1. | do not change for any type of radioactivity |
2. | change for \(\alpha\) and \(\beta\text-\)radioactivity but not for \(\gamma\text-\)radioactivity |
3. | change for \(\alpha\text-\)radioactivity but not for others |
4. | change for \(\beta\text-\)radioactivity but not for others |
1. | triton energy is less than that of a \(\mathrm{He}^{3}\) nucleus. |
2. | the electron created in the beta decay process cannot remain in the nucleus. |
3. | both the neutrons in Triton have to decay simultaneously resulting in a nucleus with \(3\) protons, which is not a \(\mathrm{He}^{3}\) nucleus. |
4. | free neutrons decay due to external perturbations which is absent in Triton nucleus. |
1. | \(M = m_{\text{proton}}+ m_{\text{electron}}.\) |
2. | \(M = m_{\text{proton}}+ m_{\text{electron}}-\frac{B}{c^2}\left(B= 13.6~\text{eV}\right)\). |
3. | \(M\) is not related to the mass of the hydrogen atom. |
4. | \(M = m_{\text{proton}}+ m_{\text{electron}}-\frac{|V|}{c^2}(|V|=\) magnitude of the potential energy of electron in the \(H\text-\)atom). |
1. | \( m_3=\left|m_1-m_2 \right|\) | 2. | \( m_3<\left ( m_1+m_2 \right ) \) |
3. | \( m_3>\left ( m_1+m_2 \right ) \) | 4. | \( m_3=\left ( m_1+m_2 \right ) \) |
1. | \(Z\) protons and \(A-Z\) neutrons |
2. | \(Z\) protons and \(A\) neutrons |
3. | \(A\) protons and \(Z-A\) neutrons |
4. | \(Z\) neutrons and \(A-Z\) protons |
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. \(10^{15}\)
The energy required in \(\text{MeV/c}^2 \) to separate \({ }_8^{16} \mathrm{O}\) into its constituents is:
(Given: mass defect for \({ }_8^{16} \mathrm{O}=0.13691~ \text{amu}\))
1. | \(127.5\) | 2. | \(120.0\) |
3. | \(222.0\) | 4. | \(119.0\) |
The energy equivalent of \(0.5\) g of a substance is:
1. \(4.5\times10^{13}\) J
2. \(1.5\times10^{13}\) J
3. \(0.5\times10^{13}\) J
4. \(4.5\times10^{16}\) J