If a radioactive element emitted one α and one β-particle, then the mass number of the daughter element is:
1. decreased by 4
2. increased by 4
3. decreased by 2
4. increased by 2
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 |
If a deuteron is bombarded on a 8O16 nucleus then an α-particle is emitted. The product nucleus is:
1. 7N13
2. 5B10
3. 4Be9
4. 7N14
Which rays contain (+ve) charged particle:
1. α-rays
2. β-rays
3. γ-rays
4. X-rays
represent the mass of the neutron and proton respectively. An element having mass M has N neutrons and Z-protons, then the correct relation will be:
1.
2.
3.
4.
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 |
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 |
The volume occupied by an atom is greater than the volume of the nucleus by a factor of about:
1. \(10\)
2. \(10^5\)
3. \(10^{10}\)
4. \(10^{15}\)
Which of the following rays are not electromagnetic waves?
1. X-rays
2. γ-rays
3. β-rays
4. Heat rays