# The energy equivalent of one atomic mass unit is: 1. $$1.6\times 10^{-19}~\text{J}$$ 2. $$6.02\times 10^{23}~\text{J}$$ 3. $$931~\text{MeV}$$ 4. $$9.31~\text{MeV}$$

Subtopic:  Mass-Energy Equivalent |
82%
From NCERT
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Solar energy is due to:

1. fusion reaction.

2. fission reaction.

3. combustion reaction.

4. chemical reaction.

Subtopic:  Nuclear Energy |
66%
From NCERT
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If the nuclear force between two protons, two neutrons and between a proton and a neutron is denoted by $$F_{pp} ,F_{nn}$$ and $$F_{pn}$$ respectively, then:
1. $$F_{p p} \approx F_{n n} \approx F_{p n}$$
2. $$F_{p p} \neq F_{n n}$$ and $$F_{p n} = F_{n n}$$
3. $$F_{p p} = F_{n n} = F_{p n}$$
4. $$F_{p p} \neq F_{n n} \neq F_{p n}$$
Subtopic:  Nuclear Energy |
From NCERT
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The stable nucleus that has a radius half of the radius of $$\mathrm{Fe}^{56}$$ is:
1. $$\mathrm{Li}^7$$
2. $$\mathrm{Na}^{21}$$
3. $$\mathrm{S}^{16}$$
4. $$\mathrm{Ca}^{40}$$

Subtopic:  Nucleus |
66%
From NCERT
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Which of the following is used as a moderator in nuclear reactors?

1. Plutonium

3. Heavy water

4. Uranium

Subtopic:  Nuclear Energy |
80%
From NCERT
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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 |
76%
From NCERT
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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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