Consider the following statements:
(I) | All isotopes of elements have the same number of neutrons. |
(II) | Only one isotope of an element can be stable and non-radioactive. |
(III) | All elements have isotopes. |
(IV) | All isotopes of carbon can form chemical compounds with oxygen\(\text-16\). |
The correct option regarding an isotope is:
1. | (III) and (IV) only |
2. | (II), (III), and (IV) only |
3. | (I), (II), and (III) only |
4. | (I), (III), and (IV) only |
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 |
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.
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
Two nuclei fuse together to form a single nucleus as . If binding energy per nucleon of A and B are respectively x and y, then the energy released in the process is:
1. | 4x + 4y | 2. | 4x - 4y |
3. | 4y - 4x | 4. | y - x |
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. |