A nucleus represented by the symbol $${}_{Z}^{A}\mathrm{X}$$ has:
 1 $$Z$$ protons and $$A-Z$$ neutrons 2 $$Z$$ protons and $$A$$ neutrons 3 $$A$$ protons and $$Z-A$$ neutrons 4 $$Z$$ neutrons and $$A-Z$$ protons
Subtopic: Â Nuclear Binding Energy |
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From NCERT
AIPMT - 2004
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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: Â Nuclear Binding Energy |
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From NCERT
NEET - 2013
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Let $$F_{pp}, F_{pn}~\text{and}~F_{nn}$$ denote the magnitudes of the net force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. Neglect gravitational force. When the separation is $$1~\text{fm}$$,

 1 $$F_{pp}> F_{pn}=F_{nn}$$ 2 $$F_{pp}= F_{pn}=F_{nn}$$ 3 $$F_{pp}> F_{pn}>F_{nn}$$ 4 $$F_{pp}< F_{pn}=F_{nn}$$
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The gravitational force between $$H\text-$$atom and another particle of mass $$m$$ will be given by Newton's law $$F=\dfrac{GMm}{r^2},$$ where $$r$$ is in km and
 1 $$M = m_{\text{proton}}+ m_{\text{electron}}.$$ 2 $$M = m_{\text{proton}}+ m_{\text{electron}}-\frac{B}{c^2}\left(B= 13.6~\text{eV}\right)$$. 3 $$M$$ is not related to the mass of the hydrogen atom. 4 $$M = m_{\text{proton}}+ m_{\text{electron}}-\frac{|V|}{c^2}(|V|=$$ magnitude of the potential energy of electron in the $$H\text-$$atom).
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In an exoergic nuclear reaction (i.e. energy is released in the reaction), let
$$E_1:$$ total binding energy of initial nuclei
$$E_2:$$ total binding energy of final nuclei
$$A_1:$$ total number of nucleons of initial nuclei
$$A_2:$$ total number of nucleons of final nuclei
Then:
1.  $$E_1>E_2$$
2.  $$E_2>E_1$$
3.  $$E_1=E_2$$
4.  $$\frac{E_1}{A_1}=\frac{E_2}{A_2}$$
Subtopic: Â Nuclear Binding Energy |
From NCERT
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The Binding energy per nucleon of $$^{7}_{3}\mathrm{Li}$$ and $$^{4}_{2}\mathrm{He}$$ nucleon are $$5.60~\text{MeV}$$ and $$7.06~\text{MeV}$$, respectively. In the nuclear reaction $$^{7}_{3}\mathrm{Li} + ^{1}_{1}\mathrm{H} \rightarrow ^{4}_{2}\mathrm{He} + ^{4}_{2}\mathrm{He} +Q$$, 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: Â Nuclear Binding Energy |
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From NCERT
AIPMT - 2014
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The mass of a ${}_{3}{}^{7}\mathrm{Li}$ nucleus is $$0.042~\text{u}$$ less than the sum of the masses of all its nucleons. The binding energy per nucleon of the ${}_{3}{}^{7}\mathrm{Li}$ nucleus is near:
1. $$4.6~\text{MeV}$$
2. $$5.6~\text{MeV}$$
3. $$3.9~\text{MeV}$$
4. $$23~\text{MeV}$$

Subtopic: Â Nuclear Binding Energy |
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From NCERT
AIPMT - 2010
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The binding energy of deuteron is $$2.2~\text{MeV}$$ and that of $$_2\mathrm{He}^{4}$$ is $$28~\text{MeV}$$. If two deuterons are fused to form one $$_{2}\mathrm{He}^{4}$$${}^{}$then the energy released is:
1. $$25.8~\text{MeV}$$
2. $$23.6~\text{MeV}$$
3. $$19.2~\text{MeV}$$
4. $$30.2~\text{MeV}$$

Subtopic: Â Nuclear Binding Energy |
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From NCERT
AIPMT - 2006
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In the reaction $${ }_1^2 \mathrm{H}+{ }_1^3 \mathrm{H} \longrightarrow{ }_2^4 \mathrm{He}+{ }_0^1 n$$ , if the binding energies of $${ }_1^2 \mathrm{H},~_1^3 \mathrm{H} ~\text{and}~_2^4\mathrm{H}$$ He are respectively $$a,b$$ and $$c$$ (in MeV,) then the energy (in MeV) released in this reaction is:
1. $$a+b+c$$
2. $$c+a-b$$
3. $$c-a-b$$
4. $$a+b-c$$
Subtopic: Â Nuclear Binding Energy |
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From NCERT
AIPMT - 2005
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If in a nuclear fusion process. the masses of the fusing nuclei be $$m_1$$ and $$m_2$$ and the mass of the resultant nucleus be $$m_3,$$ then:
 1 $$m_3=\left|m_1-m_2 \right|$$ 2 $$m_3<\left ( m_1+m_2 \right )$$ 3 $$m_3>\left ( m_1+m_2 \right )$$ 4 $$m_3=\left ( m_1+m_2 \right )$$
Subtopic: Â Nuclear Binding Energy |
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From NCERT
AIPMT - 2004
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