Determine the energy released in the process:
Given: M = 2.01471 amu
M= 4.00388 amu
1. 3.79 MeV
2.13.79 MeV
3. 0.79 MeV
4. 23.79 MeV
When nuclei are bombarded by protons, and the resultant nuclei are , the emitted particles will be:
1. | Neutrons | 2. | Alpha particles |
3. | Beta particles | 4. | Gamma photons |
If ratio in a nucleus is smaller than the required value for stability, then:
1. | It may emit α -particle. |
2. | It may emit β + particle. |
3. | It may go for K capture. |
4. | All of the above are possible. |
What is the respective number of and -particles emitted in the following radioactive decay?
\(X^{200}_{90}\rightarrow Y^{168}_{80}\)
1. | 6 and 8 | 2. | 6 and 6 |
3. | 8 and 8 | 4. | 8 and 6 |
If a proton and anti-proton come close to each other and annihilate, how much energy will be released?
1. | \(1.5 \times10^{-10}~\text{J}\) | 2. | \(3 \times10^{-10}~\text{J}\) |
3. | \(4.5 \times10^{-10}~\text{J}\) | 4. | None of these |
Fusion reaction takes place at a higher temperature because:
1. | atoms get ionized at high temperatures. |
2. | kinetic energy is high enough to overcome the Coulomb repulsion between nuclei. |
3. | molecules break up at a high temperature. |
4. | nuclei break up at a high temperature. |
Which of the following pairs of nuclei are isotones?
1.
2.
3.
4.
If in nuclear reactor using U235 as fuel, the power output is 4.8 MW, the number of fissions per second is:
(Energy released per fission of U235 = 200 MeV watts, 1 eV = 1.6 X 10–19 J)
1. 1.5×1017
2. 3×1019
3. 1.5×1025
4. 3×1025
=Calculate the Q-value of the nuclear reaction:
\(2~{ }_{6}^{12} \mathrm{C}\rightarrow{ }_{10}^{20} \mathrm{Ne}+{ }_2^4 \mathrm{He}\)
The following data are given:
\(m({ }_{6}^{12} \mathrm{C})=12.000000~\text{u}\)
\(m({ }_{10}^{20} \mathrm{Ne})=19.992439~\text{u}\)
\(m({ }_{2}^{4} \mathrm{He})=4.002603~\text{u}\)
1. \(3.16~\text{MeV}\)
2. \(5.25~\text{MeV}\)
3. \(3.91~\text{MeV}\)
4. \(4.65~\text{MeV}\)