# The binding energy per nucleon of deuterium and helium atom is $$1.1$$ MeV and $$7.0$$ MeV. If two deuterium nuclei fuse to form a helium atom, the energy released is: 1. $$19.2$$ MeV 2. $$23.6$$ MeV 3. $$26.9$$ MeV  4. $$13.9$$ MeV

Subtopic:  Nuclear Binding Energy |
76%
From NCERT
PMT - 2001
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In a fission reaction,
$$^{236}_{92}\mathrm{U}\rightarrow ~^{117}\mathrm{X}~+~^{117}\mathrm{Y}~+~^1_0n~+~^1_0n,$$ the binding energy per nucleon of $$\mathrm{X}$$ and $$\mathrm{Y}$$ is $$8.5$$ MeV whereas that of $$^{236}\mathrm{U}$$ is $$7.6$$ MeV. The total energy liberated will be about:
1. $$2000$$ MeV
2. $$200$$ MeV
3. $$2$$ MeV
4. $$1$$ keV

Subtopic:  Nuclear Binding Energy |
76%
From NCERT
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A nuclear reaction along with the masses of the particle taking part in it is as follows;
$$~~A ~~~~+~~~ B~~~~~ \rightarrow~~~~C ~~+~~~~ D~~~~~ ~~Q~ MeV\\ \small{1.002~~~~~~~~ 1.004 ~~~~~~~~~~~~~1.001~~~~~~~1.003}\\ \small{amu~~~~~~~~~~amu~~~~~~~~~~~~~~amu~~~~~~~~~amu} ~~$$
The energy $$Q$$ liberated in the reaction is:
1. $$1.234$$ MeV
2. $$0.931$$ MeV
3. $$0.465$$ MeV
4. $$1.862$$ MeV

Subtopic:  Mass-Energy Equivalent |
75%
From NCERT
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When a deuterium is bombarded on $${}_{8}^{16}\mathrm{O}$$ nucleus, an $$\alpha\text-$$particle is emitted, then the product nucleus is:
 1 $${}_{7}^{13}\mathrm{N}$$ 2 $${}_{5}^{10}\mathrm{B}$$ 3 $${}_{4}^{9}\mathrm{Be}$$ 4 $${}_{7}^{14}\mathrm{N}$$
Subtopic:  Types of Decay |
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The mass of $${}_{7}^{15}\mathrm{N}$$ is $$15.00011$$ amu, mass of $${}_{8}^{16}\mathrm{O}$$ is $$15.99492$$ amu and $$m_p = 1.00783$$ amu. Determine the binding energy of the last proton of $${ }_{8}^{16}\mathrm{O}$$.
1. $$2.13$$ MeV
2. $$0.13$$ MeV
3. $$10$$ MeV
4. $$12.13$$ MeV

Subtopic:  Nuclear Binding Energy |
51%
From NCERT
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The power obtained in a reactor using $$\mathrm{U}^{235}$$ disintegration is $$1000$$ kW. The mass decay of $$\mathrm{U}^{235}$$ per hour is:
1. $$1$$ microgram
2. $$10$$ microgram
3. $$20$$ microgram
4. $$40$$ microgram

Subtopic:  Nuclear Energy |
From NCERT
PMT - 2011
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In the nuclear reaction: $$\mathrm{X}\left(n,\alpha\right){}_{3}^{7}\mathrm{Li}$$ the term $$\mathrm{X}$$ will be:

 1 $${}_{5}^{10}\mathrm{B}$$ 2 $${}_{5}^{9}\mathrm{B}$$ 3 $${}_{5}^{11}\mathrm{B}$$ 4 $${}_{2}^{4}\mathrm{He}$$
Subtopic:  Types of Decay |
From NCERT
PMT - 2001
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In a radioactive decay process, the negatively charged emitted $\beta$-particles are:

 1 The electrons present inside the nucleus. 2 The electrons produced as a result of the decay of neutrons inside the nucleus. 3 The electrons produced as a result of collisions between atoms. 4 The electrons orbiting around the nucleus.
Subtopic:  Types of Decay |
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In the reaction $${}_{1}^{2}\mathrm{H}+ {}_{1}^{3}\mathrm{H}\rightarrow {}_{2}^{4}\mathrm{He}+ {}_{0}^{1}\mathrm{n}$$
if the binding energies of $${}_{1}^{2}\mathrm{H}, {}_{1}^{3}\mathrm{H},$$ and $${}_{2}^{4}\mathrm{He}$$ are respectively $$a,b,$$ and $$c$$ (in MeV), then the energy in (MeV) released in this reaction is:
1. $$c+a-b$$
2. $$c-a-b$$
3. $$a+b​​​​+c$$
4. $$a+b-c$$

Subtopic:  Nuclear Binding Energy |
73%
From NCERT
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Which of the following is used as a moderator in nuclear reactors?

1. Plutonium