Nuclear Stability

Q. Statement I: Neutron to proton ratio less than 1 especially in a heavy nucleus makes it highly unstable.
Statement II: Nucleus where protons are separated by a large distance are dominated by repulsive electrostatic force.

1. Statement I is not always true but II is correct.
2. Both statements are false
3. Statement I is false but II is true.
4. Both statements are always true and statement II is the correct reason for statement I

Q. Pick the correct option given the following statements:
Statement I Nuclide ${}_{13}^{30}Al$ is less stable than ${}_{20}^{40}Ca$
Statement II Nuclides having odd number of protons and neutrons are generally unstable.

1. Statement I is true; Statement II is true; Statement II is the correct explanation of Statement I
2. Statement I is true; Statement II is true; Statement II is not the correct explanation of Statement I
3. Statement I is true; Statement II is false
4. Statement I is false; Statement II is true

Q.

Based on magic numbers, which nuclide is the most stable ?

1. $N{i}^{59}$

2. $V^{51}$

3. $C^{12}$

4. $O^{16}$

Q.

${13}^{A{l}^{27}}$ is a stable isotope. ${13}^{A{l}^{29}}$ is expected to disintegrate by :

1. $\alpha -$ emission

2. $\beta -$ emission

3. Position emission

4. Proton emission

Q. Which of the following atomic mass of uranium is the most radioactive

1. 238
2. 235
3. 226
4. 248

Q. Pick the correct option given the following statements:
Statement I Nuclide ${}_{13}^{30}Al$ is less stable than ${}_{20}^{40}Ca$
Statement II Nuclides having odd number of protons and neutrons are generally unstable.

1. Statement I is true; Statement II is true; Statement II is the correct explanation of Statement I
2. Statement I is true; Statement II is true; Statement II is not the correct explanation of Statement I
3. Statement I is true; Statement II is false
4. Statement I is false; Statement II is true

Q. Which can be used for carrying out nuclear reaction

1. Thorium – 232
2. Uranium – 238
3. Plutonium – 239
4. Neptunium – 239

Q.

${13}^{A{l}^{27}}$ is a stable isotope. ${13}^{A{l}^{29}}$ is expected to disintegrate by :

1. $\alpha -$ emission

2. $\beta -$ emission

3. Position emission

4. Proton emission

Q. Which of the following facts are inferred from the given N vs Z graph?

1. For lighter stable nuclei $\frac{N}{Z}=1$
2. For lighter stable nuclei $\frac{N}{Z}$ > 1
3. For heavier stable nuclei $\frac{N}{Z}=1$
4. For heavier stable nuclei $\frac{N}{Z}$ > 1

Q.

Which of the following nuclides is positron emitter ?

1. $H^3$

2. $H^{e^6}$

3. $B^{12}$

4. $N^{13}$

Q.

Based on magic numbers, which nuclide is the most stable ?

1. $N{i}^{59}$

2. $V^{51}$

3. $C^{12}$

4. $O^{16}$