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Q. No.For the fission reaction
\({ }_0^1 \mathrm{n}+{ }_{92}^{235} \mathrm{U} \rightarrow{ }_{92}^{236} \mathrm{U} \rightarrow{ }_{56}^{144} \mathrm{Ba}+{ }_{36}^{89} \mathrm{Kr}+\mathrm { neutrons }\)
the number of neutrons produced is:
1. \(1\)
2. \(2\)
3. \(3\)
4. \(4\)
Subtopic: Nuclear Energy |
87%
From NCERT
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\(^{238}_{92}\mathrm{U}\) converts into \(^{206}_{82}\mathrm{Pb}\) by radio active decay process. How many \(\alpha\)-particles and \(\beta\)-particles may be emitted in the process?
| 1. | \(8\alpha~\text{and}~8\beta\) | 2. | \(5\alpha~\text{and}~12\beta\) |
| 3. | \(8\alpha~\text{and}~6\beta\) | 4. | \(6\alpha~\text{and}~8\beta\) |
Subtopic: Types of Decay |
81%
From NCERT
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In a nuclear reaction, \(2~\text{amu}\) of mass is converted into energy. According to Einstein's mass-energy relationship, the energy released is:
| 1. | \(1863~\text{J}\) | 2. | \(931.5~\text{MeV}\) |
| 3. | \(1863~\text{MeV}\) | 4. | \(931.5~\text{J}\) |
Subtopic: Mass-Energy Equivalent |
83%
From NCERT
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Nucleus \(A\) is having mass number \(220\) and its binding energy per nucleon is \(5.6~\text{MeV}.\) It split into two fragments \(B\) and \(C\) of mass numbers \(105\) and \(115.\) The binding energy of nucleons in \(B\) and \(C\) is \(6.4~\text{MeV}\) per nucleon. The energy \(Q\) released per fission will be:
1. \(0.8~\text{MeV}\)
2. \(275~\text{MeV}\)
3. \(220~\text{MeV}\)
4. \(176~\text{MeV}\)
1. \(0.8~\text{MeV}\)
2. \(275~\text{MeV}\)
3. \(220~\text{MeV}\)
4. \(176~\text{MeV}\)
Subtopic: Nuclear Binding Energy |
83%
From NCERT
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How does the binding energy per nucleon vary with the increase in the number of nucleons?
| 1. | decrease continuously with mass number. |
| 2. | first decreases and then increases with an increase in mass number. |
| 3. | first increases and then decreases with an increase in mass number. |
| 4. | increases continuously with mass number. |
Subtopic: Nuclear Binding Energy |
82%
From NCERT
NEET - 2013
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If \(M\) be the mass of the nucleus and \(m\) be the sum of the individual masses of the nucleons forming the nucleus, then:
| 1. | \(M\) is slightly more than \(m\) |
| 2. | \(M\) is slightly less than \(m\) |
| 3. | \(M=m\) |
| 4. | \(M\) may be less or more than m depending upon the nature of the nucleus |
Subtopic: Nuclear Binding Energy |
77%
From NCERT
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In nuclear fission, \(0.1\%\) of the mass is converted into energy. How much electrical energy can be generated by the fission of \(1~\text{kg}\) of fuel?
1. \(1~\text{kWh}\)
2. \(10^{7}~\text{kWh}\)
3. \(2.5~\text{kWh}\)
4. \(2.5 \times 10^{7}~\text{kWh}\)
1. \(1~\text{kWh}\)
2. \(10^{7}~\text{kWh}\)
3. \(2.5~\text{kWh}\)
4. \(2.5 \times 10^{7}~\text{kWh}\)
Subtopic: Nuclear Energy |
74%
From NCERT
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\(\alpha \text-\)particles, \(\beta \text-\)particles and \(\gamma \text-\)rays, each have an energy of \(10~\text{MeV}.\) The increasing order of penetrating powers of the radiations will be:
1. \(\beta>~\alpha>~\gamma\)
2. \(\alpha<~\beta<~\gamma\)
3. \(\gamma=\beta<~\alpha\)
4. \(\alpha<~\beta=\gamma\)
1. \(\beta>~\alpha>~\gamma\)
2. \(\alpha<~\beta<~\gamma\)
3. \(\gamma=\beta<~\alpha\)
4. \(\alpha<~\beta=\gamma\)
Subtopic: Types of Decay |
89%
From NCERT
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Given below are two statements:
| Assertion (A): | In \(\alpha \text-\text{decay}\) atomic number of the daughter nucleus is reduced by \(2\) units from the parent nucleus. |
| Reason (R): | An \(\alpha \text-\text{particle}\) carries four units of mass. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Types of Decay |
80%
From NCERT
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A nucleus of mass number \(189\) splits into two nuclei having mass numbers \(125\) and \(64.\) The ratio of the radius of two daughter nuclei respectively is:
1. \(25:16\)
2. \(1:1\)
3. \(4:5\)
4. \(5:4\)
1. \(25:16\)
2. \(1:1\)
3. \(4:5\)
4. \(5:4\)
Subtopic: Nucleus |
83%
From NCERT
NEET - 2022
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