In the given nuclear reaction, the element \(\mathrm{X}\) is:
\({ }_{11}^{22} \mathrm{Na} \rightarrow \mathrm{X}+\mathrm{e}^{+}+\nu\)
1. \({ }_{12}^{22} \mathrm{Mg}\)
2. \({ }_{11}^{23} \mathrm{Na}\)
3. \({ }_{10}^{23} \mathrm{Ne}\)
4. \(_{10}^{22}\textrm{Ne}\)
Subtopic:  Types of Decay |
 63%
From NCERT
NEET - 2022
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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. \(5:4\)
Subtopic:  Nucleus |
 78%
From NCERT
NEET - 2022
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A nucleus with mass number \(240\) breaks into fragments each of mass number \(120\). The binding energy per nucleon of unfragmented nuclei is \(7.6\) MeV while that of fragments is \(8.5~\text{MeV}\). The total gain in the binding energy in the process is:

1. \(804\) MeV  2. \(216\) MeV
3. \(0.9\) MeV 4. \(9.4\) MeV
Subtopic:  Nuclear Binding Energy |
 61%
From NCERT
NEET - 2021
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A radioactive nucleus XZA undergoes spontaneous decay in the sequence XZA Bz-1  Cz-3 Dz-2, where Z is the atomic number of element X. The possible decay particles in the sequence are: 

1. β+, α, β-

2. β-, α, β+

3. α,  β-, β+

4. α,  β+, β-

Subtopic:  Types of Decay |
 68%
From NCERT
NEET - 2021
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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

Subtopic:  Mass-Energy Equivalent |
 60%
From NCERT
NEET - 2020
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When a uranium isotope U92235  is bombarded with a neutron, it generates  K3689r, three neutrons and: 

1. Z4091r

2. K36101r

3. K36103r

4. B56144a

Subtopic:  Nuclear Energy |
 84%
From NCERT
NEET - 2020
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What happens to the mass number and the atomic number of an element when it emits \(\gamma\)-radiation?

1. mass number decreases by four and atomic number decreases by two.
2. mass number and atomic number remain unchanged.
3. mass number remains unchanged while the atomic number decreases by one.
4. mass number increases by four and the atomic number increases by two.
Subtopic:  Types of Decay |
 83%
From NCERT
NEET - 2020
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If the radius of \(\mathrm{Al}\) nucleus is taken to be \(\mathrm{R}_{\mathrm{Al}},\) then the radius of Te53125 nucleus is near:
1. 531313RAl

2. 53RAl

 
3. 35RAl

 
4. 1353RAl

Subtopic:  Nuclear Binding Energy |
 75%
From NCERT
NEET - 2015
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The Binding energy per nucleon of \(^{7}_{3}Li\) and \(^{4}_{2}He\) nucleon are \(5.60~\text{MeV}\) and \(7.06~\text{MeV}\), respectively. In the nuclear reaction \(^{7}_{3}Li + ^{1}_{1}H \rightarrow ^{4}_{2}He + ^{4}_{2}He +Q\), the value of energy \(Q\) released is:
1. \(19.6~\text{MeV}\)
2. \(-2.4~\text{MeV}\)
3. \(8.4~\text{MeV}\)
4. \(17.3~\text{MeV}\)

Subtopic:  Nuclear Binding Energy |
 64%
From NCERT
AIPMT - 2014
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A certain mass of Hydrogen is changed to Helium by the process of fusion. The mass defect in the fusion reaction is \(0.02866~\text{u}\). The energy liberated per nucleon is: (given \(1~\mathrm{u} = 931~\text{MeV}\) )
1. \(26.7~\text{MeV}\)
2. \(6.675~\text{MeV}\)
3. \(13.35~\text{MeV}\)
4. \(2.67~\text{MeV}\)
Subtopic:  Mass-Energy Equivalent |
From NCERT
AIPMT - 2013
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