When a uranium isotope \(_{92}^{235}\mathrm{U}\) is bombarded with a neutron, it generates \(_{36}^{89}\mathrm{Kr}\) three neutrons and:
1. | \(_{40}^{91}\mathrm{Zr}\) | 2. | \(_{36}^{101}\mathrm{Kr}\) |
3. | \(_{36}^{103}\mathrm{Kr}\) | 4. | \(_{56}^{144}\mathrm{Ba}\) |
1. | atoms get ionized at high temperature |
2. | kinetic energy is high enough to overcome the Coulomb repulsion between nuclei |
3. | molecules break up at high temperature |
4. | nuclei break up at high temperature |
In any fission process the ratio
1. Greater than 1
2. Depends on the mass of the parent nucleus
3. Equal to 1
4. Less than 1
Fission of nuclei is possible because the binding energy per nucleon in them:
1. | decreases with the mass number at low mass numbers |
2. | increases with the mass number at low mass numbers |
3. | decreases with the mass number at high mass numbers |
4. | increases with the mass number at high mass numbers |
Solar energy is mainly caused due to:
1. | burning of hydrogen in the oxygen |
2. | fission of uranium present in the sun |
3. | fusion of protons during synthesis of heavier elements |
4. | gravitational contraction |
Which of the following are suitable for the fusion process?
1. | light nuclei |
2. | heavy nuclei |
3. | the element must be lying in the middle of the periodic table |
4. | middle elements which are lying on the binding energy curve |
The energy released in nuclear fission is due to:
1. | some mass is converted into energy |
2. | the total binding energy of fragments is more than the B.E. of the parental element |
3. | total B.E. of fragments is less than the B.E. of parental element |
4. | total B.E. of fragments is equal to the B.E. of parental element |
Nuclear – fission is best explained by:
1. Liquid droplet theory
2. Yukawa - meson theory
3. Independent particle model of the nucleus
4. Proton-proton cycle
For the nuclear reaction:
The blank space can be filled by:
1.
2.
3.
4.