs:
- 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 - A radioactive isotope undergoes decay with respect to time following _____________ law?
A. Logarithmic
B. Exponential
C. Linear
D. Inverse square - Which of the following accounts for the maximum energy release in the nuclear fission process ?
A. Kinetic energy of fission products
B. Radioactive decay of fission products
C. Instantaneous release of γ-rays
D. Kinetic energy of neutrons - 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 - 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 - The phenomenon of nuclear fission is opposite to that of__________________?
A. Radioactive decay
B. Thermionic emission
C. Nuclear fusion
D. Combustion - First experimental observation of nuclear fission was done by ____________________?
A. Plane
B. Rutherford
C. Fermi
D. Hahn and Strassmann - 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 - 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 - 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
